CN116345645A - Power supply circuit, method and system for wide-range voltage input - Google Patents

Power supply circuit, method and system for wide-range voltage input Download PDF

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Publication number
CN116345645A
CN116345645A CN202310613146.2A CN202310613146A CN116345645A CN 116345645 A CN116345645 A CN 116345645A CN 202310613146 A CN202310613146 A CN 202310613146A CN 116345645 A CN116345645 A CN 116345645A
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CN
China
Prior art keywords
capacitor
resistor
twenty
voltage stabilizing
pin
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Pending
Application number
CN202310613146.2A
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Chinese (zh)
Inventor
盛锋
卓春丽
方兰秋
曾连娟
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Shenzhen Xin Saike Technology Co ltd
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Shenzhen Xin Saike Technology Co ltd
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Priority to CN202310613146.2A priority Critical patent/CN116345645A/en
Publication of CN116345645A publication Critical patent/CN116345645A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The application relates to a power supply circuit, a method and a system for wide-range voltage input, which belong to the technical field of circuit design and comprise a voltage stabilizing unit, wherein the input end of the voltage stabilizing unit is used for receiving an input voltage signal, and the output end of the voltage stabilizing unit is used for outputting a control signal so as to keep the stability of load voltage; and the input end of the switch unit is connected with the output end of the voltage stabilizing unit and is used for receiving the control signal, and the output end of the switch unit is connected with a load. The application has the following effects that the application can adapt to wide-range voltage input, the mainboard can not be burnt out along with the change of input voltage and the change of lithium battery capacity, and the common mainboard is 12V voltage input, and the application can support 9-36V voltage input.

Description

Power supply circuit, method and system for wide-range voltage input
Technical Field
The present disclosure relates to the field of circuit design technologies, and in particular, to a power supply circuit, method, and system for wide-range input.
Background
The lithium battery provides stable input voltage for the robot, and as the capacity of the lithium battery can change along with the voltage of the power supply circuit, the input voltage of a general power supply main board is 12V, and the input of surge voltage can not be applied, so that the main board can be damaged.
Disclosure of Invention
In order to solve the problem that the input of surge voltage by the existing robot cannot be applied to cause the damage of a main board, the application provides a power supply circuit, a power supply method and a power supply system with wide-range voltage input.
In a first aspect, the present application provides a power supply circuit with a wide range of voltage input, which adopts the following technical scheme:
a power supply circuit for a wide range of voltage inputs, comprising:
the input end of the voltage stabilizing unit is used for receiving an input voltage signal, and the output end is used for
Outputting a control signal for maintaining the stability of the load voltage;
the switch unit comprises six input ends, wherein the six input ends are respectively connected with
And the output ends of the switching units are connected with a load.
By adopting the technical scheme, after the power signal is input, the voltage stabilizing unit judges whether the voltage or current signal is in the working range of the voltage or current signal, and then the output control signal controls the conduction degree of the switch unit so as to enable the output current or voltage to meet the requirement of a load and keep the stability of the voltage output to the load. Therefore, the lithium battery voltage input device can adapt to wide-range voltage input, a main board cannot be burnt out along with the change of input voltage and the change of lithium battery capacity, and a common main board is 12V voltage input.
Preferably, the anti-reverse connection unit is further provided with a first input end connected with a power supply, a second input end connected with a DC_IN end, and an output end of the anti-reverse connection unit outputs DC_12V voltage; the anti-reverse connection unit comprises a seventh diode, a twenty-eighth resistor, a twenty-ninth resistor, a thirty-eighth resistor, a twenty-ninth capacitor, a thirty-eighth capacitor, a thirty-first capacitor, a thirty-second capacitor, a thirty-third capacitor and a fifth field effect transistor, one end of the seventh diode is connected to a first input end of the anti-reverse connection unit, the other end of the seventh diode is grounded, one end of the twenty-eighth resistor is connected to one end of the seventh diode, the other end of the twenty-eighth resistor is connected to one end of the twenty-ninth capacitor, the other end of the twenty-eighth resistor is grounded, a connection node of the seventh diode and the twenty-eighth resistor is connected to one end of the thirty-first capacitor, a second input end of the anti-reverse connection unit, one end of the thirty-first capacitor, one end of the thirty-third resistor, a drain electrode of the fifth field effect transistor and one end of the thirty-second capacitor, the other end of the thirty-eighth resistor is connected to another end of the thirty-first capacitor and the thirty-second capacitor, the other end of the thirty-first resistor is connected to the thirty-second input end of the thirty-first capacitor, the thirty-first resistor is connected to another end of the thirty-second capacitor; the seventh diode is a transient diode.
By adopting the technical scheme, by utilizing the high-efficiency protection characteristic of the transient diode, when the seventh diode detects that the ground wire has current, all circuits can be automatically turned over and disconnected, and even if a power supply is reversely connected, the power supply cannot flow into a rear main board, so that the main board is prevented from being damaged.
Preferably, the voltage stabilizing unit comprises a voltage stabilizing chip, a first pin of the voltage stabilizing chip is connected with one end of the first resistor and one end of the second resistor, the other end of the first resistor is connected with a 12V power supply, and the other end of the second resistor is grounded; the second pin of the voltage stabilizing chip is connected with one end of the first capacitor, and the other end of the first capacitor is grounded; a third pin of the voltage stabilizing chip is connected with one end of a third resistor, and the other end of the third resistor is connected with a sixth input end of the switch unit; the fourth pin of the voltage stabilizing chip is connected with one end of the fourth resistor, the other end of the fourth resistor is grounded, and the second capacitor is connected between the third pin and the fourth pin of the voltage stabilizing chip; the fifth pin of the voltage stabilizing chip is connected with one end of the third capacitor and one end of the fifth resistor, the other end of the third capacitor is grounded, the other end of the fifth resistor is connected with one end of the fourth capacitor, and the other end of the fourth capacitor is grounded; the sixth pin of the voltage stabilizing chip is grounded; a seventh pin of the voltage stabilizing chip is connected with one end of the sixth resistor and one end of the seventh resistor, the other end of the sixth resistor is connected with an INTMC end, and the other end of the seventh resistor is grounded; an eighth pin of the voltage stabilizing chip is connected with one end of the eighth resistor, and the other end of the eighth resistor is grounded; a ninth pin of the voltage stabilizing chip is connected with the VDC_IN end; a tenth pin of the voltage stabilizing chip is connected with one end of the fifth capacitor and one end of the eleventh resistor, the other end of the fifth capacitor is connected with the other end of the eighth resistor, and the other end of the eleventh resistor is connected with a VDC_IN end; an eleventh pin of the voltage stabilizing chip is connected with one end of the sixth capacitor and one end of the twelfth resistor, the other end of the sixth capacitor is connected with a connecting node of the eighth resistor and the fifth capacitor, and the other end of the twelfth resistor is used for outputting 12V voltage; a twelfth pin of the voltage stabilizing chip is connected with one end of the thirteenth resistor and one end of the fourteenth resistor, the other end of the thirteenth resistor is connected with an INTMC end, and the other end of the fourteenth resistor is grounded; a thirteenth pin of the voltage stabilizing chip is connected with one end of the fifteenth resistor, and the other end of the fifteenth resistor is connected with the output end of the switching unit; a fourteenth pin of the voltage stabilizing chip is connected with one end of the sixteenth resistor, the other end of the sixteenth resistor is connected with the output end of the switching unit, and the seventh capacitor is connected between a thirteenth pin and a fourteenth pin of the voltage stabilizing chip; the fifteenth pin of the voltage stabilizing chip is grounded; a sixteenth pin of the voltage stabilizing chip is connected with one end of the eighth capacitor, and the other end of the eighth capacitor is connected with an eighteenth pin and a twenty-first pin of the voltage stabilizing chip; a seventeenth pin of the voltage stabilizing chip is connected with a first input end of the switch unit; a nineteenth pin of the voltage stabilizing chip is connected with a fourth input end of the switch unit; the twentieth pin of the voltage stabilizing chip is connected with one end of the ninth capacitor, and the other end of the ninth capacitor is grounded; the twenty-first pin of the voltage stabilizing chip is used for outputting a voltage signal to an INTMC end and is connected with the cathode of the third diode, the cathode of the fourth diode and one end of the tenth capacitor, the anode of the third diode is connected with the eighteenth pin of the voltage stabilizing chip and the connecting node of the eighth capacitor, the anode of the fourth diode is connected with the twenty-fifth pin and the twenty-seventh pin of the voltage stabilizing chip, and the other end of the tenth capacitor is grounded; a twenty-second pin of the voltage stabilizing chip receives an input voltage signal; a twenty-third pin of the voltage stabilizing chip is connected with a third input end of the switch unit; a twenty-fourth pin of the voltage stabilizing chip is grounded; a twenty-fifth pin of the voltage stabilizing chip is connected with one end of the twentieth resistor, the other end of the twentieth resistor is connected with the anode of the fourth diode and one end of the eleventh capacitor, and the other end of the eleventh capacitor is connected with a twenty-seventh pin of the voltage stabilizing chip; a twenty-sixth pin of the voltage stabilizing chip is connected with a second input end of the switch unit; a twenty-seventh pin of the voltage stabilizing chip is connected with the other end of the eleventh capacitor and a fifth input end of the switch unit; and the twenty eighth pin of the voltage stabilizing chip is connected with the INTMC end.
By adopting the technical scheme, the standard value of the overcurrent protection is set through the twelfth pin, and if the output current exceeds the preset overcurrent protection value, the switch unit is turned off and turned on due to the internal mechanism of the voltage stabilizing chip; when the tenth pin and the eleventh pin detect that the input voltage is not in the working range of the voltage stabilizing chip, the soft start is closed, and the output is stopped; the third pin, the fourth pin, the thirteenth pin and the fourteenth pin are used for detecting output voltage or current, and the voltage stabilizing chip controls the conduction degree of the switch unit through the detected output data so as to achieve current output with different magnitudes.
Preferably, the voltage stabilizing unit further comprises a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twenty first resistor, a twenty second resistor and a second diode, wherein a seventeenth pin of the voltage stabilizing chip is connected with one end of the seventeenth resistor, and the other end of the seventeenth resistor is connected with the first input end of the switching unit; a twenty-third pin of the voltage stabilizing chip is connected with one end of the nineteenth resistor, and the other end of the nineteenth resistor is connected with a third input end of the switch unit; a twenty-sixth pin of the voltage stabilizing chip is connected with one end of the twenty-first resistor, and the other end of the twenty-first resistor is connected with a second input end of the switch unit; a twenty eighth pin of the voltage stabilizing chip is connected with one end of the twenty second resistor, and the other end of the twenty second resistor is connected with an INTMC end; the nineteenth pin of the voltage stabilizing chip is connected with the anode of the second diode and one end of the eighteenth resistor, and the connecting node of the cathode of the second diode and the other end of the eighteenth resistor is connected with the fourth input end of the switching unit.
By adopting the technical scheme, the eighteenth resistor and the second diode can play a role in current limiting protection, and reduce the interference of feedback jitter on PWM signals. The seventeenth resistor, the nineteenth resistor, the twenty first resistor and the twenty second resistor play a role in current limiting so as to achieve the effect of protecting a circuit.
Preferably, the switching unit includes a first field effect transistor, a second field effect transistor, a third field effect transistor, a fourth field effect transistor, a fifth diode, a sixth diode, a twelfth capacitor, a thirteenth capacitor, a twenty-fifth resistor, a twenty-sixth resistor, and an inductor; the grid electrode of the second field effect transistor is connected with the TG1 end of the voltage stabilizing unit, the source electrode of the second field effect transistor is connected with the SW1 end of the voltage stabilizing unit, the drain electrode of the third field effect transistor, one end of the thirteenth capacitor, the anode of the fifth diode and one end of the inductor, the other end of the thirteenth capacitor is connected with one end of the twenty-sixth resistor, and the other end of the twenty-sixth resistor is connected with the drain electrode of the second field effect transistor and the input end of the voltage stabilizing unit; the grid electrode of the third field effect tube is connected with the BG1 end of the voltage stabilizing unit, the source electrode of the third field effect tube is connected with the cathode of the fifth diode, the source electrode of the fourth field effect tube and the SENSE1+ end of the voltage stabilizing unit, the grid electrode of the fourth field effect tube is connected with the BG2 end of the voltage stabilizing unit, the source electrode of the fourth field effect tube is also connected with one end of the twenty-fifth resistor, the other end of the twenty-fifth resistor is connected with one end of the twelfth capacitor, the other end of the twelfth capacitor is connected with the drain electrode of the fourth field effect tube, the other end of the inductor, the source electrode of the first field effect tube and the cathode of the sixth diode, the grid electrode of the first field effect tube is connected with the TG2 end of the voltage stabilizing unit, the drain electrode of the first field effect tube is connected with the anode of the sixth diode, one end of the fourteenth capacitor and one end of the fifteenth capacitor, the other end of the fourteenth capacitor is connected with the other end of the fourteenth capacitor, and the other end of the fifteenth capacitor is connected with the output node of the fourteenth capacitor as the fourteenth node.
By adopting the technical scheme, the control signals of the voltage stabilizing chip are received so as to adjust the duty ratio of each field effect transistor, realize current output with different sizes, and close the conduction of the field effect transistor under the action of an internal mechanism when the voltage stabilizing chip is matched for overcurrent protection, thereby protecting the main board.
Preferably, the input end of the voltage stabilizing unit is connected with a first electromagnetic interference preventing unit, and the first electromagnetic interference preventing unit comprises a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty first capacitor, a twenty second capacitor, a twenty third capacitor, a twenty fourth capacitor and a twenty seventh resistor, and the sixteenth capacitor, the seventeenth capacitor, the eighteenth capacitor, the nineteenth capacitor, the twentieth capacitor, the twenty first capacitor, the twenty second capacitor and the twenty third capacitor are sequentially connected in parallel between a power supply and ground; one end of the twenty-seventh resistor is connected with one end of the twenty-third capacitor and the output end of the switching unit, the other end of the twenty-seventh resistor is connected with one end of the twenty-fourth capacitor, the other end of the twenty-fourth capacitor is grounded, and a connection node of the twenty-seventh resistor and the twenty-fourth capacitor is connected with the input end of the voltage stabilizing unit.
By adopting the technical scheme, a plurality of capacitors are connected in parallel at the input end of the voltage stabilizing unit, and can filter interference waveforms and clutter so as to achieve the effects of improving and strengthening protection interference.
Preferably, the output end of the switch unit is connected with a second electromagnetic interference prevention unit, the second electromagnetic interference prevention unit comprises a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor and a twenty-eighth capacitor, and the twenty-fifth capacitor, the twenty-sixth capacitor, the twenty-seventh capacitor and the twenty-eighth capacitor are sequentially connected in parallel between the output end of the switch unit and the ground.
Through adopting above-mentioned technical scheme, a plurality of condensers are parallelly connected in the output of switch unit, can filter interference waveform, clutter, reach the effect of improvement and strengthening protection interference for the signal input to the load is more stable.
In a second aspect, the present application provides a power supply method for wide-range voltage input, which adopts the following technical scheme:
acquiring a voltage value of an input signal;
comparing the voltage value of the input signal with a standard value;
boosting or reducing the input signal;
Outputting the processed signal to a load.
Through adopting above-mentioned technical scheme, according to the voltage value of the input signal who obtains and the standard value that sets for compares, when this voltage value is greater than or less than the standard value, correspondingly, carries out step-down or step-up processing to the input signal, again exports the signal after the processing to the load to can compatible wide range voltage input, also can not cause the damage to the mainboard, thereby promoted the use universality.
Preferably, the step-up or step-down processing of the input signal includes:
if the voltage value of the input signal is smaller than the standard value, performing boosting treatment on the input signal;
and if the voltage value of the input signal is larger than the standard value, performing step-down processing on the input signal.
Through adopting above-mentioned technical scheme, when the voltage value of input signal is less than the standard value, then carry out the boost processing to input signal, and the voltage value of input signal is greater than the standard value, then carry out the step-down processing to input signal to make output voltage stabilize in the voltage value department of load demand, thereby compatible wide range voltage input.
In a third aspect, the present application provides a power supply system with wide voltage input, which adopts the following technical scheme:
The acquisition module is used for acquiring the voltage value of the input signal;
the comparison module is used for comparing the voltage value of the input signal with a standard value;
the processing module is used for carrying out boosting or depressurization processing on the input signal;
and the output module is used for outputting the processed signals to a load.
Through adopting above-mentioned technical scheme, utilize the voltage value that obtains the module to acquire input signal earlier, then compare the module and compare above-mentioned voltage value with the standard value of settlement, when above-mentioned voltage value is greater than the standard value of settlement, processing module carries out the step-down processing to input signal, and when above-mentioned voltage value is less than the standard value of settlement, processing module carries out the step-up processing to input signal to make surge voltage's input also can guarantee stable voltage's output.
In summary, the present application includes at least one of the following beneficial technical effects:
1. after the power signal is input, the voltage or current signal is firstly judged whether to be in the working range by the voltage stabilizing unit, and a control signal is output to control the conduction degree of the switch unit, so that the current or voltage output to the load meets the requirement value of the load. Therefore, the lithium battery voltage input device can adapt to wide-range voltage input, a main board cannot be burnt out along with the change of input voltage and the change of lithium battery capacity, and a common main board is 12V voltage input.
2. Through addding and preventing reverse connection unit, after the anodal and negative pole reverse connection of power, because prevent the guard measure of reverse connection, this signal can not input in the mainboard, has prevented causing the damage to the mainboard.
Drawings
Fig. 1 is a schematic circuit diagram of a power supply circuit with a wide range of voltage inputs according to an embodiment of the present application.
Fig. 2 is a schematic circuit diagram of an anti-reverse connection unit of a power supply circuit with a wide voltage input according to an embodiment of the present application.
Fig. 3 is a block diagram of a voltage stabilizing chip of a power supply circuit with a wide range of voltage inputs according to an embodiment of the present application.
Fig. 4 is a flow chart of a method for supplying power with a wide range of voltage inputs according to an embodiment of the present application.
Fig. 5 is another flow chart of a power supply method for a wide range voltage input according to an embodiment of the present application.
Fig. 6 is a block diagram of a power supply system with a wide range of voltage inputs according to an embodiment of the present application.
Reference numerals illustrate: 1. a voltage stabilizing unit; 2. a switching unit; 3. an anti-reverse connection unit; 4. a first electromagnetic interference prevention unit; 5. and the second electromagnetic interference prevention unit.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-5.
The embodiment of the application discloses a power supply circuit with wide-range voltage input, referring to fig. 1, comprising: the voltage stabilizing unit 1, the input end of the voltage stabilizing unit 1 is used for receiving the input voltage signal, and the output end is used for
Outputting a control signal for maintaining the stability of the load voltage;
the switching unit 2 comprises six input ends, wherein the six input ends are respectively connected with different output ends of the voltage stabilizing unit 1 and are used for receiving control signals, and the output ends of the switching unit 2 are connected with a load;
the circuit is used for matching with a lithium battery in the robot to supply power, after a power signal is input, the voltage stabilizing unit 1 judges whether a voltage or current signal is in the working range of the voltage or current signal, and then outputs a control signal to the switching unit 2 to control the switching unit 2 to be turned on or off and output different currents or voltage signals so as to keep the stability of the voltage output to a load. Therefore, the lithium battery voltage input device can adapt to wide-range voltage input, a main board cannot be burnt out along with the change of input voltage and the change of lithium battery capacity, and a common main board is 12V voltage input.
Referring to fig. 2, the anti-reverse connection unit 3 is further included, a first input end of the anti-reverse connection unit 3 is connected with a power supply, a second input end of the anti-reverse connection unit 3 is connected with a dc_in end, and an output end of the anti-reverse connection unit 3 outputs a dc_12v voltage; the anti-reverse 3 unit includes a seventh diode D7, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a thirty-ninth resistor R30, a twenty-ninth capacitor C29, a thirty-third capacitor C30, a thirty-first capacitor C31, a thirty-second capacitor C32, a thirty-third capacitor C33, and a fifth field-effect transistor Q5, one end of the seventh diode D7 is connected to the first input terminal of the anti-reverse 3 unit, the other end of the seventh diode D7 is grounded, one end of the twenty-eighth resistor R28 is connected to one end of the seventh diode D7, the other end of the twenty-eighth resistor R28 is connected to one end of the twenty-ninth capacitor C29, the other end of the twenty-ninth capacitor C29 is grounded, the connection node of the seventh diode D7 and the twenty-eighth resistor R28 is connected to one end of the thirty-third capacitor C30, the second input terminal of the anti-reverse 3, one end of the thirty-first capacitor C31, one end of the thirty-third resistor R30, one end of the drain of the fifth field-effect transistor Q5, and the other end of the thirty-second capacitor C32 are connected to the other end of the thirty-third capacitor C30, the other end of the thirty-third capacitor C30 is connected to the other end of the thirty-third capacitor C30, the other end of the thirty-eighth resistor R30 is connected to the other end of the thirty-third capacitor C30 is grounded, the other end of the thirty-eighth resistor R30 is connected to the other end of the thirty-third input terminal of the thirty-third capacitor C30; the seventh diode D7 is a transient diode.
By utilizing the high-efficiency protection characteristic of the transient diode, when the seventh diode D7 detects that the ground wire has current, namely, the power supply is reversely connected, the connected circuit can be automatically turned over and disconnected, and then the reversely connected current cannot flow into a subsequent main board to damage the main board, so that the main board is protected.
Specifically, referring to fig. 1 in combination with fig. 3, the voltage stabilizing unit 1 includes a voltage stabilizing chip U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor 15, a sixteenth resistor R16, a twentieth resistor R20, a twenty third resistor R23, a twenty fourth resistor R24, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a third diode D3, and a fourth diode D4.
The first pin of the voltage stabilizing chip U1 is connected with one end of a first resistor R1 and one end of a second resistor R2, the other end of the first resistor R1 is connected with a 12V power supply, and the other end of the second resistor R2 is grounded; the second pin of the voltage stabilizing chip U1 is connected with one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded; the third pin of the voltage stabilizing chip U1 is connected with one end of a third resistor R3, and the other end of the third resistor R3 is connected with the sixth input end of the switch unit 2; the fourth pin of the voltage stabilizing chip U1 is connected with one end of a fourth resistor R4, the other end of the fourth resistor R4 is grounded, and a second capacitor C2 is connected between the third pin and the fourth pin of the voltage stabilizing chip U1; a twenty-third resistor R23 is connected between the other end of the third resistor R3 and the other end of the fourth resistor R4; the fifth pin of the voltage stabilizing chip U1 is connected with one end of a third capacitor C3 and one end of a fifth resistor R5, the other end of the third capacitor C3 is grounded, the other end of the fifth resistor R5 is connected with one end of a fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded; the sixth pin of the voltage stabilizing chip U1 is grounded; the seventh pin of the voltage stabilizing chip U1 is connected with one end of a sixth resistor R6 and one end of a seventh resistor R7, the other end of the sixth resistor R6 is connected with an INTMC end, and the other end of the seventh resistor R7 is grounded; the eighth pin of the voltage stabilizing chip U1 is connected with one end of an eighth resistor R8, and the other end of the eighth resistor R8 is grounded; the ninth pin of the voltage stabilizing chip U1 is connected with the anode of the first diode D1; the tenth pin of the voltage stabilizing chip U1 is connected with one end of a fifth capacitor C5 and one end of an eleventh resistor R11, the other end of the fifth capacitor C5 is connected with the other end of an eighth resistor R8, and the other end of the eleventh resistor R11 is connected with a VDC_IN end; an eleventh pin of the voltage stabilizing chip U1 is connected with one end of a sixth capacitor C6 and one end of a twelfth resistor R12, the other end of the sixth capacitor C6 is connected with a connecting node of an eighth resistor R8 and a fifth capacitor C5, and the other end of the twelfth resistor R12 is used for outputting 12V voltage; the twelfth pin of the voltage stabilizing chip U1 is connected with one end of a thirteenth resistor R13 and one end of a fourteenth resistor R14, the other end of the thirteenth resistor R13 is connected with an INTMC end, and the other end of the fourteenth resistor R14 is grounded; the thirteenth pin of the voltage stabilizing chip U1 is connected with one end of a fifteenth resistor R15, and the other end of the fifteenth resistor R15 is connected with the output end of the switch unit 2; a fourteenth pin of the voltage stabilizing chip U1 is connected with one end of a sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected with the output end of the switch unit 2, and a seventh capacitor C7 is connected between a thirteenth pin and a fourteenth pin of the voltage stabilizing chip U1; a twenty-fourth resistor R24 is connected between the other end of the fifteenth resistor R15 and the other end of the sixteenth resistor R16; the fifteenth pin of the voltage stabilizing chip U1 is grounded; the sixteenth pin of the voltage stabilizing chip U1 is connected with one end of an eighth capacitor C8, and the other end of the eighth capacitor C8 is connected with the eighteenth pin and the twenty-first pin of the voltage stabilizing chip U1; the seventeenth pin of the voltage stabilizing chip U1 is connected with the first input end of the switch unit 2; the nineteenth pin of the voltage stabilizing chip U1 is connected with the fourth input end of the switch unit 2; the twentieth pin of the voltage stabilizing chip U1 is connected with one end of the ninth capacitor C9, and the other end of the ninth capacitor C9 is grounded; the twenty-first pin of the voltage stabilizing chip U1 is used for outputting a voltage signal to an INTMC end and is connected with the cathode of the third diode D3, the cathode of the fourth diode D4 and one end of the tenth capacitor C10, the anode of the third diode D3 is connected with the eighteenth pin of the voltage stabilizing chip U1 and the connecting node of the eighth capacitor C8, the anode of the fourth diode D4 is connected with the twenty-fifth pin and the twenty-seventh pin of the voltage stabilizing chip U1, and the other end of the tenth capacitor C10 is grounded; the twenty-second pin of the voltage stabilizing chip U1 receives an input voltage signal; the twenty-third pin of the voltage stabilizing chip U1 is connected with the third input end of the switch unit 2; the twenty-fourth pin of the voltage stabilizing chip U1 is grounded; the twenty-fifth pin of the voltage stabilizing chip U1 is connected with one end of a twentieth resistor R20, the other end of the twentieth resistor R20 is connected with the positive electrode of a fourth diode D4 and one end of an eleventh capacitor C11, and the other end of the eleventh capacitor C11 is connected with the twenty-seventh pin of the voltage stabilizing chip U1; the twenty-sixth pin of the voltage stabilizing chip U1 is connected with the second input end of the switch unit 2; the twenty-seventh pin of the voltage stabilizing chip U1 is connected with the other end of the eleventh capacitor C11 and the fifth input end of the switch unit 2; the twenty eighth pin of the voltage stabilizing chip U1 is connected with the INTMC end. The third diode D3 and the fourth diode D4 are photodiodes, have unidirectional conductivity, and operate under reverse voltage.
The first pin of the voltage stabilizing chip U1 is used for setting an output voltage value, the second pin is used for setting soft start time, the third pin, the fourth pin, the thirteenth pin and the fourteenth pin are used for detecting output current, the fifth pin is used for adjusting output compensation, the seventh pin is used for setting an output mode of current, the output mode of current comprises a light load mode and a CCM mode, the eighth pin is used for setting the switching frequency of the field effect transistor, the ninth pin is an enabling end of the chip, the tenth pin and the eleventh pin are used for detecting input and output voltage, the twelfth pin is used for overcurrent OCP protection, the conduction of the field effect transistor can be controlled according to the detected input and output voltage and current, the sixteenth pin, the seventeenth pin and the eighteenth pin are used for boosting, the twenty-fifth pin, the twenty-sixth pin and the twenty-seventh pin are used for reducing the voltage so as to control the output of the internal voltage of the chip of the twenty-first pin and be used for matching to realize detection of the output voltage and current.
Specifically, the value of overcurrent protection can be set through the twelfth pin, and when the output current exceeds a preset current value, the field effect tube can be controlled to stop conducting due to the internal mechanism of the chip, so that the main board is prevented from being damaged by overcurrent; when the tenth pin and the eleventh pin detect that the input and output voltage is not in the normal working range of the chip, the soft start is closed, the output of the chip voltage is stopped, and the chip voltage is protected; the third pin, the fourth pin, the thirteenth pin and the fourteenth pin are used for detecting output current, and the chip adjusts the duty ratio according to the detected data so as to achieve different current outputs.
In addition, the voltage of the chip is boosted under the action of the eighth capacitor C8, the tenth capacitor C10 and the third diode D3, and the voltage is boosted to the thirteenth pin, the sixteenth pin, the thirteenth pin and the nineteenth pin, so as to ensure that the field effect transistor connected subsequently can be fully opened.
The voltage stabilizing unit 1 further comprises a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a twenty-first resistor R21, a twenty-second resistor R22 and a second diode D2, wherein the seventeenth pin of the voltage stabilizing chip U1 is connected with one end of the seventeenth resistor R17, and the other end of the seventeenth resistor R17 is connected with the first input end of the switching unit 2; a twenty-third pin of the voltage stabilizing chip U1 is connected with one end of a nineteenth resistor R19, and the other end of the nineteenth resistor R19 is connected with a third input end of the switch unit 2; the twenty-sixth pin of the voltage stabilizing chip U1 is connected with one end of a twenty-first resistor R21, and the other end of the twenty-first resistor R21 is connected with the second input end of the switch unit 2; the twenty eighth pin of the voltage stabilizing chip U1 is connected with one end of a twenty second resistor R22, and the other end of the twenty second resistor R22 is connected with the INTMC end of the twenty first pin of the voltage stabilizing chip U1; the nineteenth pin of the voltage stabilizing chip U1 is connected to the positive electrode of the second diode D2 and one end of the eighteenth resistor R18, and the connection node of the negative electrode of the second diode D2 and the other end of the eighteenth resistor R18 is connected to the fourth input terminal of the switching unit 2.
The eighteenth resistor R18 and the second diode D2 can function as a current limiting protection and reduce the interference of feedback jitter on the PWM signal. The seventeenth resistor R17, the nineteenth resistor R19, the twenty first resistor R21 and the twenty second resistor R22 also serve as current limiting functions to protect the circuit.
Referring to fig. 1, the switching unit 2 includes six input terminals, wherein a first input terminal is connected to a tenth input terminal
The other end of the seventh resistor R17, the second input end is connected to the other end of the twenty-first resistor R21, the third input end is connected to the other end of the nineteenth resistor R19, the fourth input end is connected to the connection node of the negative electrode of the second diode D2 and the eighteenth resistor R18, the fifth input end is connected to the connection node of the twenty-seventh pin of the voltage stabilizing chip U1 and the eleventh capacitor C11, and the sixth input end is connected to the connection node of the third pin of the voltage stabilizing chip U1 and the twenty-third resistor R23.
Specifically, the switching unit 2 includes a first field effect transistor Q1, a second field effect transistor Q2, a third field effect transistor Q3, a fourth field effect transistor Q4, a fifth diode D5, a sixth diode D6, a twelfth capacitor C12, a thirteenth capacitor C13, a twenty-fifth resistor R25, a twenty-sixth resistor R26, and an inductor L. The grid electrode of the second field effect transistor Q2 is connected with the TG1 end of the voltage stabilizing unit 1, the source electrode of the second field effect transistor Q2 is connected with the SW1 end of the voltage stabilizing unit 1, the drain electrode of the third field effect transistor Q3, one end of a thirteenth capacitor C13, the positive electrode of a fifth diode D5 and one end of an inductor L, the other end of the thirteenth capacitor C13 is connected with one end of a twenty-sixth resistor R26, and the other end of the twenty-sixth resistor R26 is connected with the drain electrode of the second field effect transistor Q2 and the input end of the voltage stabilizing unit 1; the grid electrode of the third field effect tube Q3 is connected with the BG1 end of the voltage stabilizing unit 1, the source electrode of the third field effect tube Q3 is connected with the cathode of the fifth diode D5, the source electrode of the fourth field effect tube Q4 and the SENSE1+ end of the voltage stabilizing unit 1, the grid electrode of the fourth field effect tube Q4 is connected with the BG2 end of the voltage stabilizing unit 1, the source electrode of the fourth field effect tube Q4 is also connected with one end of a twenty-fifth resistor R25, the other end of the twenty-fifth resistor R25 is connected with one end of a twelfth capacitor C12, the other end of the twelfth capacitor C12 is connected with the drain electrode of the fourth field effect tube Q4, the other end of an inductor L, the source electrode of the first field effect tube Q1 and the cathode of the sixth diode D6, the grid electrode of the first field effect tube Q1 is connected with the anode of the sixth diode D6, one end of a fourteenth capacitor C14 and one end of a fifteenth capacitor C15, the other end of the fourteenth capacitor C14 is grounded, and the other end of the fifteenth capacitor C15 is connected with the output node C2 of the switch unit as an output node.
Receiving a control signal of the voltage stabilizing chip U1, setting the frequency of the field effect tube to adjust the duty ratio of each field effect tube, realizing current output of different sizes, and closing the conduction of the field effect tube under the action of an internal mechanism when the voltage stabilizing chip U1 is matched for overcurrent protection, thereby protecting the main board.
The input end of the voltage stabilizing unit 1 is connected with a first electromagnetic interference preventing unit 4, and the first electromagnetic interference preventing unit 4 comprises a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a nineteenth capacitor C19, a twenty-first capacitor C21, a twenty-second capacitor C22, a twenty-third capacitor C23, a twenty-fourth capacitor C24 and a twenty-seventh resistor R27, wherein the sixteenth capacitor C16, the seventeenth capacitor C17, the eighteenth capacitor C18, the nineteenth capacitor C19, the twentieth capacitor C20, the twenty-first capacitor C21, the twenty-second capacitor C22 and the twenty-third capacitor C23 are sequentially connected in parallel between a power supply and ground; one end of a twenty-seventh resistor R27 is connected to one end of the twenty-third capacitor C23 and the output end of the switching unit 2, the other end of the twenty-seventh resistor R27 is connected to one end of the twenty-fourth capacitor C24, the other end of the twenty-fourth capacitor C24 is grounded, and the connection node of the twenty-seventh resistor R27 and the twenty-fourth capacitor C24 is connected to the input end of the voltage stabilizing unit 1.
The capacitors are connected in parallel with the input end of the voltage stabilizing unit 1, and can filter interference waveforms and clutter to achieve the effect of improving and strengthening protection interference.
The output end of the switch unit 2 is connected with a second electromagnetic interference prevention unit 5, and the second electromagnetic interference prevention unit 5 comprises a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27 and a twenty-eighth capacitor C28, wherein the twenty-fifth capacitor C25, the twenty-sixth capacitor C26, the twenty-seventh capacitor C27 and the twenty-eighth capacitor C28 are sequentially connected in parallel between the output end of the switch unit 2 and the ground. The twenty-seventh capacitor C27 and the twenty-eighth capacitor C28 are electrolytic capacitors.
The capacitors are connected in parallel at the output end of the switch unit 2, can filter interference waveforms and clutter, achieve the effect of improving and strengthening protection interference, enable signals input to loads to be more stable, enable the twenty-seventh capacitor C27 and the twenty-eighth capacitor C28 to adopt large-capacity electrolytic capacitors, reduce alternating current components in direct current, store enough energy and achieve the effect of constant current.
In one embodiment, referring to fig. 4, a power supply method for a wide range of voltage inputs is provided, comprising:
s10, acquiring a voltage value of an input signal.
S20, comparing the voltage value of the input signal with a standard value.
S30, boosting or reducing the voltage of the input signal.
S40, outputting the processed signals to a load.
And according to the obtained voltage value of the input signal, comparing the obtained voltage value with a set standard value, and when the input voltage signal is too high or too low, carrying out corresponding step-down or step-up processing so as to ensure that the voltage is stably output and compatible with the voltage input in the range of 9-36V, thereby avoiding damaging a main board during surge voltage input.
Referring to fig. 5, the step-up or step-down process is performed on an input signal, including:
if the voltage value of the input signal is smaller than the standard value, the input signal is subjected to boosting processing.
And if the voltage value of the input signal is larger than the standard value, performing step-down processing on the input signal.
When the voltage value of the input signal is smaller than the set standard value, the input signal is subjected to boosting processing,
when the voltage value of the input signal is larger than the set standard value, the input signal is subjected to step-down processing, so that the voltage input to the main board is stabilized at 12V, and the main board is stably supplied with power.
In one embodiment, referring to fig. 6, a power supply system for a wide range of voltage inputs is provided, comprising:
the acquisition module 10 is configured to acquire a voltage value of an input signal.
And the comparison module 20 is used for comparing the voltage value of the input signal with a standard value.
The processing module 30 is configured to perform a step-up or step-down process on the input signal.
And an output module 40 for outputting the processed signal to a load.
The voltage value of the input signal is obtained by the obtaining module 10, the comparing module 20 compares the voltage value with a set standard value, if the voltage value of the input signal is smaller than the set standard value, the processing module 30 performs voltage boosting processing on the input signal, if the voltage value is larger than the set standard value, the processing module 30 performs voltage reducing processing on the input signal, and finally the output module 40 outputs the signal processed by the processing module to a main board of the robot to supply power to the robot.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. A power supply circuit for a wide range of voltage inputs, comprising:
The voltage stabilizing unit (1), the input end of the voltage stabilizing unit (1) is used for receiving the input voltage signal, the output end is used for outputting the control signal, in order to keep the stability of the load voltage;
the switching unit (2), the switching unit (2) includes six input, six the input of switching unit is connected respectively the different outputs of steady voltage unit (1) are used for receiving control signal, the output of switching unit (2) is connected the load.
2. The power supply circuit with wide-range voltage input according to claim 1, further comprising an anti-reverse unit (3), wherein a first input terminal of the anti-reverse unit (3) is connected to a power supply, a second input terminal is connected to a dc_in terminal, and an output terminal of the anti-reverse unit (3) outputs a dc_12v voltage; the anti-reverse connection unit (3) comprises a seventh diode, a twenty-eighth resistor, a twenty-ninth resistor, a thirty-ninth resistor, a twenty-ninth capacitor, a thirty-eighth capacitor, a thirty-first capacitor, a thirty-second capacitor, a thirty-third capacitor and a fifth field effect transistor, one end of the seventh diode is connected to a first input end of the anti-reverse connection unit (3), the other end of the seventh diode is grounded, one end of the twenty-eighth resistor is connected to one end of the seventh diode, the other end of the twenty-eighth resistor is connected to one end of the twenty-ninth capacitor, the other end of the twenty-ninth capacitor is grounded, a connection node of the seventh diode and the twenty-eighth resistor is connected to one end of the thirty-eighth capacitor, a second input end of the anti-reverse connection unit, one end of the thirty-first capacitor, one end of the thirty-first resistor, a drain electrode of the fifth field effect transistor and one end of the thirty-second capacitor are connected to the other end of the thirty-first capacitor, another end of the thirty-eighth capacitor is connected to another end of the thirty-first capacitor, another end of the thirty-first capacitor is connected to another end of the thirty-first capacitor and another thirty-effect transistor, another end of the thirty-eighth capacitor is connected to another end of the thirty-third capacitor and another thirty-effect transistor is connected to another end of the thirty-third capacitor is connected to another end of the thirty-effect transistor is connected to the thirty element, the other end of the thirty-second capacitor is grounded.
3. The power supply circuit of a wide range voltage input according to claim 1, wherein the voltage stabilizing unit (1) includes a voltage stabilizing chip, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a twentieth resistor, a twenty-third resistor, a twenty-fourth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first diode, a third diode, and a fourth diode; the first pin of the voltage stabilizing chip is connected with one end of the first resistor and one end of the second resistor, the other end of the first resistor is connected with a 12V power supply, and the other end of the second resistor is grounded; the second pin of the voltage stabilizing chip is connected with one end of the first capacitor, and the other end of the first capacitor is grounded; a third pin of the voltage stabilizing chip is connected with one end of a third resistor, and the other end of the third resistor is connected with a sixth input end of the switch unit (2); the fourth pin of the voltage stabilizing chip is connected with one end of the fourth resistor, the other end of the fourth resistor is grounded, and the second capacitor is connected between the third pin and the fourth pin of the voltage stabilizing chip; the fifth pin of the voltage stabilizing chip is connected with one end of the third capacitor and one end of the fifth resistor, the other end of the third capacitor is grounded, the other end of the fifth resistor is connected with one end of the fourth capacitor, and the other end of the fourth capacitor is grounded; the sixth pin of the voltage stabilizing chip is grounded; a seventh pin of the voltage stabilizing chip is connected with one end of the sixth resistor and one end of the seventh resistor, the other end of the sixth resistor is connected with an INTMC end, and the other end of the seventh resistor is grounded; an eighth pin of the voltage stabilizing chip is connected with one end of the eighth resistor, and the other end of the eighth resistor is grounded; a ninth pin of the voltage stabilizing chip is connected with an anode of the first diode, one end of the tenth resistor and one end of the ninth resistor, a connecting node between a cathode of the first diode and the other end of the tenth resistor is grounded, one end of the ninth resistor receives a power supply signal, and the other end of the ninth resistor is connected with a VDC_IN end; a tenth pin of the voltage stabilizing chip is connected with one end of the fifth capacitor and one end of the eleventh resistor, the other end of the fifth capacitor is connected with the other end of the eighth resistor, and the other end of the eleventh resistor is connected with a VDC_IN end; an eleventh pin of the voltage stabilizing chip is connected with one end of the sixth capacitor and one end of the twelfth resistor, the other end of the sixth capacitor is connected with a connecting node of the eighth resistor and the fifth capacitor, and the other end of the twelfth resistor is used for outputting 12V voltage; a twelfth pin of the voltage stabilizing chip is connected with one end of the thirteenth resistor and one end of the fourteenth resistor, the other end of the thirteenth resistor is connected with an INTMC end, and the other end of the fourteenth resistor is grounded; a thirteenth pin of the voltage stabilizing chip is connected with one end of the fifteenth resistor, and the other end of the fifteenth resistor is connected with the output end of the switching unit (2); a fourteenth pin of the voltage stabilizing chip is connected with one end of the sixteenth resistor, the other end of the sixteenth resistor is connected with the output end of the switching unit, and the seventh capacitor is connected between a thirteenth pin and a fourteenth pin of the voltage stabilizing chip; the fifteenth pin of the voltage stabilizing chip is grounded; a sixteenth pin of the voltage stabilizing chip is connected with one end of the eighth capacitor, and the other end of the eighth capacitor is connected with an eighteenth pin and a twenty-first pin of the voltage stabilizing chip; a seventeenth pin of the voltage stabilizing chip is connected with a first input end of the switch unit (2); a nineteenth pin of the voltage stabilizing chip is connected with a fourth input end of the switch unit (2); the twentieth pin of the voltage stabilizing chip is connected with one end of the ninth capacitor, and the other end of the ninth capacitor is grounded; the twenty-first pin of the voltage stabilizing chip is used for outputting a voltage signal to an INTMC end and is connected with the cathode of the third diode, the cathode of the fourth diode and one end of the tenth capacitor, the anode of the third diode is connected with the eighteenth pin of the voltage stabilizing chip and the connecting node of the eighth capacitor, the anode of the fourth diode is connected with the twenty-fifth pin and the twenty-seventh pin of the voltage stabilizing chip, and the other end of the tenth capacitor is grounded; a twenty-second pin of the voltage stabilizing chip receives an input voltage signal; a twenty-third pin of the voltage stabilizing chip is connected with a third input end of the switch unit (2); a twenty-fourth pin of the voltage stabilizing chip is grounded; a twenty-fifth pin of the voltage stabilizing chip is connected with one end of the twentieth resistor, the other end of the twentieth resistor is connected with the anode of the fourth diode and one end of the eleventh capacitor, and the other end of the eleventh capacitor is connected with a twenty-seventh pin of the voltage stabilizing chip; a twenty-sixth pin of the voltage stabilizing chip is connected with a second input end of the switch unit (2); a twenty-seventh pin of the voltage stabilizing chip is connected with the other end of the eleventh capacitor and a fifth input end of the switch unit (2); and the twenty eighth pin of the voltage stabilizing chip is connected with the INTMC end.
4. A power supply circuit for a wide range voltage input according to claim 3, characterized in that the voltage stabilizing unit (1) further comprises a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twenty first resistor, a twenty second resistor and a second diode, a seventeenth pin of the voltage stabilizing chip being connected to one end of the seventeenth resistor, the other end of the seventeenth resistor being connected to the first input of the switching unit (2); a twenty-third pin of the voltage stabilizing chip is connected with one end of the nineteenth resistor, and the other end of the nineteenth resistor is connected with a third input end of the switch unit (2); a twenty-sixth pin of the voltage stabilizing chip is connected with one end of the twenty-first resistor, and the other end of the twenty-first resistor is connected with a second input end of the switch unit (2); a twenty eighth pin of the voltage stabilizing chip is connected with one end of the twenty second resistor, and the other end of the twenty second resistor is connected with an INTMC end; the nineteenth pin of the voltage stabilizing chip is connected with the anode of the second diode and one end of the eighteenth resistor, and the connecting node of the cathode of the second diode and the other end of the eighteenth resistor is connected with the fourth input end of the switching unit (2).
5. The wide range voltage input power supply circuit of claim 1, wherein the switching unit (2) comprises a first field effect transistor, a second field effect transistor, a third field effect transistor, a fourth field effect transistor, a fifth diode, a sixth diode, a twelfth capacitor, a thirteenth capacitor, a twenty-fifth resistor, a twenty-sixth resistor, and an inductor; the grid electrode of the second field effect transistor is connected with the TG1 end of the voltage stabilizing unit, the source electrode of the second field effect transistor is connected with the SW1 end of the voltage stabilizing unit, the drain electrode of the third field effect transistor, one end of the thirteenth capacitor, the anode of the fifth diode and one end of the inductor, the other end of the thirteenth capacitor is connected with one end of the twenty-sixth resistor, and the other end of the twenty-sixth resistor is connected with the drain electrode of the second field effect transistor and the input end of the voltage stabilizing unit; the grid electrode of the third field effect tube is connected with the BG1 end of the voltage stabilizing unit, the source electrode of the third field effect tube is connected with the cathode of the fifth diode, the source electrode of the fourth field effect tube and the SENSE1+ end of the voltage stabilizing unit, the grid electrode of the fourth field effect tube is connected with the BG2 end of the voltage stabilizing unit, the source electrode of the fourth field effect tube is also connected with one end of the twenty-fifth resistor, the other end of the twenty-fifth resistor is connected with one end of the twelfth capacitor, the other end of the twelfth capacitor is connected with the drain electrode of the fourth field effect tube, the other end of the inductor, the source electrode of the first field effect tube and the cathode of the sixth diode, the grid electrode of the first field effect tube is connected with the TG2 end of the voltage stabilizing unit, the drain electrode of the first field effect tube is connected with the anode of the sixth diode, one end of the fourteenth capacitor and one end of the fifteenth capacitor, the other end of the fourteenth capacitor is connected with the other end of the fourteenth capacitor, and the other end of the fifteenth capacitor is connected with the output node of the fourteenth capacitor as the fourteenth node.
6. The power supply circuit of a wide range voltage input according to claim 1, characterized in that an input terminal of the voltage stabilizing unit (1) is connected with a first electromagnetic interference preventing unit (4), the first electromagnetic interference preventing unit (4) comprises a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty first capacitor, a twenty second capacitor, a twenty third capacitor, a twenty fourth capacitor and a twenty seventh resistor, and the sixteenth capacitor, the seventeenth capacitor, the eighteenth capacitor, the nineteenth capacitor, the twentieth capacitor, the twenty first capacitor, the twenty second capacitor and the twenty third capacitor are connected in parallel in sequence between a power supply and ground; one end of the twenty-seventh resistor is connected with one end of the twenty-third capacitor and the output end of the switching unit (2), the other end of the twenty-seventh resistor is connected with one end of the twenty-fourth capacitor, the other end of the twenty-fourth capacitor is grounded, and a connection node of the twenty-seventh resistor and the twenty-fourth capacitor is connected with the input end of the voltage stabilizing unit (1).
7. The power supply circuit of a wide range voltage input according to claim 1, characterized in that the output of the switching unit (2) is connected with a second electromagnetic interference preventing unit (5), the second electromagnetic interference preventing unit (5) comprises a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor and a twenty-eighth capacitor, which are connected in parallel in sequence between the output of the switching unit (2) and ground.
8. A power supply method of a power supply circuit using the wide range voltage input as claimed in any one of claims 1 to 7, comprising:
acquiring a voltage value of an input signal;
comparing the voltage value of the input signal with a standard value;
boosting or reducing the input signal;
outputting the processed signal to a load.
9. The power supply method according to claim 8, wherein the step-up or step-down processing of the input signal includes:
if the voltage value of the input signal is smaller than the standard value, performing boosting treatment on the input signal;
and if the voltage value of the input signal is larger than the standard value, performing step-down processing on the input signal.
10. A power supply system based on the power supply method of claim 8, comprising:
the acquisition module is used for acquiring the voltage value of the input signal;
the comparison module is used for comparing the voltage value of the input signal with a standard value;
the processing module is used for carrying out boosting or depressurization processing on the input signal;
and the output module is used for outputting the processed signals to a load.
CN202310613146.2A 2023-05-29 2023-05-29 Power supply circuit, method and system for wide-range voltage input Pending CN116345645A (en)

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