CN204928578U - DC power supply auto -adjusting circuit and DC power supply automatic regulating apparatus - Google Patents
DC power supply auto -adjusting circuit and DC power supply automatic regulating apparatus Download PDFInfo
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- CN204928578U CN204928578U CN201520481628.8U CN201520481628U CN204928578U CN 204928578 U CN204928578 U CN 204928578U CN 201520481628 U CN201520481628 U CN 201520481628U CN 204928578 U CN204928578 U CN 204928578U
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Abstract
The utility model is suitable for an electron field provides a DC power supply auto -adjusting circuit and DC power supply automatic regulating apparatus, and this circuit includes: the power switching over unit, its input is connected with DC power supply, the main control unit, its feeder ear and power switching over unit connection are held in the operation controls that has the regulating command of a plurality of receipt user, the power output unit, its input is connected with the output of main control unit, the protected location, its input is connected with the output of power output unit, and its output is connected with the feedback end of main control unit, the current -limiting resistor of connection between protected location and circuit output. The utility model discloses a key formula triggers the power and realizes stepping up / stepping down the regulation automatically to the automatic shutdown power is adjusted after detecting the executive signal of load, has saved the human cost, and it is high that it adjusts precision, adjusts evenly, quick, and stabilization of output has improved production efficiency, quality, and the regulation that can halt has the overcurrent protection function.
Description
Technical field
The utility model belongs to electronic applications, particularly relates to a kind of DC power supply auto-adjusting circuit and DC power supply automatic regulating equipment.
Background technology
Current electronic product is flooded with people's clothing, food, lodging and transportion--basic necessities of life various aspects, in recent years, some vehicle electronics products, such as car refrigerator is especially subject to the high praise of people, these vehicle electronics products generally all pass through vehicle power (automobile storage battery) and power to it, but may occur that after vehicle power is powered for a long time self electric quantity is too low, power supply between the power supply monitoring panel cutout now just needing vehicle electronics product to pass through to carry and vehicle power, when namely realizing externally fed voltage lower than shutdown threshold value, control vehicle electronics product shuts down, when outside supply power voltage returns to start threshold value, control vehicle electronics product is started shooting.
In the production process of these vehicle electronics products, need to carry out performance test to power supply monitoring control board, to ensure product quality, namely verify in start threshold value by the supply voltage of the power supply monitoring control board output pulsation to vehicle electronics product and can shutdown threshold point power supply monitoring control board realize corresponding start, shutdown controls.
But the supply voltage at present to the power supply monitoring control board output pulsation of vehicle electronics product adopts manual adjustments DC power supply to realize usually, one be regulate time rhythm speed can not grasp, the testing time is long, affects production efficiency; Two is that manual adjustments resolution is low, is difficult to realize high-precision detection; Three is that workload is large, needs at substantial human cost.
Utility model content
The object of the utility model embodiment is to provide a kind of DC power supply auto-adjusting circuit, is intended to solve the existing DC power supply that manually regulates and verifies that vehicle-mounted properties of product cause the problem that efficiency is low, low precision, human cost are high.
The utility model embodiment is achieved in that a kind of DC power supply auto-adjusting circuit, and described circuit comprises:
DC power supply is converted to the power conversion unit of internal supply voltage, the input of described power conversion unit is connected with the output of described DC power supply;
Generate the main control unit of corresponding PWM regulated voltage signal according to the regulating command of user after receiving Trig control signal, described PWM regulated voltage signal is according to the change of default step-length regularity or remain unchanged, the feeder ear of described master control power supply is connected with the output of described power conversion unit, the trigger control end of described main control unit receives Trig control signal, and described main control unit has the operation control end of multiple reception user regulating command;
According to the power stage unit of the corresponding regulation output supply voltage of described PWM regulated voltage signal, the input of described power stage unit is connected with the output of described main control unit;
Control the protected location that described main control unit carries out overcurrent protection when detecting that output current is excessive, the input of described protected location is connected with the output of described power stage unit, and the output of described protected location is connected with the feedback end of described main control unit;
Current-limiting resistance; one end of described current-limiting resistance is connected with the output of described power stage unit and the input of described protected location simultaneously, and the other end of described current-limiting resistance is that the output of described DC power supply auto-adjusting circuit is connected with the test side of described protected location.
Further, described operation control end comprises: boosting adjustable side, reduction regulation end and default value reset terminal;
Described regulating command comprises: boosting adjustment, reduction regulation and default value recover.
Further, described circuit also comprises:
The display unit of current adjustment state is shown in real time by prompting light, the power end of described display unit is connected with the output of described power conversion unit, at least one drive end of described display unit is connected with the display translation end of described main control unit, and at least one drive end of described display unit is connected with the output of described DC power supply auto-adjusting circuit.
Further, described power conversion unit comprises:
Diode D1, electric capacity C1, electric capacity C2, electric capacity E1, electric capacity E2 and DC-DC power source chip;
The anode of described diode D1 is the input of described power conversion unit, the negative electrode of described diode D1 simultaneously with described electric capacity E2, one end of described electric capacity C1 connects, described electric capacity E2, the other end ground connection simultaneously of described electric capacity C1, the negative electrode of described diode D1 is also connected with the input pin (IN) of described DC-DC power source chip, grounding pin (GND) ground connection of described DC-DC power source chip, the output that the output pin (OUT) of described DC-DC power source chip is described power conversion unit simultaneously with described electric capacity E1, one end of described electric capacity C2 connects, described electric capacity E1, the other end ground connection simultaneously of described electric capacity C2.
Further, described power conversion unit also comprises an interface, and the input of described power conversion unit is by described interface and described DC power supply grafting.
Further, described main control unit comprises:
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R10, resistance R13, resistance R14, resistance R15, resistance R19, resistance R21, resistance R22, electric capacity C3, electric capacity C4, the first switching tube, crystal oscillator, the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and processor;
One end of described resistance R3 is the trigger control end of described main control unit, the other end of described resistance R3 is connected with the control end of described first switching tube and one end of described resistance R4 simultaneously, the output of described first switching tube and the other end of described resistance R4 ground connection simultaneously, the input of described first switching tube is connected with one end of described resistance R1 and one end of described resistance R2 simultaneously, the other end of described resistance R1 is described main control unit feeder ear, the other end of described resistance R2 is by described electric capacity C2 ground connection, the other end of described resistance R2 is also connected with the trigger pin (P0.0/ADC0/INT0) of described processor, the feedback end that the detection pin (P0.1/ADC1/INT1) of described processor is described main control unit, the power pins (VDD) of described processor is that the power end of described main control unit is by described electric capacity C4 ground connection simultaneously, the input end of clock (XIN/P1.0) of described processor is connected with a pole of described crystal oscillator, the output terminal of clock (XOUT/P1.1) of described processor is connected with another pole of described crystal oscillator, the base end ground connection of described crystal oscillator, the reset terminal (RESET/P1.2) of described processor is by described resistance R10 ground connection, multiple data output pins (P2.2 of described processor, P2.3) be multiple display translation ends of described main control unit, described resistance R13, described resistance R14, one end of described resistance R15 is the feeder ear of described main control unit simultaneously, described resistance R13, described resistance R14, the other end of described resistance R15 respectively with described resistance R19, described resistance R21, one end of described resistance R22 connects, described resistance R19, described resistance R21, the other end of described resistance R22 respectively with first of described processor, second, 3rd control inputs pin (P0.5/ADC5, P0.7/ADC7, P2.6/ADC8/CLO) connect, described resistance R13, described resistance R14, the other end of described resistance R15 is also respectively with described first, second, one conduction terminal of the 3rd gate-controlled switch connects, described first, second, another conduction terminal ground connection of 3rd gate-controlled switch, described first, second, the control end of the 3rd gate-controlled switch is multiple operation control ends of described main control unit, the output that the PWM output pin (P0.6/ADC6/PWM) of described processor is described main control unit.
Further, described power stage unit comprises:
Resistance R11, resistance R16, resistance R23, resistance R24, variable resistor R20, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, the first operational amplifier and motor driving IC;
One end of described resistance R23 is the input of described power stage unit, the other end of described resistance R23 is connected with one end of described electric capacity C6 and one end of described resistance R24 simultaneously, the other end ground connection of described electric capacity C6, the other end of described resistance R24 is by described electric capacity C8 ground connection, the other end of described resistance R24 is also connected with the positive input of described first operational amplifier, the reverse input end of described first operational amplifier is connected with one end of described variable resistor R20 and one end of described resistance R16 simultaneously, the other end ground connection of described variable resistor R20, the adjustable side of described variable resistor R20 is connected with the reverse input end of described first operational amplifier, the other end of described resistance R16 is connected with the reference voltage pin (ADJ) of described motor driving IC, the output of described first operational amplifier is by described electric capacity C7 ground connection, the output of described first operational amplifier is also connected with the reference voltage pin (ADJ) of described motor driving IC, the power pins of described first operational amplifier is connected with the input pin (VIN) of described motor driving IC, the output that the output pin (VOUT) of described motor driving IC is described power stage unit is connected with one end of described resistance R11 and described electric capacity C5 simultaneously, described resistance R11 is connected with the output of described first operational amplifier with the other end of described electric capacity C5 simultaneously.
Further, described protected location comprises:
Resistance R6, resistance R7, resistance R8, resistance R9 and the second operational amplifier;
One end of described resistance R6 is the input of described protected location; the other end of described resistance R6 is connected with the positive input of described second operational amplifier; one end of described resistance R9 is the test side of described protected location; the other end of described resistance R9 is connected with the reverse input end of described second operational amplifier and one end of described resistance R8 simultaneously; the other end of described resistance R8 is connected with the output of described second operational amplifier and one end of described resistance R7 simultaneously, and the other end of described resistance R7 is the output of described protected location.
Further, described display unit comprises:
Resistance R17, resistance R18, resistance R23, LED 1, LED 2 and LED 3;
One end of described resistance R17, described resistance R18 is the power end of described display unit simultaneously, the other end of described resistance R17, described resistance R18 is connected with the anode of described LED 1, described LED 2 respectively, the negative electrode of described LED 1, described LED 2 is respectively first, second drive end of described display unit, the anode of described LED 3 is the 3rd drive end of described display unit, and the negative electrode of described LED 3 is by described resistance R23 ground connection.
Another object of the utility model embodiment is, provides a kind of DC power supply automatic regulating equipment adopting above-mentioned DC power supply auto-adjusting circuit.
The utility model embodiment realizes step-up/down adjustment automatically by touching triggering voltage; and automatically power adjustment is stopped after the action executing signal of circuit-under-test being detected; realize one-touch voltage and export adjustment automatically; dramatically saves on human cost; its degree of regulation is high; regulate evenly, fast; output voltage stabilization; substantially increase production efficiency, quality; and in voltage self-regulating process; can also time-out be triggered in target voltage values, stop, starting adjustment at any time, and realize the functions such as overcurrent protection, user-friendly, record.
Accompanying drawing explanation
The structure chart of the DC power supply auto-adjusting circuit that Fig. 1 provides for the utility model embodiment;
The exemplary circuit structure chart of the DC power supply auto-adjusting circuit that Fig. 2 provides for the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each execution mode of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
The utility model embodiment adopts one-touch triggering voltage automatically to realize step-up/down and regulates; and automatically power adjustment is stopped after the executive signal of load being detected; save human cost; its degree of regulation is high; regulate even, quick, output voltage stabilization, improves production efficiency, quality; and can adjustment be suspended, and realize overcurrent protection.
Below in conjunction with specific embodiment, realization of the present utility model is described in detail:
Fig. 1 shows the structure of the DC power supply auto-adjusting circuit that the utility model embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model.
As the utility model one embodiment; the input Vin+ of this DC power supply auto-adjusting circuit is connected with DC power supply DC; output is connected with the control circuit of electronic product, for verifying whether electronic product effectively can realize the defencive function preset under the environment of mains voltage variations.Especially for vehicle electronics product, as car refrigerator, the output of this DC power supply auto-adjusting circuit is connected with the power supply monitoring control board of car refrigerator, the change in voltage of simulated automotive storage battery in the process of discharge and recharge, whether checking power supply monitoring control board effectively can control car refrigerator in the shutdown threshold value preset and start threshold point is opened or turns off, to realize the power consumption stopped when supply power voltage is too low automobile storage battery, and automatically start car refrigerator when automobile storage battery is charged to start threshold value.
This DC power supply auto-adjusting circuit can be applied in any DC power supply automatic regulating equipment, comprising:
DC power supply is converted to the power conversion unit 11 of internal supply voltage, the input of power conversion unit 11 is connected with the output of DC power supply DC;
In the utility model embodiment, external dc electricity is converted to lower stable DC electricity by power conversion unit 11, and as the operating voltage of internal circuit, this operating voltage is generally set as that the most frequently used+5V of circuit or+12V exports.
Generate the main control unit 12 of corresponding PWM regulated voltage signal according to the regulating command of user after receiving Trig control signal, PWM regulated voltage signal is according to the change of default step-length regularity or remain unchanged, the feeder ear of master control power supply is connected with the output of power conversion unit 11, the trigger control end TESTpoint2 of main control unit 12 receives Trig control signal, and main control unit 12 has the operation control end of multiple reception user regulating command;
As the utility model one preferred embodiment, this operation control end comprises: boosting adjustable side, reduction regulation end and default value reset terminal; Regulating command comprises: boosting adjustment, reduction regulation and default value recover.
In the utility model embodiment, controlled by external circuit or user, a Trig control signal is sent as enabled instruction to main control unit 12, main control unit 12 searches for regulating command after receiving Trig control signal, this regulating command is sent by button operation by user, can comprise boosting adjustment, reduction regulation and default value recovery etc.
After main control unit 12 receives reduction regulation instruction, main control unit 12 controls output voltage and progressively raises according to default step-length, such as, after often spending a clock cycle, raise 0.1V;
After main control unit 12 receives boosting regulating command, main control unit 12 controls output voltage progressively to be reduced according to default step-length, such as, after often spending a clock cycle, reduce 0.1V;
This default step-length is the degree of regulation of this DC power supply auto-adjusting circuit, and default step-length is less, and degree of regulation is higher, and the degree of regulation of the utility model embodiment can reach 0.05V.
After main control unit 12 receives the regulating command that default value recovers, main control unit 12 controls output voltage, and to return to default value constant, and this default value is generally a magnitude of voltage between start threshold value and shutdown threshold value.
Herein, main control unit 12 is that the PWM regulated voltage signal by exporting controls output voltage change, can reach the object controlling output voltage change by the duty ratio of the key change PWM regulated voltage signal operating control end.
In voltage self-regulating process, can also again realize suspending at target voltage point, stopping regulating by touching regulating key, and then can again start by tactile identical regulating key, proceed output voltage and regulate.
According to the power stage unit 13 of the corresponding regulation output supply voltage of PWM regulated voltage signal, the input of power stage unit 13 is connected with the output of main control unit 12;
In the utility model embodiment, power stage unit 13 pairs of PWM regulated voltage signals carry out as power stage after filtering, amplifier, voltage stabilizing, according to the supply voltage of the corresponding exporting change of the change of PWM regulated voltage signal.
Control the protected location 14 that main control unit 12 carries out overcurrent protection when detecting that output current is excessive, the input of protected location 14 is connected with the output of power stage unit 13, and the output of protected location 14 is connected with the feedback end of main control unit 12;
In the utility model embodiment; by detecting output current, protected location 14 judges whether this electric current has exceeded the scope of the safe current that self can carry; generate an overcurrent protection control command afterwards in the scope (predetermined current protection threshold value) exceeding safe current and feed back to main control unit 12, main control unit 12 tops out according to overcurrent protection control command control output voltage and controls corresponding over-current protection device and realizes overcurrent protection.
Protected location 14 is also after the control circuit (the power supply monitoring control board of car refrigerator) monitoring electronic product has actuating signal to feed back; report main control unit 12; main control unit 12 controls to stop step-up/down regulatory function (output voltage tops out/reduces); now, protected location 14 detects operating voltage on power supply monitoring control board or break-off voltage.
One end of current-limiting resistance R5, current-limiting resistance R5 is connected with the output of power stage unit 13 and the input of protected location 14 simultaneously, and the other end of current-limiting resistance R5 is that the output VOUT of DC power supply auto-adjusting circuit is connected with the test side of protected location 14.
In the utility model embodiment, it is default default value voltage that DC power supply auto-adjusting circuit gives tacit consent to output voltage after the power-up, now, boosting regulatory function can be triggered by tactile boosting regulating key, or trigger reduction regulation function by touching reduction regulation button, after triggering boosting regulatory function, output voltage raises by presetting step-length regularity automatically, after triggering boosting regulatory function, output voltage reduces by presetting step-length regularity automatically, until after the control circuit (the power supply monitoring control board of car refrigerator) monitoring electronic product by output has actuating signal to feed back, such as power supply monitoring control board exports the signal controlling car refrigerator and start/close after out-put supply reaches start/shutdown threshold value, then stop step-up/down regulatory function (output voltage tops out/reduces), and the operating voltage detected on power supply monitoring control board or break-off voltage.Namely tested load is after setting power values completes corresponding operation (completing this functional verification), output voltage can be stopped to regulate, now can recover button triggering output voltage by tactile default value and be returned to default value, to carry out the next item down functional verification.
The utility model embodiment realizes step-up/down adjustment automatically by touching triggering voltage; and automatically power adjustment is stopped after the action executing signal of circuit-under-test being detected; realize one-touch voltage and export adjustment automatically; dramatically saves on human cost; its degree of regulation is high; regulate evenly, fast; output voltage stabilization; substantially increase production efficiency, quality; and in voltage self-regulating process; can also time-out be triggered in target voltage values, stop, starting adjustment at any time, and realize the functions such as overcurrent protection, user-friendly, record.
Fig. 2 shows the exemplary circuit structure of the DC power supply auto-adjusting circuit that the utility model embodiment provides, and for convenience of explanation, illustrate only the part relevant to the utility model.
As the utility model one embodiment, this DC power supply auto-adjusting circuit can also comprise:
The display unit 15 of current adjustment state is shown in real time by prompting light, the power end of display unit 15 is connected with the output of power conversion unit 11, at least one drive end of display unit 15 is connected with the display translation end of main control unit 12, and at least one drive end of display unit 15 is connected with the output of DC power supply auto-adjusting circuit.
In the utility model embodiment, the function can recovered by the LED correspondence display boosting adjustment of multiple different colours, reduction regulation and default value, such as, when yellow LED lamp is glimmered, representative carries out boosting regulatory function, and output voltage constantly raises, when yellow led stops flicker keeping highlighted, representative boosting regulates and terminates, and output voltage tops out; When green LED lamp is glimmered, representative carries out reduction regulation function, and output voltage constantly declines, and when green LED lamp stops flicker keeping highlighted, represent reduction regulation and terminate, output voltage stops reducing; When red LED is highlighted, the function of default value recovery is being carried out in representative, and it is constant that output voltage remains on default value.
As the utility model one preferred embodiment, this power conversion unit 11 comprises:
Diode D1, electric capacity C1, electric capacity C2, electric capacity E1, electric capacity E2 and DC-DC power source chip U1;
The anode of diode D1 is the input of power conversion unit 11, the negative electrode of diode D1 is connected with one end of electric capacity E2, electric capacity C1 simultaneously, the other end ground connection simultaneously of electric capacity E2, electric capacity C1, the negative electrode of diode D1 is also connected with the input pin (IN) of DC-DC power source chip U1, grounding pin (GND) ground connection of DC-DC power source chip U1, the output that the output pin (OUT) of DC-DC power source chip U1 is power conversion unit 11 is connected with one end of electric capacity E1, electric capacity C2 simultaneously, the other end ground connection simultaneously of electric capacity E1, electric capacity C2.
Preferably, conveniently grafting, power conversion unit 11 can also comprise an interface CN1, and the input of power conversion unit 11 is by interface CN1 and DC power supply DC grafting.
As the utility model one preferred embodiment, main control unit 12 comprises:
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R10, resistance R13, resistance R14, resistance R15, resistance R19, resistance R21, resistance R22, electric capacity C3, electric capacity C4, the first switching tube Q1, crystal oscillator Y1, the first controllable switch S W1, the second controllable switch S W2, the 3rd controllable switch S W3 and processor U3;
One end of resistance R3 is the trigger control end of main control unit 12, the other end of resistance R3 is connected with the control end of the first switching tube Q1 and one end of resistance R4 simultaneously, the output of the first switching tube Q1 and the other end of resistance R4 ground connection simultaneously, the input of the first switching tube Q1 is connected with one end of resistance R1 and one end of resistance R2 simultaneously, the other end of resistance R1 is main control unit 12 feeder ear, the other end of resistance R2 is by electric capacity C2 ground connection, the other end of resistance R2 is also connected with the trigger pin (P0.0/ADC0/INT0) of processor U3, the feedback end that the detection pin (P0.1/ADC1/INT1) of processor U3 is main control unit 12, the power pins (VDD) of processor U3 is that the power end of main control unit 12 is by electric capacity C4 ground connection simultaneously, the input end of clock (XIN/P1.0) of processor U3 is connected with a pole of crystal oscillator Y1, the output terminal of clock (XOUT/P1.1) of processor U3 is connected with another pole of crystal oscillator Y1, the base end ground connection of crystal oscillator Y1, the reset terminal (RESET/P1.2) of processor U3 is by resistance R10 ground connection, multiple data output pins (P2.2 of processor U3, P2.3) be multiple display translation ends of main control unit 12, resistance R13, resistance R14, one end of resistance R15 is the feeder ear of main control unit 12 simultaneously, resistance R13, resistance R14, the other end of resistance R15 respectively with resistance R19, resistance R21, one end of resistance R22 connects, resistance R19, resistance R21, the other end of resistance R22 respectively with first of processor U3, second, 3rd control inputs pin (P0.5/ADC5, P0.7/ADC7, P2.6/ADC8/CLO) connect, resistance R13, resistance R14, the other end of resistance R15 also respectively with the first controllable switch S W1, second controllable switch S W2, one conduction terminal of the 3rd controllable switch S W3 connects, first controllable switch S W1, second controllable switch S W2, another conduction terminal ground connection of 3rd controllable switch S W3, first controllable switch S W1, second controllable switch S W2, the control end of the 3rd controllable switch S W3 is multiple operation control ends of main control unit 12, the output that the PWM output pin (P0.6/ADC6/PWM) of processor U3 is main control unit 12.
Preferably, key switch or touch switch can be selected as gate-controlled switch, user is by the regulating command of touch key input correspondence.
As the utility model one preferred embodiment, power stage unit 13 comprises:
Resistance R11, resistance R16, resistance R23, resistance R24, variable resistor R20, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, the first operational amplifier U2A and motor driving IC U4;
One end of resistance R23 is the input of power stage unit 13, the other end of resistance R23 is connected with one end of electric capacity C6 and one end of resistance R24 simultaneously, the other end ground connection of electric capacity C6, the other end of resistance R24 is by electric capacity C8 ground connection, the other end of resistance R24 is also connected with the positive input of the first operational amplifier U2A, the reverse input end of the first operational amplifier U2A is connected with one end of variable resistor R20 and one end of resistance R16 simultaneously, the other end ground connection of variable resistor R20, the adjustable side of variable resistor R20 is connected with the reverse input end of the first operational amplifier U2A, the other end of resistance R16 is connected with the reference voltage pin (ADJ) of motor driving IC U4, the output of the first operational amplifier U2A is by electric capacity C7 ground connection, the output of the first operational amplifier U2A is also connected with the reference voltage pin (ADJ) of motor driving IC U4, the power pins of the first operational amplifier U2A is connected with the input pin (VIN) of motor driving IC U4, the output that the output pin (VOUT) of motor driving IC U4 is power stage unit 13 is connected with one end of resistance R11 and electric capacity C5 simultaneously, resistance R11 is connected with the output of the first operational amplifier U2A with the other end of electric capacity C5 simultaneously.
Preferably, motor driving IC U4 can adopt the motor driving IC of LM317L model.
In the utility model embodiment, PWM regulated voltage signal carries out initial voltage stabilizing by two-stage high-pass filter, then is amplified by operational amplifier, and then by ADJ voltage-stabilizing device (motor driving IC), power exports.
As the utility model one preferred embodiment, protected location 14 comprises:
Resistance R6, resistance R7, resistance R8, resistance R9 and the second operational amplifier U2B;
One end of resistance R6 is the input of protected location 14; the other end of resistance R6 is connected with the positive input of the second operational amplifier U2B; one end of resistance R9 is the test side of protected location 14; the other end of resistance R9 is connected with the reverse input end of the second operational amplifier U2B and one end of resistance R8 simultaneously; the other end of resistance R8 is connected with the output of the second operational amplifier U2B and one end of resistance R7 simultaneously, and the other end of resistance R7 is the output of protected location 14.
As the utility model one preferred embodiment, display unit 15 comprises:
Resistance R17, resistance R18, resistance R23, LED 1, LED 2 and LED 3;
One end of resistance R17, resistance R18 is the power end of display unit 15 simultaneously, the other end of resistance R17, resistance R18 is connected with the anode of LED 1, LED 2 respectively, the negative electrode of LED 1, LED 2 is respectively first, second drive end of display unit 15, the anode of LED 3 is the 3rd drive end of display unit 15, and the negative electrode of LED 3 is by resistance R23 ground connection.
Function declaration:
It is default default value voltage that the DC power supply auto-adjusting circuit that the utility model embodiment provides gives tacit consent to output voltage after the power-up, now, boosting regulatory function is triggered by touching boosting regulating key, output voltage raises by presetting step-length regularity automatically, until after the control circuit (the power supply monitoring control board of car refrigerator) monitoring electronic product by output has actuating signal to feed back, such as power supply monitoring control board exports the signal controlling car refrigerator and start after out-put supply reaches start threshold value, stop boosting regulatory function (output voltage tops out), and the operating voltage detected on power supply monitoring control board,
If after the power-up by touching reduction regulation button, then trigger reduction regulation function, output voltage reduces by presetting step-length regularity automatically, until after the control circuit (the power supply monitoring control board of car refrigerator) monitoring electronic product by output has actuating signal to feed back, such as power supply monitoring control board exports the signal controlling car refrigerator and close after out-put supply reaches shutdown threshold value, then stop reduction regulation function (output voltage stops reducing), and detect the break-off voltage on power supply monitoring control board;
That is, when tested load is after setting power values performs corresponding operation, just complete this functional verification, output voltage now can be stopped to regulate, terminate this checking, now can recover button triggering output voltage by tactile default value and be returned to default value, carry out the next item down functional verification.
Another object of the utility model embodiment is, provides a kind of DC power supply automatic regulating equipment adopting above-mentioned DC power supply auto-adjusting circuit.
The utility model embodiment realizes step-up/down adjustment automatically by touching triggering voltage; and automatically power adjustment is stopped after the action executing signal of circuit-under-test being detected; realize one-touch voltage and export adjustment automatically; dramatically saves on human cost; its degree of regulation is high; regulate evenly, fast; output voltage stabilization; substantially increase production efficiency, quality; and in voltage self-regulating process; can also time-out be triggered in target voltage values, stop, starting adjustment at any time, and there is the functions such as overcurrent protection, user-friendly, record.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a DC power supply auto-adjusting circuit, is connected with DC power supply, it is characterized in that, described circuit comprises:
DC power supply is converted to the power conversion unit of internal supply voltage, the input of described power conversion unit is connected with the output of described DC power supply;
Generate the main control unit of corresponding PWM regulated voltage signal according to the regulating command of user after receiving Trig control signal, described PWM regulated voltage signal is according to the change of default step-length regularity or remain unchanged, the feeder ear of described master control power supply is connected with the output of described power conversion unit, the trigger control end of described main control unit receives Trig control signal, and described main control unit has the operation control end of multiple reception user regulating command;
According to the power stage unit of the corresponding regulation output supply voltage of described PWM regulated voltage signal, the input of described power stage unit is connected with the output of described main control unit;
Control the protected location that described main control unit carries out overcurrent protection when detecting that output current is excessive, the input of described protected location is connected with the output of described power stage unit, and the output of described protected location is connected with the feedback end of described main control unit;
Current-limiting resistance; one end of described current-limiting resistance is connected with the output of described power stage unit and the input of described protected location simultaneously, and the other end of described current-limiting resistance is that the output of described DC power supply auto-adjusting circuit is connected with the test side of described protected location.
2. circuit as claimed in claim 1, it is characterized in that, described operation control end comprises: boosting adjustable side, reduction regulation end and default value reset terminal;
Described regulating command comprises: boosting adjustment, reduction regulation and default value recover.
3. circuit as claimed in claim 1, it is characterized in that, described circuit also comprises:
The display unit of current adjustment state is shown in real time by prompting light, the power end of described display unit is connected with the output of described power conversion unit, at least one drive end of described display unit is connected with the display translation end of described main control unit, and at least one drive end of described display unit is connected with the output of described DC power supply auto-adjusting circuit.
4. circuit as claimed in claim 1, it is characterized in that, described power conversion unit comprises:
Diode D1, electric capacity C1, electric capacity C2, electric capacity E1, electric capacity E2 and DC-DC power source chip;
The anode of described diode D1 is the input of described power conversion unit, the negative electrode of described diode D1 simultaneously with described electric capacity E2, one end of described electric capacity C1 connects, described electric capacity E2, the other end ground connection simultaneously of described electric capacity C1, the negative electrode of described diode D1 is also connected with the input pin IN of described DC-DC power source chip, the grounding pin GND ground connection of described DC-DC power source chip, with described electric capacity E1 while that the output pin OUT of described DC-DC power source chip being the output of described power conversion unit, one end of described electric capacity C2 connects, described electric capacity E1, the other end ground connection simultaneously of described electric capacity C2.
5. circuit as claimed in claim 4, it is characterized in that, described power conversion unit also comprises an interface, and the input of described power conversion unit is by described interface and described DC power supply grafting.
6. circuit as claimed in claim 1, it is characterized in that, described main control unit comprises:
Resistance R1, resistance R2, resistance R3, resistance R4, resistance R10, resistance R13, resistance R14, resistance R15, resistance R19, resistance R21, resistance R22, electric capacity C3, electric capacity C4, the first switching tube, crystal oscillator, the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and processor;
One end of described resistance R3 is the trigger control end of described main control unit, the other end of described resistance R3 is connected with the control end of described first switching tube and one end of described resistance R4 simultaneously, the output of described first switching tube and the other end of described resistance R4 ground connection simultaneously, the input of described first switching tube is connected with one end of described resistance R1 and one end of described resistance R2 simultaneously, the other end of described resistance R1 is described main control unit feeder ear, the other end of described resistance R2 is by described electric capacity C2 ground connection, the other end of described resistance R2 is also connected with the trigger pin P0.0/ADC0/INT0 of described processor, the detection pin P0.1/ADC1/INT1 of described processor is the feedback end of described main control unit, the power pins VDD of described processor is that the power end of described main control unit is by described electric capacity C4 ground connection simultaneously, the input end of clock XIN/P1.0 of described processor is connected with a pole of described crystal oscillator, the output terminal of clock XOUT/P1.1 of described processor is connected with another pole of described crystal oscillator, the base end ground connection of described crystal oscillator, the reset terminal RESET/P1.2 of described processor is by described resistance R10 ground connection, multiple data output pins P2.2 of described processor, P2.3 is multiple display translation ends of described main control unit, described resistance R13, described resistance R14, one end of described resistance R15 is the feeder ear of described main control unit simultaneously, described resistance R13, described resistance R14, the other end of described resistance R15 respectively with described resistance R19, described resistance R21, one end of described resistance R22 connects, described resistance R19, described resistance R21, the other end of described resistance R22 respectively with first of described processor, second, 3rd control inputs pin P0.5/ADC5, P0.7/ADC7, P2.6/ADC8/CLO connects, described resistance R13, described resistance R14, the other end of described resistance R15 is also respectively with described first, second, one conduction terminal of the 3rd gate-controlled switch connects, described first, second, another conduction terminal ground connection of 3rd gate-controlled switch, described first, second, the control end of the 3rd gate-controlled switch is multiple operation control ends of described main control unit, the PWM output pin P0.6/ADC6/PWM of described processor is the output of described main control unit.
7. circuit as claimed in claim 1, it is characterized in that, described power stage unit comprises:
Resistance R11, resistance R16, resistance R23, resistance R24, variable resistor R20, electric capacity C5, electric capacity C6, electric capacity C7, electric capacity C8, the first operational amplifier and motor driving IC;
One end of described resistance R23 is the input of described power stage unit, the other end of described resistance R23 is connected with one end of described electric capacity C6 and one end of described resistance R24 simultaneously, the other end ground connection of described electric capacity C6, the other end of described resistance R24 is by described electric capacity C8 ground connection, the other end of described resistance R24 is also connected with the positive input of described first operational amplifier, the reverse input end of described first operational amplifier is connected with one end of described variable resistor R20 and one end of described resistance R16 simultaneously, the other end ground connection of described variable resistor R20, the adjustable side of described variable resistor R20 is connected with the reverse input end of described first operational amplifier, the other end of described resistance R16 is connected with the reference voltage pin ADJ of described motor driving IC, the output of described first operational amplifier is by described electric capacity C7 ground connection, the output of described first operational amplifier is also connected with the reference voltage pin ADJ of described motor driving IC, the power pins of described first operational amplifier is connected with the input pin VIN of described motor driving IC, the output pin VOUT of described motor driving IC is connected with one end of described resistance R11 and described electric capacity C5 while of being the output of described power stage unit, described resistance R11 is connected with the output of described first operational amplifier with the other end of described electric capacity C5 simultaneously.
8. circuit as claimed in claim 1, it is characterized in that, described protected location comprises:
Resistance R6, resistance R7, resistance R8, resistance R9 and the second operational amplifier;
One end of described resistance R6 is the input of described protected location; the other end of described resistance R6 is connected with the positive input of described second operational amplifier; one end of described resistance R9 is the test side of described protected location; the other end of described resistance R9 is connected with the reverse input end of described second operational amplifier and one end of described resistance R8 simultaneously; the other end of described resistance R8 is connected with the output of described second operational amplifier and one end of described resistance R7 simultaneously, and the other end of described resistance R7 is the output of described protected location.
9. circuit as claimed in claim 3, it is characterized in that, described display unit comprises:
Resistance R17, resistance R18, resistance R23, LED 1, LED 2 and LED 3;
One end of described resistance R17, described resistance R18 is the power end of described display unit simultaneously, the other end of described resistance R17, described resistance R18 is connected with the anode of described LED 1, described LED 2 respectively, the negative electrode of described LED 1, described LED 2 is respectively first, second drive end of described display unit, the anode of described LED 3 is the 3rd drive end of described display unit, and the negative electrode of described LED 3 is by described resistance R23 ground connection.
10. a DC power supply automatic regulating equipment, is characterized in that, described device comprises the DC power supply auto-adjusting circuit as described in any one of claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520481628.8U CN204928578U (en) | 2015-07-06 | 2015-07-06 | DC power supply auto -adjusting circuit and DC power supply automatic regulating apparatus |
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| CN201520481628.8U CN204928578U (en) | 2015-07-06 | 2015-07-06 | DC power supply auto -adjusting circuit and DC power supply automatic regulating apparatus |
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| CN204928578U true CN204928578U (en) | 2015-12-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510469A (en) * | 2019-01-15 | 2019-03-22 | 广东志成冠军集团有限公司 | A kind of the DC power supply self-start circuit and starting method of high voltage input and low-voltage output |
| CN111585421A (en) * | 2020-05-28 | 2020-08-25 | 陕西工业职业技术学院 | Light-duty switching power supply with variable voltage output and low switching loss |
-
2015
- 2015-07-06 CN CN201520481628.8U patent/CN204928578U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510469A (en) * | 2019-01-15 | 2019-03-22 | 广东志成冠军集团有限公司 | A kind of the DC power supply self-start circuit and starting method of high voltage input and low-voltage output |
| CN109510469B (en) * | 2019-01-15 | 2023-10-03 | 广东志成冠军集团有限公司 | High-voltage input low-voltage output direct current power source starting circuit and starting method |
| CN111585421A (en) * | 2020-05-28 | 2020-08-25 | 陕西工业职业技术学院 | Light-duty switching power supply with variable voltage output and low switching loss |
| CN111585421B (en) * | 2020-05-28 | 2023-08-04 | 陕西工业职业技术学院 | Light switching power supply with variable voltage output and low switching loss |
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Address after: Nanshan District Xili street Shahe road 518000 Shenzhen City, Guangdong province No. 3151 emerging industrial park building A 404-1 Patentee after: Shenzhen Zhenbang intelligent Polytron Technologies Inc Address before: 518000, Guangdong, Nanshan District, Taoyuan street, Longjing second industrial zone, A building, 2 floor, A building, 3 building, north, B building, 3 floor, B building, 6 floor, building C, building 3, Shenzhen Patentee before: SHENZHEN ZHENBANG INTELLIGENT TECHNOLOGY CO., LTD. |