CN112631357A - DC voltage-stabilized power supply circuit - Google Patents
DC voltage-stabilized power supply circuit Download PDFInfo
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- CN112631357A CN112631357A CN202011532683.7A CN202011532683A CN112631357A CN 112631357 A CN112631357 A CN 112631357A CN 202011532683 A CN202011532683 A CN 202011532683A CN 112631357 A CN112631357 A CN 112631357A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
Abstract
The invention provides a direct-current stabilized voltage supply circuit which comprises a first switch module, a second switch module, a primary stabilized voltage module and a linear voltage reduction module, wherein the first switch module is used for being switched on or switched off according to the states of a control signal and an enabling signal; the second switch module is used for conducting when the first switch module is conducted; the primary voltage stabilizing module is used for stabilizing the voltage output by the battery to obtain a first voltage; the linear voltage reduction module is used for reducing the first voltage and then outputting a second voltage. The circuit is switched on and off through the switching characteristic of the first switching module, so that the controllability and the low power consumption characteristic of the first switching module are realized, the high voltage withstanding characteristic is realized through the primary voltage stabilizing module, the low static power consumption and large current on-load function are realized through the primary voltage stabilizing module, and the non-radiation function is realized through the linear voltage reduction function of the linear voltage reduction module.
Description
Technical Field
The invention relates to the technical field of voltage stabilizing circuits, in particular to a direct-current voltage stabilizing power supply circuit.
Background
With the development of new energy industry, the number of strings of the lithium ion battery BMS is higher and higher, and the voltage is also higher and higher; meanwhile, along with the visualization and intelligent requirements of the market on the information of the lithium ion battery, intelligent control units such as an MCU (microprogrammed control unit) need to be added to the BMS, and the units need to be provided with proper high-voltage-resistant voltage stabilizing circuits. Meanwhile, with the national emphasis on energy conservation and emission reduction, low carbon and environmental protection and the requirement of BMS (battery management system) on static power consumption reduction and the prolonging of the service time of the lithium ion battery in the lithium ion battery industry, the design of a low-power-consumption voltage-stabilized power supply circuit in the BMS becomes a key. The unit power supply voltage-stabilized power supply circuit commonly used in the market at present is mainly a DC-DC voltage-reducing circuit, and generally consists of a DC-DC voltage-reducing IC chip, an inductor and other elements, but the voltage-reducing circuit has the defects of high output switch noise, high power consumption, large radiation, low input withstand voltage, high cost and the like.
Disclosure of Invention
The invention aims to provide a direct-current stabilized power supply circuit, which solves the problems of high switching noise, high power consumption, high radiation, low input withstand voltage and high cost of a DC-DC voltage reduction circuit adopted by a stabilized power supply circuit in the prior art.
A first aspect of an embodiment of the present invention provides a dc voltage-stabilized power supply circuit, including:
the control end of the first switch module is connected with the control signal and the enable signal, and the output end of the first switch module is grounded and used for being switched on or switched off according to the states of the control signal and the enable signal;
the control end of the second switch module is connected with the input end of the first switch module, and the input end of the second switch module is connected with the output end of the battery and is used for being conducted when the first switch module is conducted;
a first input end of the primary voltage stabilizing module is connected with the output end of the second switch module and is used for stabilizing the voltage output by the battery to obtain a first voltage;
and the input end of the linear voltage reduction module is connected with the output end of the primary voltage stabilization module and is used for reducing the first voltage and then outputting a second voltage.
The invention provides a direct-current stabilized voltage supply circuit which comprises a first switch module, a second switch module, a primary stabilized voltage module and a linear voltage reduction module, wherein the first switch module is used for being switched on or switched off according to the states of a control signal and an enabling signal; the second switch module is used for conducting when the first switch module is conducted; the primary voltage stabilizing module is used for stabilizing the voltage output by the battery to obtain a first voltage; the linear voltage reduction module is used for reducing the first voltage and then outputting a second voltage. The invention realizes the on-off of the circuit through the switching characteristic of the first switch module and the IO port of the MCU and the enabling signal of the external equipment, thereby realizing the controllable and low power consumption characteristic of the first switch module, realizing the high voltage withstanding characteristic through the voltage division and current limiting of the resistor in the primary voltage stabilizing module and the voltage stabilizing function of the voltage stabilizing diode, realizing the functions of low static power consumption and large current with load through the voltage division and current limiting of the resistor in the primary voltage stabilizing module and the current amplification function of the triode, realizing the non-radiation function through the linear voltage reduction function of the linear voltage reduction module and no switching element, and solving the problems of large switching noise, high power consumption, large radiation, low input voltage withstanding and high cost of the DC-DC voltage reduction circuit adopted by the voltage stabilizing power circuit in the prior art.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a dc voltage-stabilized power supply circuit according to a first embodiment of the present invention;
fig. 2 is another schematic structural diagram of a dc regulated power supply circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a dc regulated power supply circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
An embodiment of the present invention provides a dc regulated power supply circuit, as shown in fig. 1, the dc regulated power supply circuit includes:
a first switch module 101, a control end of which is connected to the control signal and the enable signal, and an output end of which is grounded, and is used for being turned on or off according to states of the control signal and the enable signal;
a control end of the second switch module 102 is connected to an input end of the first switch module 101, and an input end of the second switch module is connected to an output end of the battery, and is used for conducting when the first switch module 101 is conducted;
a primary voltage stabilizing module 103, a first input end of which is connected to the output end of the second switch module 102, for stabilizing the voltage output by the battery to obtain a first voltage;
and an input end of the linear voltage reduction module 104 is connected to an output end of the primary voltage stabilization module 103, and is configured to reduce the first voltage and output a second voltage.
The control end of the first switch module 101 inputs a control signal and an enable signal, and enters an on state or an off state according to the level states of the control signal and the enable signal, when the control signal and the enable signal are both high levels, the first switch module 101 is turned on with the ground, and when the control signal and the enable signal are both low levels, the second switch module 102 is turned off with the ground. The first switch module 101 may be formed by a transistor, a resistor, a capacitor, and the like, and the base of the transistor is controlled by the control signal and the enable signal to control the on/off of the entire first switch module.
The second switch module 102 is connected to the battery, when the first switch module 101 is turned on, the control terminal of the second switch module 102 is grounded, and at this time, the second switch module 102 is turned on and outputs the battery voltage.
The primary voltage stabilizing module 103 is configured to stabilize the voltage output by the battery to obtain a first voltage, and may form a voltage stabilizing circuit through a transistor and a voltage stabilizer.
As an implementation manner, the primary voltage stabilizing module 103 includes a first switch tube, a second switch tube, a first voltage regulator tube and a second voltage regulator tube, a collector of the first switch tube is connected to a cathode of the first voltage regulator tube, a base of the first switch tube and a collector of the second switch tube, and constitutes an input end of the primary voltage stabilizing module 103, an emission set of the first switch tube is connected to a base of the second switch tube, an emission set of the second switch tube is connected to a cathode of the second voltage regulator tube, and constitutes an output end of the primary voltage stabilizing module 103, and an anode of the first voltage regulator tube and a cathode of the second voltage regulator tube are connected to ground in common.
When voltage is input to the input end of the primary voltage stabilizing module 103, the first voltage stabilizing tube works to form voltage stabilization, the first switch tube and the second switch tube are conducted along with the rise of the voltage of the first voltage stabilizing tube, the second voltage stabilizing tube forms voltage stabilization to output, and the primary voltage stabilizing module 103 in the embodiment realizes voltage stabilization and then output of the input voltage through the voltage stabilizing tubes and the switch tubes.
The linear voltage-reducing module 104 is configured to reduce the first voltage and then output a second voltage, and the linear voltage-reducing module 104 may include a linear voltage-reducing chip and a capacitor, and reduces the first voltage output by the primary voltage-stabilizing module 103 and then outputs the first voltage.
The working process of the embodiment is as follows: when the control signal and the enable signal are both high-level signals, the first switch module 101 is turned on, the second switch module 102 is turned on, the battery outputs voltage through the second switch module 102, the primary voltage stabilization module 103 stabilizes the voltage output by the battery to obtain a first voltage, and the linear voltage reduction module 104 reduces the voltage of the first voltage and outputs a second voltage.
The embodiment of the invention provides a direct-current stabilized power supply circuit, which comprises a first switch module 101, a second switch module 102, a primary stabilized voltage module 103 and a linear voltage reduction module 104, wherein the first switch module 101 is used for being switched on or switched off according to the states of a control signal and an enable signal; the second switch module 102 is configured to be turned on when the first switch module 101 is turned on; the primary voltage stabilizing module 103 is used for stabilizing the voltage output by the battery to obtain a first voltage; the linear voltage reduction module 104 is configured to reduce the first voltage and output a second voltage. The invention realizes the on-off of the circuit through the switching characteristic of the first switch module 101 and the IO port of the MCU and the enabling signal of the external equipment, thereby realizing the controllable and low power consumption characteristic of the first switch module 101, realizing the high voltage-withstanding characteristic through the voltage division and current limiting of the resistor in the primary voltage-stabilizing module 103 and the voltage-stabilizing function of the voltage-stabilizing diode, realizing the low static power consumption and large current loading function through the voltage division and current limiting of the resistor in the primary voltage-stabilizing module 103 and the current amplification function of the triode, realizing the non-radiation function through the linear voltage-reducing function of the linear voltage-reducing module 104 and no switching element, and solving the problems of large switching noise, high power consumption, large radiation, low input voltage-withstanding and high cost of the DC-DC voltage-reducing circuit adopted by the voltage-stabilizing power supply circuit in.
In one embodiment, as shown in fig. 2, the dc regulated power supply circuit further includes a charging module 105, an input terminal of the charging module 105 is connected to the charger 106, an output terminal of the charging module 105 is connected to the second input terminal of the primary voltage regulation module 103, and the charger 106 outputs a charging voltage to the dc regulated power supply circuit through the charging module 105.
The charging module 105 is connected to the charger 106, so that the charger 106 outputs a charging voltage to the dc regulated power supply circuit through the charging module 105, and the charging module 105 may be formed of a diode, thereby preventing the charger 106 from being damaged due to reverse output of current.
The working process of the embodiment is as follows: when the control signal and the enable signal are both low level signals, the charger 106 outputs a voltage through the charging module 105, the primary voltage stabilizing module 103 stabilizes the voltage output by the charging module 105 to obtain a first voltage, and the linear voltage reducing module 104 reduces the first voltage and outputs a second voltage.
When the control signal and the enable signal are both low level signals and the charging module 105 does not output voltage, the dc voltage-stabilized power supply circuit stops working.
In this embodiment, the charging module 105 is connected to the primary voltage stabilizing module 103, so that the charger 106 can directly output a charging voltage to the dc voltage stabilizing power supply circuit.
The following describes embodiments of the present invention with specific circuit configurations:
as shown in fig. 3, the dc regulated power supply circuit includes a first switch module 101, a second switch module 102, a primary regulator module 103, and a linear buck module 104, where the first switch module 101 includes a diode DP10, a diode DP13, a resistor RP12, a resistor RP13, a resistor RP16, a resistor RP17, a capacitor CP1, and a transistor QP4, a first end of the resistor RP16 is an output end of the first switch module 101, a second end of the resistor RP16 is connected to a collector of the transistor QP4, a base of the transistor QP4 is connected to a first end of the resistor RP17, a first end of the capacitor CP1, a cathode of the diode DP10, and a cathode of the diode DP13, an emitter-collector of the transistor QP4 is connected to a second end of the resistor RP17 and a second end of the capacitor CP1 in parallel connection to ground, an anode of the diode DP10 is connected to a first end of the resistor RP13, a second end of the resistor RP13 is a first control terminal of the first switch module 101, and a first control terminal is input control, an anode of the diode DP13 is connected to a first terminal of the resistor RP12, a second terminal of the resistor RP12 is a second control terminal of the first switch module 101, and the external device enable signal UR _ RX _ Wake is input to the second control terminal.
The second switch module 102 includes a diode DP5, a diode DP6, a resistor RP15, and a transistor QP1, wherein an emitter of the transistor QP1 is an output terminal of the second switch module 102, a collector of the transistor QP1 is connected to a first terminal of a resistor RP15, a cathode of the diode DP5, and a cathode of the diode DP6, an anode of the diode DP5 is a first input terminal B + of the second switch module 102, and an anode of the diode DP6 is a second input terminal B16+ of the second switch module 102.
The primary voltage stabilization module 103 comprises a current limiting device PTC1, a resistor RP3, a resistor RP4, a resistor RP5, a resistor RP6, a resistor RP7, a transistor QP2, a transistor QP3, a regulator ZP1 and a regulator ZP2, wherein a second end of the current limiting device PTC 2 is an input end of the primary voltage stabilization module 103, a first end of the current limiting device PTC 2 is connected to a first end of the resistor RP 2, a second end of the resistor RP 2 is connected to a base of the transistor QP2 and a cathode of the regulator ZP2, a collector of the transistor QP2 is connected to a second end of the resistor RP 2, a second end of the resistor RP 2 and a second end of the resistor RP 2, a collector of the transistor QP2 is connected to a second end of the resistor RP 2, a cathode of the emitter ZP2 is connected to the transistor RP 2, and the regulator ZP2, the cathode of the transistor RP 2 is connected to the regulator ZP2, the anode of the voltage-regulator tube ZP1 and the anode of the voltage-regulator tube ZP2 are connected to ground.
The charging module 105 comprises a diode DP3 and a diode DP4, the anode of the diode DP3 being connected to the anode of the diode DP4 and constituting the input CH + of the charging module 105, and the cathode of the diode DP3 being connected to the cathode of the diode DP4 and constituting the output of the charging module 105.
The linear buck module 104 includes a capacitor CP, a resistor RP, a diode DP, a diode LED, a diode TVS, and a linear regulator LDO, the linear regulator LDO is a chip ME6239, a first end of the capacitor CP is connected to a first end of the capacitor CP, an anode of the diode LED, a first end of the resistor RP, a cathode of the diode LED, a second end of the diode LED is connected to a first end of the resistor RP, a second end of the resistor RP, a first end of the capacitor CP, a cathode of the diode DP, and an input end of the linear regulator LDO, an anode of the diode DP is connected to an output end of the linear regulator LDO, a first end of the capacitor CP, a cathode of the diode TVS, and, the second terminal of the capacitor CP2, the second terminal of the capacitor CP3, the second terminal of the capacitor CP4, the second terminal of the capacitor CP5, the second terminal of the capacitor CP6, the second terminal of the capacitor CP7, the second terminal of the capacitor CP8, the anode of the diode TVS7, and the ground terminal of the linear regulator LDO1 are commonly connected to ground.
The DC stabilized voltage power supply circuit has 3 working states:
1. and (3) power supply state: when the IO port control signal of the MCU: MCU _ LDO _ EN or external device enable signal: UR _ RX _ Wake, when the level of these 2 signals is high, the high level signal (MCU _ LDO _ EN ═ 1) reaches the 1 st pin (base) of the NPN switching transistor QP4 through the resistor RP13 and the diode DP10 (or the high level signal UR _ RX _ Wake through the resistor RP12 and the diode DP13), the NPN switching transistor QP4 is turned on, the 3 rd pin (collector) of the NPN switching transistor QP4 is low, then the 2 nd pin of the resistor RP16 connected to the 3 rd pin of the NPN switching transistor QP4 is pulled low, so that the 1 st pin of the PNP transistor QP1 connected to the 1 st pin of the resistor RP16 is pulled low, the PNP transistor QP1 is turned on, the B +/B16+ voltage output from the battery reaches the current dividing and limiting resistor RP7, the high voltage is stabilized by the ZP voltage diode connected to the 2 nd pin of the 7, and reaches the ZP 4612, and the ZP 4612 th pin of the NPN diode QP2, the base current of the NPN triode QP2 is amplified and then transmitted to the 1 st pin (base) of the NPN triode QP3 connected with the 3 rd pin (emitter), the base current of the NPN triode QP3 is amplified again and then reaches the 2 nd pin of the LDO element LDO1 through the voltage-dividing current-limiting resistors RP9 and RP10, the filter capacitors CP4 and CP5 after passing through the voltage-dividing current-limiting resistor ZP2 and the filter capacitors CP2 and CP3 connected with the 3 rd pin (emitter), the LDO1 converts the voltage into the stable voltage of 3.3V and outputs the stable voltage from the 3 rd pin, and the 3.3V is provided for external system components such as the MCU after passing through the filter capacitors CP6, CP7, CP8 and the ESD element TVS7 for use.
2. The non-operating state is as follows: when the IO port control signal of the MCU: MCU _ LDO _ EN or external device enable signal: UR _ RX _ Wake, when the level of these 2 signals is low and no voltage is input from the external charger 106 (CH + ═ 0), the entire circuit does not operate, and the power consumption is 0 uA.
3. The charging state is as follows: when the IO port control signal of the MCU: MCU _ LDO _ EN or external device enable signal: UR RX Wake, the level of these 2 signals is low, CH + is high, the CH + voltage reaches a voltage dividing and current limiting resistor RP7 through diodes DP3 and DP4, the high voltage is stabilized to 12V by a voltage stabilizing diode ZP1 connected with the 2 nd pin of RP7, meanwhile, the 12V voltage reaches a 1 st pin (base) of an NPN triode QP2 connected with the cathode of the ZP1, a base current is amplified by an NPN triode QP2 and then transmitted to a 1 st pin (base) of an NPN triode QP3 connected with a 3 rd pin (emitter), the base current is amplified again by the NPN triode QP3 and then reaches a 2 nd pin of the LDO1 through a voltage regulator ZP2 and filter capacitors CP2 and CP3 connected with the 3 rd pin (emitter), and then passes through voltage dividing and current limiting resistors RP9 and RP10, filter capacitors CP4 and CP5, the LDO1 converts the voltage into a stable voltage of 3.3V and outputs the stable voltage from the 3 rd pin, and the stable voltage of 3.3V passes through the filter capacitors CP6, CP7, CP8 and ESD TVS7 and then is provided for external system components such as an MCU.
The technical effects of the direct current stabilized voltage power supply circuit are as follows: the invention utilizes the switching characteristic of a triode QP4 in a first switching module and the IO port of an MCU and an enable signal of external equipment to realize the on-off of the circuit, thereby realizing the controllability and the low power consumption characteristic of a direct current stabilized power supply circuit, and also utilizes the voltage division and current limiting of resistors RP3 to RP7 and the voltage stabilizing function of a Zener diode ZP1 in a primary voltage stabilizing module to realize the high voltage resistance characteristic, and also utilizes the voltage division and current limiting of resistors RP3 to RP7 and the current amplification function of the triodes QP2 and QP3 to realize the low static power consumption and large current loading functions, and also utilizes the linear voltage reduction function of a linear equipment LDO1 without a switching element, thereby realizing the non-radiation function.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications, which are equivalent in performance or use, without departing from the inventive concept, should be considered as falling within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A DC regulated power supply circuit, comprising:
the control end of the first switch module is connected with the control signal and the enable signal, and the output end of the first switch module is grounded and used for being switched on or switched off according to the states of the control signal and the enable signal;
the control end of the second switch module is connected with the input end of the first switch module, and the input end of the second switch module is connected with the output end of the battery and is used for being conducted when the first switch module is conducted;
a first input end of the primary voltage stabilizing module is connected with the output end of the second switch module and is used for stabilizing the voltage output by the battery to obtain a first voltage;
and the input end of the linear voltage reduction module is connected with the output end of the primary voltage stabilization module and is used for reducing the first voltage and then outputting a second voltage.
2. The dc regulated power supply circuit of claim 1, wherein when the control signal and the enable signal are both high signals, the first switching module is turned on, the second switching module is turned on, the battery outputs a voltage through the second switching module, the primary voltage regulation module regulates a voltage output by the battery to obtain a first voltage, and the linear voltage reduction module reduces the first voltage and outputs a second voltage.
3. The regulated dc power supply circuit of claim 1 further comprising a charging module having an input connected to a charger and an output connected to the second input of the primary regulator module, wherein the charger outputs a charging voltage to the regulated dc power supply circuit via the charging module.
4. The dc regulated power supply circuit of claim 3, wherein when the control signal and the enable signal are both low signals, the charger outputs a voltage through the charging module, the primary voltage regulation module regulates the voltage output by the charging module to obtain a first voltage, and the linear voltage reduction module reduces the first voltage to output a second voltage.
5. The regulated dc power supply circuit of claim 3, wherein the regulated dc power supply circuit stops operating when the control signal and the enable signal are both low signals and the charging module is not outputting voltage.
6. The regulated dc power supply circuit of claim 1 wherein the first switch module includes a diode DP10, a diode DP13, a resistor RP12, a resistor RP13, a resistor RP16, a resistor RP17, a capacitor CP1, and a transistor QP4, a first terminal of the resistor RP16 is an output terminal of the first switch module, a second terminal of the resistor RP16 is a collector of the transistor QP4, a base of the transistor QP4 is connected to a first terminal of the resistor RP17, a first terminal of the capacitor CP1, a cathode of the diode DP10, and a cathode of the diode DP13, an emission set of the transistor QP4 is connected to ground with a second terminal of the resistor RP17 and a second terminal of the capacitor CP1, an anode of the diode DP10 is connected to the first terminal of the resistor RP13, a second terminal of the resistor RP13 is a first control terminal of the first switch module, an anode of the diode RP13 is connected to a first terminal of the resistor DP 12, a second terminal of the resistor RP12 is a second control terminal of the first switch module.
7. The dc regulated power supply circuit of claim 1 wherein the second switching block includes a diode DP5, a diode DP6, a resistor RP15, and a transistor QP1, wherein an emitter of the transistor QP1 is an output of the second switching block, a collector of the transistor QP1 is connected to a first terminal of the resistor RP15, a cathode of the diode DP5, and a cathode of the diode DP6, an anode of the diode DP5 is a first input of the second switching block, and an anode of the diode DP6 is a second input of the second switching block.
8. The dc regulated power supply circuit of claim 1 wherein the primary regulator block includes a current limiting device PTC1, a resistor RP3, a resistor RP4, a resistor RP5, a resistor RP6, a resistor RP7, a transistor QP2, a transistor QP3, a regulator ZP1, and a regulator ZP2, the second terminal of the current limiting device PTC1 is an input terminal of the primary regulator block, the first terminal of the current limiting device PTC1 is connected to the first terminal of the resistor RP3, the first terminal of the resistor RP4, the first terminal of the resistor RP5, the first terminal of the resistor RP6, and the first terminal of the resistor RP7, the second terminal of the resistor RP7 is connected to the base of the transistor QP2 and the cathode of the regulator ZP1, the collector of the transistor QP2 is connected to the second terminal of the resistor 6, the emitter of the transistor QP2 is connected to the base of the transistor RP3, and the collector of the transistor QP 39rp 3 is connected to the second terminal of the second terminal QP3, The second end of the resistor RP4 and the second end of the resistor RP5, the emission set of the triode QP3 is connected with the cathode of a voltage regulator tube ZP2 and forms the output end of the primary voltage regulator module, and the anode of the voltage regulator tube ZP1 and the anode of the voltage regulator tube ZP2 are connected to the ground in common.
9. The dc regulated power supply circuit of claim 3 wherein said charging block includes a diode DP3 and a diode DP4, an anode of said diode DP3 being connected to an anode of said diode DP4 and constituting an input of said charging block, and a cathode of said diode DP3 being connected to a cathode of said diode DP4 and constituting an output of said charging block.
10. The dc regulated power supply circuit of claim 1, wherein the linear buck module comprises a capacitor CP2, a capacitor CP3, a capacitor CP4, a capacitor CP5, a capacitor CP6, a capacitor CP7, a capacitor CP8, a resistor RP8, a resistor RP9, a resistor RP10, a diode DP10, a diode LED 10, a diode TVS 10, and a linear regulator LDO 10, wherein a first end of the capacitor CP 10 is connected to a first end of the capacitor CP 10, an anode of the diode LED 10, a first end of the resistor RP10, and a first end of the resistor RP10, a cathode of the diode LED 10 is connected to the first end of the resistor RP10, a second end of the resistor RP10 is connected to a second end of the resistor RP10, a first end of the capacitor CP 10, a cathode of the diode CP 10, and an input end of the linear regulator LDO 10, and an output end of the diode DP10 is connected to an output end of the linear regulator DP10, The first terminal of the capacitor CP6, the first terminal of the capacitor CP7, the first terminal of the capacitor CP8, and the cathode of the diode TVS7 constitute an output terminal of the linear buck module, and the second terminal of the capacitor CP2, the second terminal of the capacitor CP3, the second terminal of the capacitor CP4, the second terminal of the capacitor CP5, the second terminal of the capacitor CP6, the second terminal of the capacitor CP7, the second terminal of the capacitor CP8, the anode of the diode TVS7, and the ground terminal of the linear regulator LDO1 are commonly connected to ground.
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| CN112631357B (en) | 2022-10-21 |
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