CN112631357B - DC voltage-stabilized power supply circuit - Google Patents
DC voltage-stabilized power supply circuit Download PDFInfo
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- CN112631357B CN112631357B CN202011532683.7A CN202011532683A CN112631357B CN 112631357 B CN112631357 B CN 112631357B CN 202011532683 A CN202011532683 A CN 202011532683A CN 112631357 B CN112631357 B CN 112631357B
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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 is 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-stabilizing 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, high 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 an output end of the second switch module and 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 controls the base of the transistor to switch on or off the whole first switch module by the control signal and the enable signal.
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 configured to stabilize a 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 the prior art.
As an 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 a charger 106, an output terminal of the charging module 105 is connected to a second input terminal of the primary voltage regulating 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 of the transistor QP4 is connected to a second end of the resistor RP17 and a second end of the capacitor CP1 and is connected 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 end of the first switch module 101, the first control end inputs a control signal MCU _ LDO _ EN, an anode of the diode ke 13 is connected to a first end of the resistor RP12, and a second end of the second switch module is an external control signal urp _ DP _ enable control terminal.
The second switch module 102 includes a diode DP5, a diode DP6, a resistor RP15, and a transistor QP1, an emitter of the transistor QP1 is an output end of the second switch module 102, a collector of the transistor QP1 is connected to a first end 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 end B + of the second switch module 102, and an anode of the diode DP6 is a second input end B16+ of the second switch module 102.
The primary voltage stabilizing module 103 comprises a current limiting device PTC1, a resistor RP3, a resistor RP4, a resistor RP5, a resistor RP6, a resistor RP7, a triode QP2, a triode QP3, a voltage regulator ZP1 and a voltage regulator ZP2, wherein the second end of the current limiting device PTC1 is the input end of the primary voltage stabilizing module 103, the first end of the current limiting device PTC1 is connected with the first end of the resistor RP3, the first end of the resistor RP4, the first end of the resistor RP5, the first end of the resistor RP6 and the first end of the resistor RP7, the second end of the resistor RP7 is connected with the base of the triode QP2 and the cathode of the voltage regulator ZP1, the collector of the triode QP2 is connected with the second end of the resistor RP6, the emission set of the triode QP2 is connected with the base of the triode QP3, the collector of the triode QP3 is connected with the second end of the resistor RP3, 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 the voltage regulator ZP2 and the cathode of the voltage regulator ZP2 to form the output end of the primary voltage stabilizing module 103, and the anode of the ZP1 and the ZP2 is connected with the common ground.
The charging module 105 includes a diode DP3 and a diode DP4, an anode of the diode DP3 is connected to an anode of the diode DP4 and constitutes an input terminal CH + of the charging module 105, and a cathode of the diode DP3 is connected to a cathode of the diode DP4 and constitutes an output terminal of the charging module 105.
The linear buck module 104 includes a capacitor CP2, a capacitor CP3, a capacitor CP4, a capacitor CP5, a capacitor CP6, a capacitor CP7, a capacitor CP8, a resistor RP9, a resistor RP10, a diode DP14, a diode LED7, a diode TVS7, and a linear regulator LDO1, the linear regulator LDO1 is a chip ME6239, a first end of the capacitor CP3 is connected to a first end of the capacitor CP2, an anode of the diode LED7, a first end of the resistor RP9, a first end of the resistor RP10, a first end of the capacitor CP4, a first end of the capacitor CP5, a cathode of the diode DP14, and an input end of the linear regulator, a cathode of the diode DP14 is connected to a first end of the resistor RP8, a second end of the resistor RP9, a second end of the resistor RP10, a first end of the capacitor CP4, a first end of the capacitor CP5, a cathode of the diode DP14, and an input end of the linear regulator, an anode of the diode DP14 is connected to an output end of the linear regulator LDO1, a first end of the capacitor CP6, a first end of the capacitor CP7, a first end of the capacitor CP8, a cathode of the capacitor CP7, a second end of the capacitor CP3, a second end of the capacitor CP4, a cathode of the capacitor CP7, a common ground, a second end of the capacitor CP7, and a second end of the capacitor CP7 of the capacitor CP8, and a common ground, and a second end of the diode DP 7 of the capacitor TVS 7.
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 DP 13), 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 to low level, so that the 1 st pin of the PNP transistor QP1 connected to the 1 st pin of the resistor RP16 is pulled down, the PNP transistor QP1 is turned on, the B +/B16+ voltage output from the battery passes through the diode DP5, the diode DP6, the PTC element 1, reaches the voltage dividing resistor RP7, the high voltage is converted by the voltage-stabilizing diode RP1 connected to the 2 nd pin of the NPN 7 into 12V voltage after passing through the diode DP5, the cathode 2 nd pin of the LDO diode ZP1, the resistor RP3, the emitter, the filtering diode CP3, the filtering transistor RP3, the high voltage is amplified by the transistor CP3, and the emitter of the transistor CP3, and the filtering transistor CP 3.
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 (CH + = 0) is input from the external charger 106, the entire circuit does not operate, and the power consumption is 0uA.
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, when the level of the 2 signals is low level, and CH + is high level, the voltage of CH + reaches a voltage dividing and current limiting resistor RP7 through diodes DP3 and DP4, the high voltage is stabilized into 12V by a voltage stabilizing diode ZP1 connected with the No. 2 pin of RP7, meanwhile, the voltage of 12V reaches the No. 1 pin (base) of an NPN triode QP2 connected with the cathode of ZP1, the base current is amplified by the NPN triode QP2 and then transmitted to the No. 1 pin (base) of an triode QP3 connected with the No. 3 pin (emitter), the base current is amplified again by the NPN triode QP3, then passes through a voltage stabilizing tube ZP2 and filter capacitors CP2 and CP3 connected with the No. 3 pin (emitter), and then passes through voltage dividing and current limiting resistors RP9, RP10 and filter capacitors CP4 and CP5 and then reaches the No. 2 pin of an LDO1, the LDO1 converts the voltage into a stable voltage of 3.3V and then outputs the stable voltage from the No. 3V through the filter capacitors CP6, CP7, CP8 and the external elements, and the ESD external elements and the external components for use of the MCU system.
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 limitation of resistors RP3 to RP7 in a primary voltage stabilizing module and the voltage stabilizing function of a voltage stabilizing diode ZP1 to realize the high voltage resistance characteristic, and also utilizes the voltage division and current limitation of the resistors RP3 to RP7 and the current amplification of the triodes QP2 and QP3 to realize the functions of low static power consumption and large current loading, and also utilizes the linear voltage reduction function of a linear device 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 a person skilled in the art to which the invention pertains, several equivalent alternatives or obvious modifications, all of which have the same properties or uses, without departing from the inventive concept, should be considered as falling within the scope of the patent protection of the invention, as determined by the claims submitted.
Claims (8)
1. A DC regulated power supply circuit, comprising:
the control end of the first switch module is used for connecting the micro control unit and external equipment, and the output end of the first switch module is grounded and used for switching on or off according to the states of a control signal sent by the micro control unit and an enable signal sent by the external equipment;
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;
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 first switch module comprises 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, wherein a first end of the resistor RP16 is an output end of the first switch module, 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 emission set of the transistor QP4, a second end of the resistor RP17 and a second end of the capacitor CP1 are connected to ground in common, an anode of the diode DP10 is connected to the first end of the resistor RP13, a second end of the resistor RP13 is a first control end of the first switch module, an anode of the diode DP13 is connected to the first end of the resistor RP12, and a second end of the resistor RP12 is a second control end of the first switch module;
the second switch module comprises a diode DP5, a diode DP6, a resistor RP15 and a triode QP1, the emitter of the triode QP1 is the output end of the second switch module, the collector of the triode QP1 is connected with the first end of the resistor RP15, the cathode of the diode DP5 and the cathode of the diode DP6, the anode of the diode DP5 is the first input end of the second switch module, and the anode of the diode DP6 is the second input end of the second switch module.
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 coupled to a charger and an output coupled 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. A dc regulated power supply circuit according to claim 3, wherein when the control signal and the enable signal are both low signals, the charger outputs a voltage through the charging block, the primary regulator block regulates the voltage output by the charging block to obtain a first voltage, and the linear buck block steps down 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 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, a second end of the current limiting device PTC1 is an input end of the primary regulator block, a first end of the current limiting device PTC1 is connected to a first end of the resistor RP3, a first end of the resistor RP4, a first end of the resistor QP 5, a first end of the resistor RP6, and a first end of the resistor RP7, a second end of the resistor PTC 7 is connected to a base of the transistor QP2 and a cathode of the regulator ZP1, a collector of the transistor QP2 is connected to a second end of the resistor QP4, a second end of the resistor ZP 5, an emitter collector of the transistor QP2 is connected to a base of the transistor QP3, a collector of the transistor QP3 is connected to a second end of the resistor RP3, a second end of the resistor RP4, and a second end of the resistor ZP 3, and an emitter of the regulator ZP2 are connected to an output end of the regulator ZP2, and an output end of the regulator ZP 2.
7. A regulated dc power supply circuit according to claim 3 wherein the charging block 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 of the charging block, the cathode of the diode DP3 being connected to the cathode of the diode DP4 and constituting the output of the charging block.
8. 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 RP9, a resistor RP10, a diode DP14, a diode LED7, a diode TVS7, and a linear regulator LDO1, wherein a first end of the capacitor CP2 is connected to a first end of the capacitor CP3, an anode of the diode LED7, a first end of the resistor RP9, and a first end of the resistor RP10, a cathode of the diode LED7 is connected to a first end of the resistor RP8, a second end of the resistor RP8 is connected to a second end of the resistor RP9, a second end of the resistor RP10, a first end of the capacitor CP4, a first end of the capacitor CP5, a cathode of the diode DP14, and an input end of the linear regulator LDO1, an anode of the diode DP14 is connected to an output end of the linear LDO1, a first end of the capacitor CP6, a second end of the capacitor CP7, a cathode of the capacitor CP8, and a cathode of the capacitor CP7, a common ground of the linear regulator CP2, a second end of the capacitor CP7, and a second end of the capacitor CP3, a second end of the capacitor CP7, and a common ground of the capacitor CP7, and a second end of the capacitor CP1, and a common ground of the capacitor CP 1.
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| CN211405864U (en) * | 2020-03-12 | 2020-09-01 | 湖北汉瑞景汽车智能系统有限公司 | Multichannel high withstand voltage MCU power supply reset circuit |
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2020
- 2020-12-22 CN CN202011532683.7A patent/CN112631357B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104009656A (en) * | 2014-06-17 | 2014-08-27 | 陆俊 | Switching power supply circuit and switching power supply |
| CN204290713U (en) * | 2014-11-28 | 2015-04-22 | 比亚迪股份有限公司 | A kind ofly provide the voltage conversion circuit of low tension for vehicle-mounted power consumption equipment |
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| CN112631357A (en) | 2021-04-09 |
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