CN110687955B - Constant voltage constant current control output power supply circuit - Google Patents
Constant voltage constant current control output power supply circuit Download PDFInfo
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- CN110687955B CN110687955B CN201911153376.5A CN201911153376A CN110687955B CN 110687955 B CN110687955 B CN 110687955B CN 201911153376 A CN201911153376 A CN 201911153376A CN 110687955 B CN110687955 B CN 110687955B
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- 238000005070 sampling Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 14
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
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- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
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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
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Abstract
The invention provides a constant-voltage constant-current control output power supply circuit which comprises an MCU circuit and a DC/DC conversion power supply circuit, wherein the DC/DC conversion power supply circuit comprises a DC/DC power supply chip, the MCU circuit comprises a singlechip, a power input end and a power output end of the DC/DC power supply chip are respectively connected with an input power supply end and an output power supply end, an enabling end of the DC/DC power supply chip is connected with the singlechip, a current sampling circuit is connected between the DC/DC power supply chip and the output power supply end, an output voltage control end of the DC/DC power supply chip is connected with a constant-voltage constant-current control circuit, an output end of the current sampling circuit is connected with the constant-voltage constant-current control circuit, and the constant-voltage constant-current control circuit is connected with the singlechip. The invention has the advantages of small volume, perfect function, good flexibility, wide application range and the like.
Description
Technical Field
The invention belongs to the technical field of constant voltage and constant current output of power supplies, and particularly relates to a constant voltage and constant current control output power supply circuit.
Background
The existing lithium battery is charged by adopting a trickle charge, constant current and constant voltage three-section charging mode, and a large number of special integrated circuits are used for realizing the charging control function for the application in China and abroad. However, special specifications of lithium battery packs, such as multi-string high voltage and large capacity battery packs, require high voltage and large current for charging, and the optional application specific control integrated circuits are very difficult to find.
Disclosure of Invention
The invention aims to solve the problems and provides a constant voltage and constant current control output power supply circuit.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a constant voltage constant current control output power supply circuit, includes MCU circuit and DC/DC conversion power supply circuit, DC/DC conversion power supply circuit includes DC/DC power supply chip, MCU circuit includes the singlechip, the power input end and the power output end of DC/DC power supply chip are connected respectively in input power end and output power end, the enabling end of DC/DC power supply chip connect in the singlechip, be connected with current sampling circuit between DC/DC power supply chip and the output power end, the output voltage control end of DC/DC power supply chip is connected with constant voltage constant current control circuit, current sampling circuit's output connect in constant voltage constant current control circuit, constant voltage constant current control circuit connect in the singlechip.
In the constant voltage and constant current control output power supply circuit, the current sampling circuit comprises a sampling resistor connected in series between the DC/DC power supply chip and the output power supply end, the high voltage end and the low voltage end of the sampling resistor are respectively connected with the input positive end and the input negative end of the current amplifier, and the output end of the current amplifier is connected with the constant voltage and constant current control circuit.
In the above constant voltage and constant current control output power supply circuit, the constant voltage and constant current control circuit includes an analog electronic switch, a current control output and a voltage control output of the analog electronic switch are respectively connected to the constant current circuit and the constant voltage circuit, and a current control input and a voltage control input of the analog electronic switch are respectively connected to a current control signal end and a voltage control signal end of the singlechip.
In the constant voltage and constant current control output power supply circuit, the constant current circuit comprises a first double-integration circuit and a first operational amplifier, wherein two ends of the first double-integration circuit are respectively connected with a positive input end of the first operational amplifier and a current control output of an analog electronic switch, a negative input end of the first operational amplifier is connected with the current amplifier, and an output end of the first operational amplifier is connected with an output voltage control end of the DC/DC power supply chip through an optocoupler;
the constant voltage circuit comprises a second integrating circuit and a second operational amplifier, wherein two ends of the second integrating circuit are respectively connected with the positive input end of the second operational amplifier and the voltage control output of the analog electronic switch, the negative input end of the second operational amplifier is connected with the output end of the second operational amplifier through a diode, and the negative input end of the second operational amplifier and the common end of the diode are connected with the output voltage control end of the DC/DC power supply chip.
In the constant voltage and constant current control output power supply circuit, the first double-integration circuit is formed by connecting a twenty-sixth resistor, a third capacitor, a twenty-seventh resistor and a sixteenth capacitor, the input end of the first double-integration circuit is connected with the analog electronic switch, and the output end of the first double-integration circuit is connected with the first operational amplifier;
the second double-integration circuit is formed by connecting an eighteenth resistor, a first capacitor, a seventeenth resistor and a fifteenth capacitor, the input end of the second double-integration circuit is connected with the analog electronic switch, and the output end of the second double-integration circuit is connected with the second operational amplifier.
The constant voltage and constant current control output power supply circuit further comprises a VCC power supply circuit and a reference voltage source circuit connected with the VCC power supply circuit, wherein a reference voltage output end of the reference voltage source circuit is connected with a reference voltage end of the analog electronic switch.
In the constant voltage and constant current control output power supply circuit, the reference voltage end and the output end of the current amplifier are respectively connected to the singlechip.
In the constant voltage and constant current control output power supply circuit, a switching tube for preventing the output power supply end from discharging reversely and a switch control circuit for switching the switching tube are connected between the output power supply end and the sampling resistor.
In the constant voltage and constant current control output power supply circuit, the switch tube is an N-channel MOS tube, the switch control circuit is connected to the grid electrode of the N-channel MOS tube, the switch control circuit comprises a second triode, the collector electrode of the second triode is connected to the grid electrode of the N-channel MOS tube through a twenty-fifth resistor, the emitter electrode of the second triode is connected to the grounding end, the base electrode and the emitter electrode of the second triode are connected in parallel with an eighth resistor, the grid electrode and the source electrode of the N-channel MOS tube are connected in parallel with a third resistor, and the base electrode of the second triode is connected to the singlechip through a sixth resistor.
In the constant voltage and constant current control output power supply circuit, the singlechip is connected to the enabling end through the enabling circuit, the enabling circuit comprises a third triode, a base electrode of the third triode is connected to the singlechip through a fifth resistor, a collector electrode of the third triode is connected to the enabling end, an emitter electrode of the third triode is connected to the grounding end, and a seventh resistor is connected in parallel between the base electrode and the emitter electrode.
The invention has the advantages that: the device has the advantages of small volume, perfect functions, good flexibility, wide application range and the like; detecting the voltage and current output by the power supply, adjusting PWM signals, and ensuring the stability of constant voltage output or constant current output; converting the PWM into analog voltage by adopting a double-integration circuit, and shaping the amplitude of the PWM through an analog electronic switch so as to improve the accuracy of the analog voltage; the output voltage of the power supply module is commonly controlled by adopting a mode of connecting or connecting the outputs of the double operational amplifiers, so that the seamless switching between a constant-current output mode and a constant-voltage output mode is realized.
Drawings
FIG. 1 is a block diagram of a constant voltage and constant current control output power supply circuit of the present invention;
FIG. 2 is a schematic diagram of a main circuit in the constant voltage and constant current control output power supply circuit of the invention;
fig. 3 is a schematic diagram of an MCU circuit in the constant voltage constant current control output power supply circuit of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1, the embodiment discloses a constant voltage and constant current control output power supply circuit, which comprises an MCU circuit and a DC/DC conversion power supply circuit, wherein the DC/DC conversion power supply circuit comprises a DC/DC power supply chip A1 for converting an input power supply into a required voltage and current. The MCU circuit comprises a singlechip U5, a power input end Vi+ and a power output end vo+ of a DC/DC power chip A1 are respectively connected to an input power end Vin and an output power end vo+, the Vi-end and the Vo-end of the DC/DC power chip A1 are grounded, an enabling end CNT of the DC/DC power chip A1 is connected to the singlechip U5, and the singlechip U5 controls the DC/DC conversion power circuit to turn on or off output.
Further, as shown in fig. 2, the circuit further includes a VCC power supply circuit, where the VCC power supply circuit includes a linear voltage stabilizing integrated circuit U1, where Vin of the linear voltage stabilizing integrated circuit U1 is connected to an input power source Vin, GND is connected to a ground, vout is a VCC output, and outputs a voltage of 5V for powering a plurality of integrated circuits, and Vin and Vout are connected to the ground through a capacitor C8 and a capacitor C14, respectively.
Further, the single-chip microcomputer U5 is connected to the enabling end CNT through an enabling circuit, the enabling circuit comprises a third triode Q3, a base electrode of the third triode Q3 is connected to PB0 of the single-chip microcomputer U5 through a fifth resistor R5, a collector electrode of the third triode Q3 is connected to the enabling end CNT, an emitter electrode of the third triode is connected to a grounding end, and a seventh resistor R7 is connected in parallel to the base electrode and the emitter electrode. When EN is at high level, the third transistor Q3 is turned on, the enable terminal CNT is pulled down, and the DC/DC power chip A1 starts output.
Particularly, a current sampling circuit is connected between the DC/DC power supply chip A1 and the output power supply end vo+, a constant voltage and constant current control circuit is connected to an output voltage control end TRIM of the DC/DC power supply chip A1, the output voltage control end TRIM is an output voltage regulating pin, and when the pin is suspended or is 0.6V, the output voltage of the DC/DC power supply chip A1 is 0.6V; and (3) regulating the TRIM pin voltage downwards, increasing the output voltage, and enabling the output voltage of the DC/DC power supply chip A1 to reach the highest value of 24V as the TRIM pin voltage is regulated down to zero. The output end of the current sampling circuit is connected with the feedback input end of the constant voltage and constant current control circuit so that the constant voltage and constant current control circuit can adjust the voltage of the TRIM pin according to the magnitude of the sampling current to further adjust the output voltage of the DC/DC power supply chip A1. The control input end of the constant voltage and constant current control circuit is connected to the singlechip U5, and the output voltage value and the constant current output current value of the DC/DC power supply chip A1 are set through the singlechip U5.
Specifically, the current sampling circuit includes a sampling resistor R1 connected in series between the DC/DC power chip A1 and the output power terminal vo+, where a high voltage terminal and a low voltage terminal of the sampling resistor R1 are respectively connected to an input positive terminal and an input negative terminal of the current amplifier U2, and the current amplifier U2 converts an output current signal into a voltage signal to ground by sampling a voltage drop on the sampling resistor R1. The output end of the current amplifier U2 is used for outputting a current value signal Isen, the current value signal Isen is input to the constant voltage and constant current control circuit, and meanwhile, the output current value signal Isen is input to the singlechip U5.
Further, the VCC power supply circuit is also connected with a reference voltage source circuit, the reference voltage source circuit comprises a voltage stabilizing tube U9, a resistor R12, a resistor R36 and a resistor R37, one end of the resistor R12 is connected with the VCC output end of the VCC power supply circuit, the other end of the resistor R12 is connected with the 3 pin of the voltage stabilizing tube U9 and is used as a reference voltage Vref for outputting, and the reference voltage provides a reference voltage source for the constant voltage constant current control circuit and the singlechip U5. Two ends of R36 are respectively connected with the Vref output end and the 1 pin of the voltage stabilizing tube U9, two ends of R37 are respectively connected with the grounding end and the 1 pin of the voltage stabilizing tube U9, and the 2 pin of the voltage stabilizing tube U9 is connected with the grounding end.
Specifically, the constant voltage and constant current control circuit comprises an analog electronic switch U6 for switching a power supply constant voltage output mode or a power supply constant current output mode, the reference voltage Vref outputs a PWM signal which is normally output by the singlechip U5 and is connected to the reference voltage end of the analog electronic switch U6, the peak voltage is VCC, the accuracy is poor, the peak voltage of the reference voltage Vref is changed into the peak voltage of the reference voltage Vref through shaping of the analog electronic switch U6, and the accuracy is greatly improved.
Further, the current control output COM2 and the voltage control output COM1 of the analog electronic switch U6 are respectively connected to the constant current circuit and the constant voltage circuit, and the current control input IN2 and the voltage control input IN1 of the analog electronic switch U6 are respectively connected to the current control signal terminal pwm_i and the voltage control signal terminal pwm_u of the single-chip microcomputer U5, that is, PA7 and PB4 of the single-chip microcomputer.
The PWM current control signal and the PWM voltage control signal of the singlechip are respectively converted into direct current voltage with very small ripple waves through a secondary integration circuit of the constant current circuit and the constant voltage circuit, and the voltage amplitude is over against the duty ratio of PWM and is between 0 and the reference voltage Vref.
Specifically, the constant current circuit includes a first double-integration circuit and a first operational amplifier U4A, two ends of the first double-integration circuit are respectively connected to a positive input end of the first operational amplifier U4A and a current control output COM2 of the analog electronic switch U6, a negative input end of the first operational amplifier U4A is connected to the current amplifier U2, and an output end of the first operational amplifier U4A is connected to an output voltage control end TRIM of the DC/DC power supply chip A1 through an optocoupler U3;
the constant voltage circuit comprises a second integrating circuit and a second operational amplifier U4B, wherein two ends of the second integrating circuit are respectively connected with a positive input end of the second operational amplifier U4B and a voltage control output COM1 of an analog electronic switch U6, a negative input end of the second operational amplifier U4B is connected with an output end of the second operational amplifier U4B through a diode D1, and a common end of the negative input end of the second operational amplifier U4B and the diode D1 is connected with an output voltage control end TRIM of the DC/DC power supply chip A1.
Further, a resistor R4 is connected in series between the constant voltage circuit and the constant current circuit and between the constant current circuit and the output voltage control terminal TRIM.
In a power supply constant current output mode, the first operational amplifier U4A and the optocoupler U3 control left and right, when the output current of the DC/DC power supply chip A1 is low, the output end 6 pin of the current amplifier U2 is low, the output of the first operational amplifier U4A is high, the optocoupler U3 is conducted and increased, the TRIM pin voltage of the DC/DC power supply chip A1 is low, the output voltage is increased, and the output current is increased; conversely, the output of the current amplifier U2 becomes high, resulting in the output of U4A becoming low, and the TRIM pin voltage of the DC/DC power chip becomes high, the output voltage decreases, and the output current decreases through the conversion of the optocoupler U3.
In the power supply constant voltage output mode, the second operational amplifier U4B controls left and right, and the TRIM pin voltage of the DC/DC power supply chip is directly controlled according to the reference voltage Vref through the isolation and voltage following of the second operational amplifier U4B, so that the output voltage of the DC/DC power supply chip A1 is constant.
Specifically, the first double-integration circuit is formed by connecting a twenty-sixth resistor R26, a third capacitor C3, a twenty-seventh resistor R27 and a sixteenth capacitor C16, wherein the input end of the first double-integration circuit is connected with the analog electronic switch U6, and the output end of the first double-integration circuit is connected with the first operational amplifier U4A; similarly, the second double-integration circuit is formed by an eighteenth resistor R18, a first capacitor C1, a seventeenth resistor R17 and a fifteenth capacitor C15, and an input end of the second double-integration circuit is connected to the analog electronic switch U6, and an output end of the second double-integration circuit is connected to the second operational amplifier U4B.
Preferably, a switching tube Q1 for preventing the output power source terminal vo+ from discharging reversely and a switching control circuit for switching the switching tube Q1 are connected between the output power source terminal vo+ and the sampling resistor R1. The power output ends vo+ and SEN+ of the DC/DC power chip A1 are short-circuited and then connected to one side of the sampling resistor R1, which is far away from the switching tube Q1.
Specifically, the switching tube Q1 is an N-channel MOS tube, and when it is turned off, it can prevent the reverse discharge when the output power source terminal vo+ is connected to the battery. The switch control circuit is connected to the grid electrode of the N-channel MOS tube, the drain electrode of the N-channel MOS tube is connected with the sampling resistor R1, and the source electrode of the N-channel MOS tube is connected with the output power source end vo+.
The switch control circuit comprises a second triode Q2, wherein a collector electrode of the second triode Q2 is connected to a grid electrode of the N-channel MOS tube through a twenty-fifth resistor R25, an emitter electrode of the second triode Q2 is connected to a grounding end, an eighth resistor R8 is connected in parallel to a base electrode and an emitter electrode of the second triode Q2, a third resistor R3 is connected in parallel to a grid electrode and a source electrode of the N-channel MOS tube, a base electrode of the second triode Q2 is connected to the single chip microcomputer U5 through a sixth resistor R6, and RE control signals are connected to the base electrode of the second triode Q2 through voltage division of the sixth resistor R6 and the eighth resistor R8.
As shown in fig. 3, PA7 and PB4 of the single-chip microcomputer U5 are output as PWM functions, and the duty ratio is preset according to the required output voltage and current values. The output voltage and current of the output power end vo+ are divided by a resistor R29 and then connected into an analog input port of the singlechip U5, and the output voltage and current value is read through internal A/D conversion. The duty ratio of the output PWM can be finely adjusted through PID operation so as to achieve the purpose of closed-loop control.
The Vref end of the singlechip U5 is connected to a reference voltage source circuit to be used as the reference voltage of the A/D conversion.
RE and EN of the singlechip U5 are respectively used for controlling the on of the switch control circuit and the enabling of the DC/DC power supply chip A1.
And in the charging process of the connected battery, if the battery voltage is detected to be too low, entering a trickle charge mode, and reducing the constant current output value by adjusting PWM-I so as to protect the battery. When the battery voltage rises to a set value, the output current is set to a standard constant current value.
After the constant current mode is converted into the constant voltage mode, the output voltage of the DC/DC power supply chip A1 is improved by adjusting the PWM-U, the voltage drop loss caused by an output cable is compensated, and when the output current tends to 0, the compensation is gradually reduced to 0.
Preferably, the singlechip U5 can also increase soft start output, and in the power supply starting process, in order to prevent the surge current from being impacted and increasing the soft start output function caused by too fast change of output voltage, the gradual change of PWM is changed to a set value, so that the slow change of the output voltage is realized.
In the embodiment, a double-integration circuit is adopted to convert PWM into analog voltage, and the amplitude of the PWM is shaped through an analog electronic switch so as to improve the accuracy of the analog voltage; the output voltage of the power supply module is commonly controlled by adopting a mode of connecting or connecting the outputs of the double operational amplifiers, so that the seamless switching between a constant-current output mode and a constant-voltage output mode is realized; the current amplifier is adopted to convert the high-end output current signal into a voltage signal to the ground, so that the inconsistency of ground potential caused by series connection of detection resistors on the ground wire is avoided; the software PID regulation is adopted to realize closed-loop control of power supply output, so that the output stability and accuracy are improved, and the debugging workload is reduced; the on and off of the DC/DC conversion power supply circuit is controlled through an EN signal; the RE signal is used for controlling the on and off of a switching tube Q1 at the output end of the power supply, so that current backflow is avoided; the output constant voltage value and the constant current value of the power supply are respectively controlled by outputting PWM signals with adjustable duty ratio; the PWM signal is regulated by detecting the voltage and the current output by the DC/DC conversion power supply circuit, so that the constant voltage output or the constant current output is stable, and the output can be closed when the open loop of the power supply control loop is out of control; in the power supply starting process, the gradual change of the PWM to the set value realizes the slow change of the output voltage; during the charging process of the connected battery, the voltage of the battery can be detected, and the battery is automatically switched into trickle charge, constant current charge and constant voltage charge modes according to the voltage of the battery; in the constant voltage mode, the output voltage of the power supply is properly increased by detecting the output voltage, the voltage drop loss caused by the output cable is compensated, and when the output current tends to 0, the voltage drop loss is gradually reduced and compensated to 0; in the constant current mode, the TRIM pin voltage is regulated according to the output current, so that constant current output is maintained.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims, the connection of the invention being either direct or indirect.
Although the DC/DC power chip A1 is used more herein; a singlechip U5; an input power terminal Vin; the output power source end vo+; a sampling resistor R1; a current amplifier U2; a current control output COM2; a voltage control output COM1; a current control input IN2; a voltage control input IN1; a current control signal terminal PWM_I; a voltage control signal terminal PWM_U; a first operational amplifier U4A; an optocoupler U3; a second operational amplifier U4B; a diode D1; a switching tube Q1; a second triode Q2; enabling the end CNT; the third transistor Q3, etc., but does not exclude the possibility of using other terms. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (8)
1. The constant voltage constant current control output power supply circuit comprises an MCU circuit and a DC/DC conversion power supply circuit, wherein the DC/DC conversion power supply circuit comprises a DC/DC power supply chip, the MCU circuit comprises a singlechip, a power input end and a power output end of the DC/DC power supply chip are respectively connected with an input power end and an output power end, and an enabling end of the DC/DC power supply chip is connected with the singlechip, and the constant voltage constant current control circuit is connected between the DC/DC power supply chip and the output power end, and an output voltage control end of the DC/DC power supply chip is connected with a constant voltage constant current control circuit;
the constant voltage and constant current control circuit comprises an analog electronic switch for switching a power supply constant voltage output mode or a power supply constant current output mode, a constant current circuit and a constant voltage circuit, wherein the current control output and the voltage control output of the analog electronic switch are respectively connected with the constant current circuit and the constant voltage circuit, and the current control input and the voltage control input of the analog electronic switch are respectively connected with a current control signal end and a voltage control signal end of the singlechip;
the PWM signal output by the singlechip is changed into peak voltage of reference voltage output through shaping of the analog electronic switch.
2. The constant voltage and constant current control output power supply circuit according to claim 1, wherein the current sampling circuit comprises a sampling resistor connected in series between a DC/DC power supply chip and an output power supply end, a high voltage end and a low voltage end of the sampling resistor are respectively connected with an input positive end and an input negative end of a current amplifier, and an output end of the current amplifier is connected with the constant voltage and constant current control circuit.
3. The constant voltage and constant current control output power supply circuit according to claim 2, wherein the constant current circuit comprises a first double-integration circuit and a first operational amplifier, two ends of the first double-integration circuit are respectively connected with a positive input end of the first operational amplifier and a current control output of an analog electronic switch, a negative input end of the first operational amplifier is connected with the current amplifier, and an output end of the first operational amplifier is connected with an output voltage control end of the DC/DC power supply chip through an optocoupler;
the constant voltage circuit comprises a second double-integration circuit and a second operational amplifier, wherein two ends of the second double-integration circuit are respectively connected with the positive input end of the second operational amplifier and the voltage control output of the analog electronic switch, the negative input end of the second operational amplifier is connected with the output end of the second operational amplifier through a diode, and the negative input end of the second operational amplifier and the common end of the diode are connected with the output voltage control end of the DC/DC power supply chip.
4. The constant voltage and constant current control output power supply circuit according to claim 3, wherein the first double-integration circuit is formed by connecting a twenty-sixth resistor, a third capacitor, a twenty-seventh resistor and a sixteenth capacitor, and an input end of the first double-integration circuit is connected to the analog electronic switch, and an output end of the first double-integration circuit is connected to the first operational amplifier;
the second double-integration circuit is formed by connecting an eighteenth resistor, a first capacitor, a seventeenth resistor and a fifteenth capacitor, the input end of the second double-integration circuit is connected with the analog electronic switch, and the output end of the second double-integration circuit is connected with the second operational amplifier.
5. The constant voltage and constant current control output power supply circuit according to claim 4, wherein the reference voltage terminal and the output terminal of the current amplifier are respectively connected to the single chip microcomputer.
6. The constant voltage and constant current control output power supply circuit according to any one of claims 1 to 5, wherein a switching tube for preventing reverse discharge of the output power supply terminal and a switching control circuit for switching the switching tube are connected between the output power supply terminal and the sampling resistor.
7. The constant voltage and constant current control output power supply circuit according to claim 6, wherein the switching tube is an N-channel MOS tube, the switching control circuit is connected to a gate of the N-channel MOS tube, the switching control circuit comprises a second triode, a collector of the second triode is connected to the gate of the N-channel MOS tube through a twenty-fifth resistor, an emitter of the second triode is connected to a ground terminal, an eighth resistor is connected in parallel to a base and an emitter of the second triode, a third resistor is connected in parallel to the gate and a source of the N-channel MOS tube, and a base of the second triode is connected to the singlechip through a sixth resistor.
8. The constant voltage and constant current control output power supply circuit according to any one of claims 1 to 5, wherein the single chip microcomputer is connected to the enabling end through an enabling circuit, the enabling circuit comprises a third triode, a base electrode of the third triode is connected to the single chip microcomputer through a fifth resistor, a collector electrode of the third triode is connected to the enabling end, an emitter electrode of the third triode is connected to a ground end, and a seventh resistor is connected in parallel between the base electrode and the emitter electrode.
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| CN112445259B (en) | 2020-11-17 | 2022-10-11 | 长春捷翼汽车零部件有限公司 | Power supply voltage stabilization output adjusting device, method and system |
| CN112821734A (en) * | 2021-01-29 | 2021-05-18 | 浙江嘉科电子有限公司 | Intelligent power supply conversion control system |
| CN113394995B (en) * | 2021-06-03 | 2024-05-07 | 拓尔微电子股份有限公司 | Constant voltage constant current control circuit and quick charging circuit |
| CN116360540B (en) * | 2023-05-19 | 2023-09-29 | 四川奥库科技有限公司 | Voltage regulating system and voltage regulating method for chip test |
| CN116430159B (en) * | 2023-06-14 | 2023-09-26 | 江西斐耳科技有限公司 | Multifunctional test system |
| CN117996928B (en) * | 2024-04-03 | 2024-07-05 | 上海迈相电源技术有限公司 | Multi-port output charger and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0678471A (en) * | 1992-08-27 | 1994-03-18 | Sanyo Electric Co Ltd | Charging method |
| CN104868543A (en) * | 2015-05-20 | 2015-08-26 | 重庆大学 | Intelligent battery charger with wider input voltage scope |
| CN204732905U (en) * | 2015-05-19 | 2015-10-28 | 陕西三恒电子科技有限公司 | A kind of AC/DC intelligent charger |
| CN204835631U (en) * | 2015-08-12 | 2015-12-02 | 苏州汇川技术有限公司 | Digifax hybrid control storage battery charging circuit |
| CN209310049U (en) * | 2018-12-06 | 2019-08-27 | 宁波舜韵电子有限公司 | A kind of integrated kitchen range igniter safety control circuit |
| CN210605506U (en) * | 2019-11-22 | 2020-05-22 | 浙江嘉科电子有限公司 | Constant voltage and constant current control output power circuit |
-
2019
- 2019-11-22 CN CN201911153376.5A patent/CN110687955B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0678471A (en) * | 1992-08-27 | 1994-03-18 | Sanyo Electric Co Ltd | Charging method |
| CN204732905U (en) * | 2015-05-19 | 2015-10-28 | 陕西三恒电子科技有限公司 | A kind of AC/DC intelligent charger |
| CN104868543A (en) * | 2015-05-20 | 2015-08-26 | 重庆大学 | Intelligent battery charger with wider input voltage scope |
| CN204835631U (en) * | 2015-08-12 | 2015-12-02 | 苏州汇川技术有限公司 | Digifax hybrid control storage battery charging circuit |
| CN209310049U (en) * | 2018-12-06 | 2019-08-27 | 宁波舜韵电子有限公司 | A kind of integrated kitchen range igniter safety control circuit |
| CN210605506U (en) * | 2019-11-22 | 2020-05-22 | 浙江嘉科电子有限公司 | Constant voltage and constant current control output power circuit |
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Inventor after: Qian Yueguo Inventor after: Li Xiangfeng Inventor after: Tang Jianye Inventor after: Yao Longfei Inventor after: Li Daguang Inventor before: Qian Yueguo Inventor before: Li Xiangfeng Inventor before: Tang Jianye Inventor before: Yao Longfei Inventor before: Li Daguang |