CN104135043B - A kind of two-stage safeguard protection feedback control charger - Google Patents
A kind of two-stage safeguard protection feedback control charger Download PDFInfo
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- CN104135043B CN104135043B CN201410271796.4A CN201410271796A CN104135043B CN 104135043 B CN104135043 B CN 104135043B CN 201410271796 A CN201410271796 A CN 201410271796A CN 104135043 B CN104135043 B CN 104135043B
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Abstract
The open a kind of two-stage safeguard protection feedback control charger of the present invention, including ac input circuit, transformator, DC output circuit, PWM driving chip and the first voltage feedback circuit, ac input circuit electrically connects with transformator, transformator electrically connects with DC output circuit, DC output circuit and the electrical connection of the first voltage feedback circuit, first voltage feedback circuit electrically connects with PWM driving chip, it is characterized in that, also include the second voltage feedback circuit and accessory power supply, DC output circuit and the electrical connection of the second voltage feedback circuit, second voltage feedback circuit electrically connects with PWM driving chip, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and the electrical connection of PWM driving chip.Increase the second voltage feedback circuit and accessory power supply changes power supply mode, not only achieve charger charging safe and reliable, improve the performance of charging, and because the feature of accessory power supply low-power consumption standby can also reach to save the purpose of the energy.
Description
Technical field
The present invention relates to a kind of two-stage safeguard protection feedback control charger, belong to charger device technical field.
Background technology
Along with socioeconomic development, the kind of electronic product is more and more, as the requirement that electronic product is supporting, the demand of charger is also more and more, the original purpose of charger is contemplated to charge to electronic product, at present, the circuit structure of charger is as shown in Figure 1, the charge function of charger only focused on by the charger of this structure, electronic product can be given fully charged, and the charging reliability and stability of transformator are paid close attention to the highest, it is low that some charger there is also charge efficiency, the problem of the waste energy.
Summary of the invention
The problem existed for above-mentioned prior art, the present invention provides a kind of two-stage safeguard protection feedback control charger, and charging performance is good, safe and reliable, saves the energy, and charge efficiency is high.
To achieve these goals, the technical solution used in the present invention is: a kind of two-stage safeguard protection feedback control charger, including ac input circuit, transformator, DC output circuit, PWM driving chip and the first voltage feedback circuit, ac input circuit electrically connects with transformator, transformator electrically connects with DC output circuit, DC output circuit and the electrical connection of the first voltage feedback circuit, first voltage feedback circuit electrically connects with PWM driving chip, also include the second voltage feedback circuit and accessory power supply, DC output circuit and the electrical connection of the second voltage feedback circuit, second voltage feedback circuit electrically connects with PWM driving chip, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and the electrical connection of PWM driving chip.
Further, ac input circuit includes that live wire accesses foot L, zero line accesses foot N, electric fuse FS1, commutation diode D1, commutation diode D2, commutation diode D3, commutation diode D4 and electrochemical capacitor C1, live wire is accessed foot L and is connected to anode and the negative electrode of commutation diode D3 of commutation diode D1 by electric fuse FS1, zero line accesses foot N and is connected to anode and the negative electrode of commutation diode D4 of commutation diode D2, the negative electrode of commutation diode D1 and the negative electrode of commutation diode D2 are connected to the positive pole of electrochemical capacitor C1, the anode of commutation diode D3 and the anode of commutation diode D4 are connected to the negative pole of electrochemical capacitor C1.
Further, transformator includes resistance R1, electric capacity C2, commutation diode D5, transformator T1 and commutation diode D6, one end of resistance R1 is connected to one end of electric capacity C2 and first pin of T1, the other end of resistance R1 is connected to the other end and the negative electrode of commutation diode D5 of electric capacity C2, the anode of commutation diode D5 is connected to the three-prong of transformator T1, the plus earth of commutation diode D6, the negative electrode of commutation diode D6 is connected to second pin of transformator T1, 11st pin of transformator is connected to the ground of direct current output, 12nd pin of transformator is connected to the anode of the Schottky diode D7 of direct current output.
Further, DC output circuit includes Schottky diode D7, Schottky diode D8, inductance L1 and electrochemical capacitor C10, the negative electrode of Schottky diode D7 and the negative electrode of Schottky diode D8 are connected to positive pole and the positive pole output pin of direct current output of electrochemical capacitor C10 by inductance L1, and the anode of Schottky diode D8 and the negative pole of electrochemical capacitor C1O are connected to output ground.
nullFurther，PWM driving chip，Including electrochemical capacitor C3、PWM driving chip U1、Resistance R3、Electric capacity C4、Electric capacity C7、Resistance R4、Electric capacity C6、Resistance R5、Electric capacity C5、Resistance R6、N-channel depletion field effect transistor Q1 and resistance R2，First pin of PWM driving chip U1 is connected to the 4th pin of U2 and U3、Resistance R3 and one end of electric capacity C4，4th pin of U2 and U3、Resistance R3 and the other end of electric capacity C4、2nd pin of PWM driving chip U1、5th pin ground connection，3rd pin of PWM driving chip U1 passes through electric capacity C6 ground connection，It is connected to PWM driving chip U1 the 8th pin by resistance R4，4th pin of PWM driving chip U1 passes through electric capacity C5 ground connection，One end and the source electrode of N-channel depletion field effect transistor Q1 of resistance R2 it is connected to by resistance R5，The other end ground connection of resistance R2，6th pin of PWM driving chip U1 is connected to the gate pole of Q1 by resistance R6，The drain electrode of N-channel depletion field effect transistor Q1 is connected to the 3rd pin of transformator，7th pin of PWM driving chip U1 is connected with accessory power supply and passes through electrochemical capacitor C3 ground connection，8th pin of PWM driving chip U1 passes through electric capacity C7 ground connection.
nullFurther，First voltage feedback circuit includes resistance R7、Photoelectrical coupler U28、Resistance R8、Diode D12、Comparison amplifier U58、Electric capacity C8、Resistance R9、Resistance R10、Resistance R11 and resistance R12，Accessory power supply is connected to first pin of photoelectrical coupler U28 by resistance R7，Second pin of photoelectrical coupler U2 is connected to the anode of diode D12 by resistance R8，The negative electrode of diode D12 is connected to the 7th pin of comparison amplifier U58，And pass sequentially through electric capacity C8、Resistance R9 is connected to the 6th pin and the resistance R11 of comparison amplifier U58、One end of resistance R12，The other end of resistance R11 is connected to the positive pole of DC output circuit，The other end of resistance R12 is connected to the ground of DC output circuit，5th pin of comparison amplifier U58 is connected to reference voltage input terminal by resistance R10，8th pin of comparison amplifier U58 is connected to the secondary output voltage of accessory power supply，4th pin of comparison amplifier U58 is connected to ground.
Further, second voltage feedback circuit includes resistance R13, photoelectrical coupler U38, one end of resistance R13 is connected to the positive pole of DC output circuit, the other end of resistance R13 is connected to first pin of photoelectrical coupler U38, the second pin ground connection of photoelectrical coupler U38, the three-prong of photoelectrical coupler U38 connects ground, former limit, and the 4th pin of photoelectrical coupler U38 connects the first pin of PWM driving chip.
The invention has the beneficial effects as follows: increase the second voltage feedback circuit and accessory power supply by former charging device and change that power supply mode realizes starting shooting safely and fast, zero volt rises and fills the purpose of output controlled with multivoltage, not only achieve charger charging safe and reliable, improve the performance of charging, and because the feature of accessory power supply low-power consumption standby can also reach to save the purpose of the energy.
Accompanying drawing explanation
Fig. 1 is existing charger circuit structured flowchart；
Fig. 2 is the circuit structure block diagram of the present invention；
Fig. 3 is the circuit diagram of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figures 2 and 3, this two-stage safeguard protection feedback control charger, including ac input circuit, transformator, DC output circuit, PWM driving chip and the first voltage feedback circuit, ac input circuit electrically connects with transformator, transformator electrically connects with DC output circuit, DC output circuit and the electrical connection of the first voltage feedback circuit, first voltage feedback circuit electrically connects with PWM driving chip, also include the second voltage feedback circuit and accessory power supply, DC output circuit and the electrical connection of the second voltage feedback circuit, second voltage feedback circuit electrically connects with PWM driving chip, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and the electrical connection of PWM driving chip.Ac input circuit includes that live wire accesses foot L, zero line accesses foot N, electric fuse FS1, commutation diode D1, commutation diode D2, commutation diode D3, commutation diode D4 and electrochemical capacitor C1, live wire is accessed foot L and is connected to anode and the negative electrode of commutation diode D3 of commutation diode D1 by electric fuse FS1, zero line accesses foot N and is connected to anode and the negative electrode of commutation diode D4 of commutation diode D2, the negative electrode of commutation diode D1 and the negative electrode of commutation diode D2 are connected to the positive pole of electrochemical capacitor C1, the anode of commutation diode D3 and the anode of commutation diode D4 are connected to the negative pole of electrochemical capacitor C1.Transformator includes resistance R1, electric capacity C2, commutation diode D5, transformator T1 and commutation diode D6, one end of resistance R1 is connected to one end of electric capacity C2 and first pin of T1, the other end of resistance R1 is connected to the other end and the negative electrode of commutation diode D5 of electric capacity C2, the anode of commutation diode D5 is connected to the three-prong of transformator T1, the plus earth of commutation diode D6, the negative electrode of commutation diode D6 is connected to second pin of transformator T1, 11st pin of transformator is connected to the ground of direct current output, 12nd pin of transformator is connected to the anode of the Schottky diode D7 of direct current output.DC output circuit includes Schottky diode D7, Schottky diode D8, inductance L1 and electrochemical capacitor C10, the negative electrode of Schottky diode D7 and the negative electrode of Schottky diode D8 are connected to positive pole and the positive pole output pin of direct current output of electrochemical capacitor C10 by inductance L1, and the anode of Schottky diode D8 and the negative pole of electrochemical capacitor C1O are connected to output ground.nullPWM driving chip，Including electrochemical capacitor C3、PWM driving chip U1、Resistance R3、Electric capacity C4、Electric capacity C7、Resistance R4、Electric capacity C6、Resistance R5、Electric capacity C5、Resistance R6、N-channel depletion field effect transistor Q1 and resistance R2，First pin of PWM driving chip U1 is connected to the 4th pin of U2 and U3、Resistance R3 and one end of electric capacity C4，4th pin of U2 and U3、Resistance R3 and the other end of electric capacity C4、2nd pin of PWM driving chip U1、5th pin ground connection，3rd pin of PWM driving chip U1 passes through electric capacity C6 ground connection，It is connected to PWM driving chip U1 the 8th pin by resistance R4，4th pin of PWM driving chip U1 passes through electric capacity C5 ground connection，One end and the source electrode of N-channel depletion field effect transistor Q1 of resistance R2 it is connected to by resistance R5，The other end ground connection of resistance R2，6th pin of PWM driving chip U1 is connected to the gate pole of Q1 by resistance R6，The drain electrode of N-channel depletion field effect transistor Q1 is connected to the 3rd pin of transformator，7th pin of PWM driving chip U1 is connected with accessory power supply and passes through electrochemical capacitor C3 ground connection，8th pin of PWM driving chip U1 passes through electric capacity C7 ground connection.nullFirst voltage feedback circuit includes resistance R7、Photoelectrical coupler U28、Resistance R8、Diode D12、Comparison amplifier U58、Electric capacity C8、Resistance R9、Resistance R10、Resistance R11 and resistance R12，Accessory power supply is connected to first pin of photoelectrical coupler U28 by resistance R7，Second pin of photoelectrical coupler U2 is connected to the anode of diode D12 by resistance R8，The negative electrode of diode D12 is connected to the 7th pin of comparison amplifier U58，And pass sequentially through electric capacity C8、Resistance R9 is connected to the 6th pin and the resistance R11 of comparison amplifier U58、One end of resistance R12，The other end of resistance R11 is connected to the positive pole of DC output circuit，The other end of resistance R12 is connected to the ground of DC output circuit，5th pin of comparison amplifier U58 is connected to reference voltage input terminal by resistance R10，8th pin of comparison amplifier U58 is connected to the secondary output voltage of accessory power supply，4th pin of comparison amplifier U58 is connected to ground.Second voltage feedback circuit includes resistance R13, photoelectrical coupler U38, one end of resistance R13 is connected to the positive pole of DC output circuit, the other end of resistance R13 is connected to first pin of photoelectrical coupler U38, the second pin ground connection of photoelectrical coupler U38, the three-prong of photoelectrical coupler U38 connects ground, former limit, and the 4th pin of photoelectrical coupler U38 connects the first pin of PWM driving chip.
The Switching Power Supply charger that existing univoltage is exported, former secondary can be with exchange input or direct current output or the voltage battery-powered operation of transformator auxiliary winding rectification output, but require single channel to export multiple voltage for some, zero volt acts the charger filling contour performance, because supply voltage and output voltage have direct relation, this power supply mode can not meet demand, there will be the problem that high-low voltage cannot process, cause circuit uncontrollable, the phenomenons such as overcurrent-overvoltage occur, charger or battery will be burnt out.
For the charger of existing univoltage list electric current output, only purpose can well be realized with chips such as comparison amplifier, stabilivolt or reference voltage voltage stabilizing chips.But require single channel to export multiple voltage for some, zero volt acts the charger filling contour performance, is necessary for adding microcontroller chip, provides required various reference voltages.
For charger of the present invention, increase a road small-power, low cost, low-power consumption accessory power supply, it is possible not only to rise for single channel output multiple voltage, zero volt and the characteristic such as fills and realize basic function of supplying power, make circuit normal safe work, and the advantage that the characteristic of its low-power consumption standby has the saving energy.
For charger of the present invention, PWM driving chip is used to provide various feedback reference voltage sources, it is achieved the purpose of multivoltage output.
For charger of the present invention, starting machine when, during PWM driving chip reset initialization, each pin voltage state is uncontrolled, feedback voltage source is also the most uncertain, when there may be startup, overvoltage burns out the dangerous phenomenon of charger, for preventing this phenomenon from occurring, then increase rapid-action the second voltage feedback circuit that a road stabilivolt forms, limit maximum output voltage.And can be when charger operation, as dual fail-safe, the generation of protection overvoltage phenomenon.
Claims (5)
- null1. a two-stage safeguard protection feedback control charger，Including ac input circuit、Transformator、DC output circuit、PWM driving chip and the first voltage feedback circuit，Ac input circuit electrically connects with transformator，Transformator electrically connects with DC output circuit，DC output circuit and the electrical connection of the first voltage feedback circuit，First voltage feedback circuit electrically connects with PWM driving chip，It is characterized in that，Also include the second voltage feedback circuit and accessory power supply，DC output circuit and the electrical connection of the second voltage feedback circuit，Second voltage feedback circuit electrically connects with PWM driving chip，Accessory power supply and the first voltage feedback circuit、Second voltage feedback circuit and the electrical connection of PWM driving chip，PWM driving chip，Including electrochemical capacitor C3、PWM driving chip U1、Resistance R3、Electric capacity C4、Electric capacity C7、Resistance R4、Electric capacity C6、Resistance R5、Electric capacity C5、Resistance R6、N-channel depletion field effect transistor Q1 and resistance R2，First pin of PWM driving chip U1 is connected to the 4th pin of U2 and U3、Resistance R3 and one end of electric capacity C4，4th pin of U2 and U3、Resistance R3 and the other end of electric capacity C4、2nd pin of PWM driving chip U1、5th pin ground connection，3rd pin of PWM driving chip U1 passes through electric capacity C6 ground connection，It is connected to PWM driving chip U1 the 8th pin by resistance R4，4th pin of PWM driving chip U1 passes through electric capacity C5 ground connection，One end and the source electrode of N-channel depletion field effect transistor Q1 of resistance R2 it is connected to by resistance R5，The other end ground connection of resistance R2，6th pin of PWM driving chip U1 is connected to the gate pole of Q1 by resistance R6，The drain electrode of N-channel depletion field effect transistor Q1 is connected to the 3rd pin of transformator，7th pin of PWM driving chip U1 is connected with accessory power supply and passes through electrochemical capacitor C3 ground connection，8th pin of PWM driving chip U1 passes through electric capacity C7 ground connection.
- A kind of two-stage safeguard protection feedback control charger the most according to claim 1, it is characterized in that, described ac input circuit includes that live wire accesses foot L, zero line accesses foot N, electric fuse FS1, commutation diode D1, commutation diode D2, commutation diode D3, commutation diode D4 and electrochemical capacitor C1, live wire is accessed foot L and is connected to anode and the negative electrode of commutation diode D3 of commutation diode D1 by electric fuse FS1, zero line accesses foot N and is connected to anode and the negative electrode of commutation diode D4 of commutation diode D2, the negative electrode of commutation diode D1 and the negative electrode of commutation diode D2 are connected to the positive pole of electrochemical capacitor C1, the anode of commutation diode D3 and the anode of commutation diode D4 are connected to the negative pole of electrochemical capacitor C1.
- A kind of two-stage safeguard protection feedback control charger the most according to claim 1, it is characterized in that, described transformator includes resistance R1, electric capacity C2, commutation diode D5, transformator T1 and commutation diode D6, one end of resistance R1 is connected to one end of electric capacity C2 and first pin of T1, the other end of resistance R1 is connected to the other end and the negative electrode of commutation diode D5 of electric capacity C2, the anode of commutation diode D5 is connected to the three-prong of transformator T1, the plus earth of commutation diode D6, the negative electrode of commutation diode D6 is connected to second pin of transformator T1, 11st pin of transformator is connected to the ground of direct current output, 12nd pin of transformator is connected to the anode of the Schottky diode D7 of direct current output.
- A kind of two-stage safeguard protection feedback control charger the most according to claim 1; it is characterized in that; described DC output circuit includes Schottky diode D7, Schottky diode D8, inductance L1 and electrochemical capacitor C10; the negative electrode of Schottky diode D7 and the negative electrode of Schottky diode D8 are connected to positive pole and the positive pole output pin of direct current output of electrochemical capacitor C10 by inductance L1, and the anode of Schottky diode D8 and the negative pole of electrochemical capacitor C1O are connected to output ground.
- nullA kind of two-stage safeguard protection feedback control charger the most according to claim 1，It is characterized in that，The first described voltage feedback circuit includes resistance R7、Photoelectrical coupler U28、Resistance R8、Diode D12、Comparison amplifier U58、Electric capacity C8、Resistance R9、Resistance R10、Resistance R11 and resistance R12，Accessory power supply is connected to first pin of photoelectrical coupler U28 by resistance R7，Second pin of photoelectrical coupler U28 is connected to the anode of diode D12 by resistance R8，The negative electrode of diode D12 is connected to the 7th pin of comparison amplifier U58，And pass sequentially through electric capacity C8、Resistance R9 is connected to the 6th pin and the resistance R11 of comparison amplifier U58、One end of resistance R12，The other end of resistance R11 is connected to the positive pole of DC output circuit，The other end of resistance R12 is connected to the ground of DC output circuit，5th pin of comparison amplifier U58 is connected to reference voltage input terminal by resistance R10，8th pin of comparison amplifier U58 is connected to the secondary output voltage of accessory power supply，4th pin of comparison amplifier U58 is connected to ground.
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| CN105959600B (en) * | 2016-06-29 | 2023-04-07 | 重庆惠科金扬科技有限公司 | Circuit for quickly turning off TV indicator lamp after power failure and television |
| CN106300532A (en) * | 2016-08-31 | 2017-01-04 | 徐州爱特普电子有限公司 | Intelligent battery repairs charger charging circuit |
| CN109819686B (en) | 2017-09-22 | 2024-02-23 | Oppo广东移动通信有限公司 | Power supply circuit, power supply device and control method |
| CN109347174A (en) * | 2018-11-23 | 2019-02-15 | 深圳众鑫凯科技有限公司 | A zero-volt battery charging circuit and its control method |
| CN112564490A (en) * | 2020-11-11 | 2021-03-26 | 广州金升阳科技有限公司 | Output voltage switching circuit of switching power supply and switching method thereof |
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Denomination of invention: Two-stage safety protection feedback control charger Effective date of registration: 20181115 Granted publication date: 20160824 Pledgee: Xuzhou Huaichang Investment Co., Ltd. Pledgor: Xuzhou Hengyuan Electrical Appliances Co., Ltd. Registration number: 2018320000288 |
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Date of cancellation: 20210615 Granted publication date: 20160824 Pledgee: Xuzhou Huaichang Investment Co.,Ltd. Pledgor: XUZHOU HENGYUAN ELECTRICAL APPLIANCES Co.,Ltd. Registration number: Y2019320000262 |