CN204012794U - Two-stage safeguard protection FEEDBACK CONTROL charger - Google Patents
Two-stage safeguard protection FEEDBACK CONTROL charger Download PDFInfo
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- CN204012794U CN204012794U CN201420324793.8U CN201420324793U CN204012794U CN 204012794 U CN204012794 U CN 204012794U CN 201420324793 U CN201420324793 U CN 201420324793U CN 204012794 U CN204012794 U CN 204012794U
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Abstract
The utility model discloses a kind of two-stage safeguard protection FEEDBACK CONTROL charger, comprise ac input circuit, transformer, DC output circuit, PWM drives chip and the first voltage feedback circuit, ac input circuit is electrically connected to transformer, transformer is electrically connected to DC output circuit, DC output circuit is electrically connected to the first voltage feedback circuit, the first voltage feedback circuit drives chip to be electrically connected to PWM, it is characterized in that, also comprise second voltage feedback circuit and accessory power supply, DC output circuit is electrically connected to second voltage feedback circuit, second voltage feedback circuit drives chip to be electrically connected to PWM, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and PWM drive chip to be electrically connected to.Increase second voltage feedback circuit and accessory power supply and change supply power mode, not only realized 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 the object of energy savings.
Description
Technical field
The utility model relates to a kind of two-stage safeguard protection FEEDBACK CONTROL charger, belongs to charger device technical field.
Background technology
Along with socioeconomic development, the kind of electronic product is more and more, as the supporting requirement of electronic product, the demand of charger is also more and more, the original object of charger is exactly in order to charge to electronic product, at present, the circuit structure of charger as shown in Figure 1, the charger of this structure is only focused on the charge function of charger, can be full of electricity to electronic product, and not high to the charging reliability and stability concern of transformer, some charger also exists charge efficiency low, the problem wasting energy.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of two-stage safeguard protection FEEDBACK CONTROL charger, and charging performance is good, safe and reliable, energy savings, charge efficiency is high.
To achieve these goals, the technical solution adopted in the utility model is: a kind of two-stage safeguard protection FEEDBACK CONTROL charger, comprise ac input circuit, transformer, DC output circuit, PWM drives chip and the first voltage feedback circuit, ac input circuit is electrically connected to transformer, transformer is electrically connected to DC output circuit, DC output circuit is electrically connected to the first voltage feedback circuit, the first voltage feedback circuit drives chip to be electrically connected to PWM, also comprise second voltage feedback circuit and accessory power supply, DC output circuit is electrically connected to second voltage feedback circuit, second voltage feedback circuit drives chip to be electrically connected to PWM, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and PWM drive chip to be electrically connected to.
Further, ac input circuit comprises live wire access pin L, zero line access pin N, fuse FS1, rectifier diode D1, rectifier diode D2, rectifier diode D3, rectifier diode D4 and electrochemical capacitor C1, live wire access pin L is connected to the anode of rectifier diode D1 and the negative electrode of rectifier diode D3 by fuse FS1, zero line access pin N is connected to the anode of rectifier diode D2 and the negative electrode of rectifier diode D4, the negative electrode of the negative electrode of rectifier diode D1 and rectifier diode D2 is connected to the positive pole of electrochemical capacitor C1, the anodic bonding of the anode of rectifier diode D3 and rectifier diode D4 is to the negative pole of electrochemical capacitor C1.
Further, transformer comprises resistance R 1, capacitor C 2, rectifier diode D5, transformer T1 and rectifier diode D6, one end of resistance R 1 is connected to one end of capacitor C 2 and the first pin of T1, the other end of resistance R 1 is connected to the other end of capacitor C 2 and the negative electrode of rectifier diode D5, the anodic bonding of rectifier diode D5 is to the three-prong of transformer T1, the plus earth of rectifier diode D6, the negative electrode of rectifier diode D6 is connected to the second pin of transformer T1, the 11st pin of transformer is connected to the ground of direct current output, the 12nd pin of transformer is connected to the anode of the Schottky diode D7 of direct current output.
Further, DC output circuit comprises Schottky diode D7, Schottky diode D8, inductance L 1 and electrochemical capacitor C10, the negative electrode of the negative electrode of Schottky diode D7 and Schottky diode D8 is connected to the positive pole of electrochemical capacitor C10 and the anodal output pin of direct current output by inductance L 1, and the negative pole of the anode of Schottky diode D8 and electrochemical capacitor C1O is connected to output ground.
Further, PWM drives chip, comprises electrochemical capacitor C3, PWM drives chip U1, resistance R 3, capacitor C 4, capacitor C 7, resistance R 4, capacitor C 6, resistance R 5, capacitor C 5, resistance R 6, N channel depletion type field effect transistor Q1 and resistance R 2, PWM drives the first pin of chip U1 to be connected to the 4th pin of U2 and U3, one end of resistance R 3 and capacitor C 4, the 4th pin of U2 and U3, the other end of resistance R 3 and capacitor C 4, PWM drives the 2nd pin of chip U1, the 5th pin ground connection, PWM drives the 3rd pin of chip U1 by capacitor C 6 ground connection, by resistance R 4, be connected to PWM and drive chip U1 the 8th pin, PWM drives the 4th pin of chip U1 by capacitor C 5 ground connection, by resistance R 5, be connected to one end of resistance R 2 and the source electrode of N channel depletion type field effect transistor Q1, the other end ground connection of resistance R 2, PWM drives the 6th pin of chip U1 by resistance R 6, to be connected to the gate pole of Q1, the drain electrode of N channel depletion type field effect transistor Q1 is connected to the 3rd pin of transformer, PWM drives the 7th pin of chip U1 to be connected with accessory power supply and passes through electrochemical capacitor C3 ground connection, and PWM drives the 8th pin of chip U1 by capacitor C 7 ground connection.
Further, the first voltage feedback circuit comprises resistance R 7, photoelectrical coupler U28, resistance R 8, diode D12, comparison amplifier U58, capacitor C 8, resistance R 9, resistance R 10, resistance R 11 and resistance R 12, accessory power supply is connected to the first pin of photoelectrical coupler U28 by resistance R 7, the second pin of photoelectrical coupler U2 is connected to the anode of diode D12 by resistance R 8, the negative electrode of diode D12 is connected to the 7th pin of comparison amplifier U58, and successively by capacitor C 8, resistance R 9 is connected to the 6th pin and the resistance R 11 of comparison amplifier U58, one end of resistance R 12, the other end of resistance R 11 is connected to the positive pole of DC output circuit, the other end of resistance R 12 is connected to the ground of DC output circuit, the 5th pin of comparison amplifier U58 is connected to reference voltage input terminal by resistance R 10, the 8th pin of comparison amplifier U58 is connected to the secondary output voltage of accessory power supply, the 4th pin of comparison amplifier U58 is connected to ground.
Further, second voltage feedback circuit comprises resistance R 13, photoelectrical coupler U38, one end of resistance R 13 is connected to the positive pole of DC output circuit, the other end of resistance R 13 is connected to the 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 that PWM drives chip.
The beneficial effects of the utility model are: by former charging device, increase second voltage feedback circuit and accessory power supply and change supply power mode and realize start, zero volt safely and fast and work the object of filling with the controlled output of multivoltage, not only realized 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 the object of energy savings.
Accompanying drawing explanation
Fig. 1 is existing charger circuit structured flowchart;
Fig. 2 is circuit structure block diagram of the present utility model;
Fig. 3 is circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figures 2 and 3, this two-stage safeguard protection FEEDBACK CONTROL charger, comprise ac input circuit, transformer, DC output circuit, PWM drives chip and the first voltage feedback circuit, ac input circuit is electrically connected to transformer, transformer is electrically connected to DC output circuit, DC output circuit is electrically connected to the first voltage feedback circuit, the first voltage feedback circuit drives chip to be electrically connected to PWM, also comprise second voltage feedback circuit and accessory power supply, DC output circuit is electrically connected to second voltage feedback circuit, second voltage feedback circuit drives chip to be electrically connected to PWM, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and PWM drive chip to be electrically connected to.Ac input circuit comprises live wire access pin L, zero line access pin N, fuse FS1, rectifier diode D1, rectifier diode D2, rectifier diode D3, rectifier diode D4 and electrochemical capacitor C1, live wire access pin L is connected to the anode of rectifier diode D1 and the negative electrode of rectifier diode D3 by fuse FS1, zero line access pin N is connected to the anode of rectifier diode D2 and the negative electrode of rectifier diode D4, the negative electrode of the negative electrode of rectifier diode D1 and rectifier diode D2 is connected to the positive pole of electrochemical capacitor C1, the anodic bonding of the anode of rectifier diode D3 and rectifier diode D4 is to the negative pole of electrochemical capacitor C1.Transformer comprises resistance R 1, capacitor C 2, rectifier diode D5, transformer T1 and rectifier diode D6, one end of resistance R 1 is connected to one end of capacitor C 2 and the first pin of T1, the other end of resistance R 1 is connected to the other end of capacitor C 2 and the negative electrode of rectifier diode D5, the anodic bonding of rectifier diode D5 is to the three-prong of transformer T1, the plus earth of rectifier diode D6, the negative electrode of rectifier diode D6 is connected to the second pin of transformer T1, the 11st pin of transformer is connected to the ground of direct current output, the 12nd pin of transformer is connected to the anode of the Schottky diode D7 of direct current output.DC output circuit comprises Schottky diode D7, Schottky diode D8, inductance L 1 and electrochemical capacitor C10, the negative electrode of the negative electrode of Schottky diode D7 and Schottky diode D8 is connected to the positive pole of electrochemical capacitor C10 and the anodal output pin of direct current output by inductance L 1, and the negative pole of the anode of Schottky diode D8 and electrochemical capacitor C1O is connected to output ground.PWM drives chip, comprises electrochemical capacitor C3, PWM drives chip U1, resistance R 3, capacitor C 4, capacitor C 7, resistance R 4, capacitor C 6, resistance R 5, capacitor C 5, resistance R 6, N channel depletion type field effect transistor Q1 and resistance R 2, PWM drives the first pin of chip U1 to be connected to the 4th pin of U2 and U3, one end of resistance R 3 and capacitor C 4, the 4th pin of U2 and U3, the other end of resistance R 3 and capacitor C 4, PWM drives the 2nd pin of chip U1, the 5th pin ground connection, PWM drives the 3rd pin of chip U1 by capacitor C 6 ground connection, by resistance R 4, be connected to PWM and drive chip U1 the 8th pin, PWM drives the 4th pin of chip U1 by capacitor C 5 ground connection, by resistance R 5, be connected to one end of resistance R 2 and the source electrode of N channel depletion type field effect transistor Q1, the other end ground connection of resistance R 2, PWM drives the 6th pin of chip U1 by resistance R 6, to be connected to the gate pole of Q1, the drain electrode of N channel depletion type field effect transistor Q1 is connected to the 3rd pin of transformer, PWM drives the 7th pin of chip U1 to be connected with accessory power supply and passes through electrochemical capacitor C3 ground connection, and PWM drives the 8th pin of chip U1 by capacitor C 7 ground connection.The first voltage feedback circuit comprises resistance R 7, photoelectrical coupler U28, resistance R 8, diode D12, comparison amplifier U58, capacitor C 8, resistance R 9, resistance R 10, resistance R 11 and resistance R 12, accessory power supply is connected to the first pin of photoelectrical coupler U28 by resistance R 7, the second pin of photoelectrical coupler U2 is connected to the anode of diode D12 by resistance R 8, the negative electrode of diode D12 is connected to the 7th pin of comparison amplifier U58, and successively by capacitor C 8, resistance R 9 is connected to the 6th pin and the resistance R 11 of comparison amplifier U58, one end of resistance R 12, the other end of resistance R 11 is connected to the positive pole of DC output circuit, the other end of resistance R 12 is connected to the ground of DC output circuit, the 5th pin of comparison amplifier U58 is connected to reference voltage input terminal by resistance R 10, the 8th pin of comparison amplifier U58 is connected to the secondary output voltage of accessory power supply, the 4th pin of comparison amplifier U58 is connected to ground.Second voltage feedback circuit comprises resistance R 13, photoelectrical coupler U38, one end of resistance R 13 is connected to the positive pole of DC output circuit, the other end of resistance R 13 is connected to the 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 that PWM drives chip.
Switching Power Supply charger for existing univoltage output, former secondary can with exchanging, input or direct current be exported or the power voltage supply work of the auxiliary winding rectification output of transformer, but work for ask for something single channel output multiple voltage, zero volt the charger that fills contour performance, because supply power voltage and output voltage have direct relation, this supply power mode can not meet demand, the problem that there will be high low-voltage to process, cause circuit uncontrollable, there is the phenomenons such as overcurrent-overvoltage, will burn out charger or battery.
For the charger of existing univoltage list electric current output, only with chips such as comparison amplifier, voltage-stabiliser tube or reference voltage voltage stabilizing chips, can well realize object.But for ask for something single channel output multiple voltage, zero volt, work the charger that fills contour performance, just must add microcontroller chip, desired various reference voltage is provided.
For the utility model charger, increase a road small-power, low cost, low-power consumption accessory power supply, not only can export multiple voltage, zero volt for single channel rises and the characteristic such as fills and realize basic function of supplying power, make the normal trouble free service of circuit, and the characteristic of its low-power consumption standby has advantages of energy savings.
For the utility model charger, use PWM to drive chip that various feedback reference voltage source is provided, realize the object of multivoltage output.
For the utility model charger, when starting the machine, when PWM drives chip reset initialization, each pin voltage state is uncontrolled, feedback voltage source is also just uncertain, in the time of may having startup, overvoltage burns out the dangerous phenomenon of charger, for preventing that this phenomenon from occurring, then increase the rapid-action second voltage feedback circuit that a road voltage-stabiliser tube forms, restriction maximum output voltage.And can, when charger is worked, as dual fail-safe, protect the generation of overvoltage phenomenon.
Claims (7)
1. a two-stage safeguard protection FEEDBACK CONTROL charger, comprise ac input circuit, transformer, DC output circuit, PWM drives chip and the first voltage feedback circuit, ac input circuit is electrically connected to transformer, transformer is electrically connected to DC output circuit, DC output circuit is electrically connected to the first voltage feedback circuit, the first voltage feedback circuit drives chip to be electrically connected to PWM, it is characterized in that, also comprise second voltage feedback circuit and accessory power supply, DC output circuit is electrically connected to second voltage feedback circuit, second voltage feedback circuit drives chip to be electrically connected to PWM, accessory power supply and the first voltage feedback circuit, second voltage feedback circuit and PWM drive chip to be electrically connected to.
2. a kind of two-stage safeguard protection FEEDBACK CONTROL charger according to claim 1, it is characterized in that, described ac input circuit comprises live wire access pin L, zero line access pin N, fuse FS1, rectifier diode D1, rectifier diode D2, rectifier diode D3, rectifier diode D4 and electrochemical capacitor C1, live wire access pin L is connected to the anode of rectifier diode D1 and the negative electrode of rectifier diode D3 by fuse FS1, zero line access pin N is connected to the anode of rectifier diode D2 and the negative electrode of rectifier diode D4, the negative electrode of the negative electrode of rectifier diode D1 and rectifier diode D2 is connected to the positive pole of electrochemical capacitor C1, the anodic bonding of the anode of rectifier diode D3 and rectifier diode D4 is to the negative pole of electrochemical capacitor C1.
3. a kind of two-stage safeguard protection FEEDBACK CONTROL charger according to claim 1, it is characterized in that, described transformer comprises resistance R 1, capacitor C 2, rectifier diode D5, transformer T1 and rectifier diode D6, one end of resistance R 1 is connected to one end of capacitor C 2 and the first pin of T1, the other end of resistance R 1 is connected to the other end of capacitor C 2 and the negative electrode of rectifier diode D5, the anodic bonding of rectifier diode D5 is to the three-prong of transformer T1, the plus earth of rectifier diode D6, the negative electrode of rectifier diode D6 is connected to the second pin of transformer T1, the 11st pin of transformer is connected to the ground of direct current output, the 12nd pin of transformer is connected to the anode of the Schottky diode D7 of direct current output.
4. a kind of two-stage safeguard protection FEEDBACK CONTROL charger according to claim 1; it is characterized in that; described DC output circuit comprises Schottky diode D7, Schottky diode D8, inductance L 1 and electrochemical capacitor C10; the negative electrode of the negative electrode of Schottky diode D7 and Schottky diode D8 is connected to the positive pole of electrochemical capacitor C10 and the anodal output pin of direct current output by inductance L 1, and the negative pole of the anode of Schottky diode D8 and electrochemical capacitor C1O is connected to output ground.
5. a kind of two-stage safeguard protection FEEDBACK CONTROL charger according to claim 1, is characterized in that, described PWM drives chip, comprises electrochemical capacitor C3, PWM drives chip U1, resistance R 3, capacitor C 4, capacitor C 7, resistance R 4, capacitor C 6, resistance R 5, capacitor C 5, resistance R 6, N channel depletion type field effect transistor Q1 and resistance R 2, PWM drives the first pin of chip U1 to be connected to the 4th pin of U2 and U3, one end of resistance R 3 and capacitor C 4, the 4th pin of U2 and U3, the other end of resistance R 3 and capacitor C 4, PWM drives the 2nd pin of chip U1, the 5th pin ground connection, PWM drives the 3rd pin of chip U1 by capacitor C 6 ground connection, by resistance R 4, be connected to PWM and drive chip U1 the 8th pin, PWM drives the 4th pin of chip U1 by capacitor C 5 ground connection, by resistance R 5, be connected to one end of resistance R 2 and the source electrode of N channel depletion type field effect transistor Q1, the other end ground connection of resistance R 2, PWM drives the 6th pin of chip U1 by resistance R 6, to be connected to the gate pole of Q1, the drain electrode of N channel depletion type field effect transistor Q1 is connected to the 3rd pin of transformer, PWM drives the 7th pin of chip U1 to be connected with accessory power supply and passes through electrochemical capacitor C3 ground connection, and PWM drives the 8th pin of chip U1 by capacitor C 7 ground connection.
6. a kind of two-stage safeguard protection FEEDBACK CONTROL charger according to claim 1, it is characterized in that, the first described voltage feedback circuit comprises resistance R 7, photoelectrical coupler U28, resistance R 8, diode D12, comparison amplifier U58, capacitor C 8, resistance R 9, resistance R 10, resistance R 11 and resistance R 12, accessory power supply is connected to the first pin of photoelectrical coupler U28 by resistance R 7, the second pin of photoelectrical coupler U2 is connected to the anode of diode D12 by resistance R 8, the negative electrode of diode D12 is connected to the 7th pin of comparison amplifier U58, and successively by capacitor C 8, resistance R 9 is connected to the 6th pin and the resistance R 11 of comparison amplifier U58, one end of resistance R 12, the other end of resistance R 11 is connected to the positive pole of DC output circuit, the other end of resistance R 12 is connected to the ground of DC output circuit, the 5th pin of comparison amplifier U58 is connected to reference voltage input terminal by resistance R 10, the 8th pin of comparison amplifier U58 is connected to the secondary output voltage of accessory power supply, the 4th pin of comparison amplifier U58 is connected to ground.
7. a kind of two-stage safeguard protection FEEDBACK CONTROL charger according to claim 1; it is characterized in that; described second voltage feedback circuit comprises resistance R 13, photoelectrical coupler U38; one end of resistance R 13 is connected to the positive pole of DC output circuit; the other end of resistance R 13 is connected to the 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 that PWM drives chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324793.8U CN204012794U (en) | 2014-06-18 | 2014-06-18 | Two-stage safeguard protection FEEDBACK CONTROL charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324793.8U CN204012794U (en) | 2014-06-18 | 2014-06-18 | Two-stage safeguard protection FEEDBACK CONTROL charger |
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| Publication Number | Publication Date |
|---|---|
| CN204012794U true CN204012794U (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420324793.8U Withdrawn - After Issue CN204012794U (en) | 2014-06-18 | 2014-06-18 | Two-stage safeguard protection FEEDBACK CONTROL charger |
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| CN (1) | CN204012794U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135043A (en) * | 2014-06-18 | 2014-11-05 | 徐州市恒源电器有限公司 | Two-stage safety protection feedback control charger |
-
2014
- 2014-06-18 CN CN201420324793.8U patent/CN204012794U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104135043A (en) * | 2014-06-18 | 2014-11-05 | 徐州市恒源电器有限公司 | Two-stage safety protection feedback control charger |
| CN104135043B (en) * | 2014-06-18 | 2016-08-24 | 徐州市恒源电器有限公司 | A kind of two-stage safeguard protection feedback control charger |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20160824 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |