CN202153656U - Switch power supply charger - Google Patents
Switch power supply charger Download PDFInfo
- Publication number
- CN202153656U CN202153656U CN2011202661053U CN201120266105U CN202153656U CN 202153656 U CN202153656 U CN 202153656U CN 2011202661053 U CN2011202661053 U CN 2011202661053U CN 201120266105 U CN201120266105 U CN 201120266105U CN 202153656 U CN202153656 U CN 202153656U
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- circuit
- power supply
- charger
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Abstract
The present utility model relates to a switch power supply charger which comprises a rectification circuit, a filter circuit and a voltage transformation circuit which are successively and electrically connected, and a drive circuit for controlling the voltage transformation circuit. The rectification circuit is electrically connected with an input power supply, and an output end of the voltage transformation circuit is connected with a battery. The switch power supply charger also comprises a battery detection circuit for providing a starting signal for the drive circuit when the connection of the battery and the output end of the voltage transformation circuit is detected. After powering the switch power supply charger, the voltage of an output port of the charger can be detected in real time, when the battery is connected with the output port, the drive circuit is stated and the charger is started to work as the voltage of the output port is detected by the charger, and if the battery is not connected with the output port after powering on, the output port is free of voltage output, thus the safety and the energy-saving performance of the charger can be ensured.
Description
Technical field
The utility model relates to charger, especially a kind of high frequency switch power charger.
Background technology
Rechargeable battery is used in growing field, corresponding, the fail safe of charger and the standard of reliability are also increasingly high.The safe charging control circuit of existing high frequency switch power charger generally includes constant current, constant voltage and temperature control, has higher fail safe and reliability.But existing charger is after connecting with the mains, and its output port has voltage output always.Therefore, even the charger output port does not connect battery, charger is also in work.Like this, output port probably can be short-circuited, and has potential safety hazard.Charger is being worked always in addition, also causes the waste of the energy.
Summary of the invention
The purpose of the utility model is to provide a kind of Switching Power Supply charger of when output port is connected to battery, just exporting charging voltage.
A kind of Switching Power Supply charger comprises successively the rectification circuit, filter circuit and the transforming circuit that are electrically connected, and the drive circuit that said transforming circuit is controlled.Wherein, rectification circuit is electrically connected with the input power supply, and the output of transforming circuit is connected with battery.This Switching Power Supply charger comprises that also one is the battery detection circuit that said drive circuit provides enabling signal when detecting battery and be connected to the output of said transforming circuit.
In a preferred embodiment, said battery detection circuit comprises optical coupler and switching tube.The input of said optical coupler is electrically connected with the output of said transforming circuit, and its high-voltage output terminal links to each other with control end with first end of said switching tube respectively with the low-voltage output.First end of said switching tube also is electrically connected with the output of said finishing circuit, and its second end links to each other with the power end of said drive circuit, is said drive circuitry.
In a preferred embodiment, said transforming circuit comprises transformer.Said transformer comprises former limit winding, a plurality of secondary winding, and the current rectifying and wave filtering circuit that links to each other with these a plurality of secondary windings.Former limit winding links to each other with drive circuit with said filter circuit.
In a preferred embodiment, first end of said switching tube also is connected with one of them secondary winding electric of said transforming circuit.
In a preferred embodiment, said battery detection circuit comprises that also a negative electrode links to each other with first end of said switching tube, the voltage stabilizing didoe of plus earth.
In a preferred embodiment, said Switching Power Supply charger also comprises the EMI filter that is connected between said rectification circuit and the input power supply.
In a preferred embodiment, said switching tube is a kind of in triode, insulated gate bipolar transistor and the metal-oxide semiconductor transistor.
Detect charger output port voltage after the Switching Power Supply charger of the utility model powers in real time, when battery was received output port, charger detects output port had voltage, and then drive circuit starts, and charger is started working, and is powered battery.If there is not battery to receive output port after powering on, then the output port no-voltage is exported, and has guaranteed the fail safe and the energy-efficient performance of charger.
Description of drawings
Fig. 1 is the circuit structure schematic diagram of the Switching Power Supply charger of an embodiment.
Embodiment
To combine specific embodiment and accompanying drawing that the utility model Switching Power Supply charger is described in further detail below.
As shown in Figure 1, in the preferred embodiment, the Switching Power Supply charger mainly comprises EMI (Electromagnetic Compatibility, Electro Magnetic Compatibility) circuit, rectification circuit, filter circuit and the transforming circuit that is electrically connected successively.Wherein, EMI circuit and input power supply for example exchange (AC) civil power and link to each other.The output Bat+ of transforming circuit, Bat-are connected with negative pole with the positive pole of battery respectively.The Switching Power Supply charger comprises that also the output Bat+ to transforming circuit, the voltage of Bat-detect to confirm whether battery receives the battery detection circuit of Switching Power Supply charger; And PWM (Pulse Width Modulation, the pulse width modulation) drive circuit that is used for transforming circuit is carried out power drive.Be that drive circuit provides enabling signal when battery detection circuit confirms that battery is received on the charger, make drive circuit begin to drive transforming circuit work, thereby transforming circuit begin to be battery charge.
In the present embodiment, EMI circuit, rectification circuit, filter circuit, transforming circuit and PWM drive circuit thereof all can adopt the circuit structure in the existing Switching Power Supply of using always.For example rectification circuit can adopt the diode full bridge rectifier.Transforming circuit comprises transformer, and this transformer can comprise two former limit windings, a plurality of secondary winding and the current rectifying and wave filtering circuit that links to each other with these a plurality of secondary windings.Two former limit windings can link to each other with drive circuit with filter circuit respectively, and a current rectifying and wave filtering circuit through correspondence in the secondary winding links to each other with output Bat+, the Bat-of transforming circuit.In the present embodiment, another secondary winding of transforming circuit provides voltage V2 through the current rectifying and wave filtering circuit of correspondence.
Battery detection circuit mainly comprises optical coupler U1, switching tube Q1 and voltage-stabiliser tube ZD.Optical coupler U1 comprises light-emitting diode and phototriode.Switching tube Q1 can be triode, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) or MOS (Metal-Oxid-Semiconductor, Metal-oxide-semicondutor) transistor.The anode of the light-emitting diode of optical coupler U1 links to each other with the output Bat+ of transforming circuit through resistance R 3, and its negative electrode links to each other with the output Bat-of transforming circuit.First end of collector electrode of phototriode (being the high-voltage output terminal of optical coupler U1) and switching tube Q1 is (like the collector electrode of triode; The drain electrode of IGBT or metal-oxide-semiconductor) links to each other; And link to each other with the output of rectification circuit through resistance R 1, also be connected in addition with the secondary winding electric of the output voltage V 2 of the negative electrode of voltage-stabiliser tube ZD and transforming circuit.The plus earth of voltage-stabiliser tube ZD.The emitter of phototriode (being the low-voltage output of optical coupler U1) links to each other with the control end (like the base stage of triode, the grid of IGBT or metal-oxide-semiconductor) of switching tube Q1.Second end of switching tube Q1 (like the emitter of triode, the source electrode of IGBT or metal-oxide-semiconductor) links to each other with the power end of PWM drive circuit, is the PWM drive circuitry.Second end of switching tube Q1 also links to each other with its control end through resistance R 2.
After the Switching Power Supply charger powered on, the output voltage of rectification circuit was V1, if there is not battery to insert, PWM drives and transforming circuit is not worked, and guarantees the fail safe and the green energy conservation performance of charger.When the both positive and negative polarity of battery inserts output Bat+ and the Bat-of charger respectively; Cell voltage is added in the light-emitting diode two ends of optical coupler U1 through resistance R 3; The light-emitting diode conducting is also luminous, and then the phototriode conducting of optical coupler U1, makes the voltage of the control end of switching tube Q1 become high level; Thereby also conducting of switching tube Q1, the output voltage V 1 that makes rectification circuit are provided to the power end of PWM drive circuit through resistance R 1 and switching tube Q1.The PWM drive circuit starts, and begins to drive transforming circuit work, is battery charge.Simultaneously, the power end of PWM drive circuit transfers the secondary winding power supply that the output voltage by transforming circuit is V2 to.Because the existence of voltage-stabiliser tube ZD, the power end of PWM drive circuit can obtain stable input voltage, guarantees the drive circuit reliability of operation.
Though the description to the utility model combines above specific embodiment to carry out,, those skilled in the art that can carry out many replacements, modification and variation according to above-mentioned content, be conspicuous.Therefore, all are such substitute, improve and change all is included in the spirit and scope of attached claim.
Claims (7)
1. Switching Power Supply charger; Comprise the rectification circuit, filter circuit and the transforming circuit that are electrically connected successively; And the drive circuit that said transforming circuit is controlled, wherein rectification circuit is electrically connected with the input power supply, and the output of transforming circuit is connected with battery; It is characterized in that, comprise that also one is the battery detection circuit that said drive circuit provides enabling signal when detecting battery and be connected to the output of said transforming circuit.
2. Switching Power Supply charger according to claim 1 is characterized in that said battery detection circuit comprises optical coupler and switching tube; The input of said optical coupler is electrically connected with the output of said transforming circuit, and its high-voltage output terminal links to each other with control end with first end of said switching tube respectively with the low-voltage output; First end of said switching tube also is electrically connected with the output of said finishing circuit, and its second end links to each other with the power end of said drive circuit, is said drive circuitry.
3. Switching Power Supply charger according to claim 2 is characterized in that said transforming circuit comprises transformer, and said transformer comprises former limit winding, a plurality of secondary winding, and the current rectifying and wave filtering circuit that links to each other with these a plurality of secondary windings; Former limit winding links to each other with drive circuit with said filter circuit.
4. Switching Power Supply charger according to claim 3 is characterized in that, first end of said switching tube also is connected with one of them secondary winding electric of said transforming circuit.
5. according to each described Switching Power Supply charger in the claim 1-4 item, it is characterized in that said battery detection circuit comprises that also a negative electrode links to each other with first end of said switching tube, the voltage stabilizing didoe of plus earth.
6. according to each described Switching Power Supply charger in the claim 1-4 item, it is characterized in that, also comprise the EMI filter that is connected between said rectification circuit and the input power supply.
7. Switching Power Supply charger according to claim 3 is characterized in that, said switching tube is a kind of in triode, insulated gate bipolar transistor and the metal-oxide semiconductor transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202661053U CN202153656U (en) | 2011-07-26 | 2011-07-26 | Switch power supply charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202661053U CN202153656U (en) | 2011-07-26 | 2011-07-26 | Switch power supply charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202153656U true CN202153656U (en) | 2012-02-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202661053U Expired - Fee Related CN202153656U (en) | 2011-07-26 | 2011-07-26 | Switch power supply charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202153656U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256829A (en) * | 2018-08-13 | 2019-01-22 | 浙江特康电子科技有限公司 | Charger output voltage auto-adjusting circuit |
| CN112737336A (en) * | 2020-12-28 | 2021-04-30 | 格力博(江苏)股份有限公司 | Voltage transformation module, charger, charging system and voltage transformation control method |
-
2011
- 2011-07-26 CN CN2011202661053U patent/CN202153656U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256829A (en) * | 2018-08-13 | 2019-01-22 | 浙江特康电子科技有限公司 | Charger output voltage auto-adjusting circuit |
| CN112737336A (en) * | 2020-12-28 | 2021-04-30 | 格力博(江苏)股份有限公司 | Voltage transformation module, charger, charging system and voltage transformation control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120229 Termination date: 20130726 |