CN2735631Y - Output circuit for charger - Google Patents
Output circuit for charger Download PDFInfo
- Publication number
- CN2735631Y CN2735631Y CNU2004200441608U CN200420044160U CN2735631Y CN 2735631 Y CN2735631 Y CN 2735631Y CN U2004200441608 U CNU2004200441608 U CN U2004200441608U CN 200420044160 U CN200420044160 U CN 200420044160U CN 2735631 Y CN2735631 Y CN 2735631Y
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- CN
- China
- Prior art keywords
- triode
- electrode
- operational amplifier
- output
- positive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an output circuit for chargers. The technical problem is to improve the output limitation of fixing points of positive-negative poles. The output circuit for chargers comprises a power output electrode and a charging electrode for placing a rechargeable battery. A first electric pole of the charging electrode is connected with earth, and a second electric pole is connected with an emitter of a first triode, an emitter of a second triode, a positive input end and an inverse input of an operational amplifier. The output end of the operational amplifier is connected with the base electrode of the first triode and the base electrode of the second triode. A collector of the first triode is connected with the anode of a power output electrode. A collector of the second triode is connected with the cathode of the power output electrode. Compared with the prior art, the output circuit for chargers uses the positive input end and the inverse input end of the operational amplifier to identify polarities of batteries. The triodes are controlled by the output signal of the output end. The charging current is input to the anode of the rechargeable battery all the time. The operation is convenient.
Description
Technical field
The utility model relates to the output circuit of a kind of battery charger for mobile phone, particularly a kind of battery charger for mobile phone.
Background technology
Mobile phone brings great convenience for people's live and work, extensive use along with mobile phone, comfort level to battery charger for mobile phone requires also more and more higher, the battery charger for mobile phone of prior art has strict requirement to the polarity that is placed on battery of mobile phone to be charged wherein, be subjected to the restriction of the essential fixing point output of charger for mobile phone both positive and negative polarity, if the battery of mobile phone both positive and negative polarity is placed mistake, will cause the damage of rechargeable battery during charging.
Summary of the invention
The purpose of this utility model provides a kind of charger output circuit, and the technical problem that solve is to improve the restriction of battery charger for mobile phone both positive and negative polarity fixing point output.
The utility model is by the following technical solutions: a kind of charger output circuit, the charging electrode that comprises power supply output electrode and placement rechargeable battery, first electrode grounding of described charging electrode, the emitter of second electrode and first triode, the emitter of second triode, the positive input of operational amplifier is connected with reverse input end, the output of operational amplifier is connected with the base stage of first triode and the base stage of second triode, the collector electrode of first triode is connected with the power supply output electrode is anodal, and the collector electrode of second triode is connected with power supply output electrode negative pole.
Be serially connected with the 12 resistance between the base stage of the base stage of the output of the utility model operational amplifier and first triode and second triode, be serially connected with between second electrode of charging electrode and the operational amplifier positive input the 17 resistance, and and the operational amplifier reverse input end between be serially connected with the 15 resistance.
Be serially connected with a pair of diode connected in parallel that oppositely is provided with between the utility model operational amplifier positive input and the ground connection, be serially connected with the 16 resistance between the reverse input end of operational amplifier and the ground connection.
The utility model first triode adopts NPN type triode, and second triode adopts the positive-negative-positive triode, and operational amplifier adopts the homophase operational amplifier.
The string forward is connected to the 3rd diode between the emitter of the utility model first triode and second electrode of charging electrode, and forward is serially connected with the 4th diode between second electrode of the emitter of second triode and charging electrode.
The utility model compared with prior art, utilize the polarity of the positive input and the reverse input end identification battery of operational amplifier, the signal controlling triode of its output output, thereby the control charging current is imported from the positive pole of rechargeable battery all the time, make the polarity that when battery of mobile phone is charged, needn't carefully recognize charger, the convenient use, the damage accident that has caused because of the both positive and negative polarity reversal connection when effectively having avoided charging mobile phone battery simultaneously.
Description of drawings
Fig. 1 is the utility model embodiment (one's) circuit theory diagrams.
Fig. 2 is the utility model embodiment (twos') circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.As shown in Figure 1, charger output circuit of the present utility model, the charging electrode that comprises power supply output electrode and placement rechargeable battery, the first electrode P1 ground connection of charging electrode, the second electrode P2 is connected with the emitter of the first triode Q1 and the emitter of the second triode Q2, and be connected with the positive input of homophase operational amplifier U1A by the 17 resistance R 17, be connected by the reverse input end of the 15 resistance R 15 with homophase operational amplifier U1A, the output of homophase operational amplifier U1A is connected with the base stage of the first triode Q1 and the base stage of the second triode Q2 by the 12 resistance R 12, the collector electrode of the first triode Q1 is connected with power supply output electrode positive pole+VCC, and the collector electrode of the second triode Q2 is connected with power supply output electrode negative pole-VCC.Be serially connected with a pair of first diode D1 in parallel and the second diode D2 of oppositely being provided with between homophase operational amplifier U1A positive input and the ground connection, the amplitude that is used for restricting signal is serially connected with the 16 resistance R 16 between the reverse input end of homophase operational amplifier U1A and the ground connection.The first triode Q1 adopts NPN type triode, and the second triode Q2 adopts the positive-negative-positive triode.Saturation voltage V according to rechargeable battery
BT=V
D(R15/R16+1), the value of homophase operational amplifier, triode, diode and each resistance parameter is determined according to the voltage of rechargeable battery.
During work, be placed on the second electrode P2 of charging electrode when the positive pole of rechargeable battery, the signal of anode is imported forward voltage by the 17 resistance R 17 positive input of homophase operational amplifier U1A, the forward bias of the output output of homophase operational amplifier U1A makes the first triode Q1 conducting, and the electric current of power supply output electrode positive pole+VCC output charges to rechargeable battery through collector electrode, emitter, the positive pole of rechargeable battery, negative pole to the ground connection of the first triode Q1.
As shown in Figure 2, forward is serially connected with the 3rd diode D3 between the second electrode P2 of the emitter of the first triode Q1 and charging electrode, forward is serially connected with the 4th diode D4 between the second electrode P2 of the emitter of second triode and charging electrode, be placed on the first electrode P1 of charging electrode when the positive pole of rechargeable battery, the signal of battery cathode is imported reverse voltage by the 15 resistance R 15 reverse input end of homophase operational amplifier U1A, the reverse biased of the output output of homophase operational amplifier U1A makes the second triode Q2 conducting, and the electric current of power supply output electrode negative pole-VCC output is through the collector electrode of the second triode Q2, emitter, the negative pole of rechargeable battery, positive best ground connection is charged to rechargeable battery.
Claims (5)
1. charger output circuit, the charging electrode that comprises power supply output electrode and placement rechargeable battery, it is characterized in that: first electrode grounding of described charging electrode, second electrode is connected with reverse input end with the emitter of first triode, the emitter of second triode, the positive input of operational amplifier, the output of operational amplifier is connected with the base stage of first triode and the base stage of second triode, the collector electrode of first triode is connected with the power supply output electrode is anodal, and the collector electrode of second triode is connected with power supply output electrode negative pole.
2. charger output circuit according to claim 1, it is characterized in that: be serially connected with the 12 resistance between the base stage of the output of described operational amplifier and first triode and the base stage of second triode, be serially connected with between second electrode of charging electrode and the operational amplifier positive input the 17 resistance, and and the operational amplifier reverse input end between be serially connected with the 15 resistance.
3. charger output circuit according to claim 2, it is characterized in that: be serially connected with a pair of diode connected in parallel that oppositely is provided with between described operational amplifier positive input and the ground connection, be serially connected with the 16 resistance between the reverse input end of operational amplifier and the ground connection.
4. charger output circuit according to claim 3 is characterized in that: described first triode adopts NPN type triode, and second triode adopts the positive-negative-positive triode, and operational amplifier adopts the homophase operational amplifier.
5. charger output circuit according to claim 3, it is characterized in that: the string forward is connected to the 3rd diode between second electrode of the emitter of described first triode and charging electrode, and forward is serially connected with the 4th diode between second electrode of the emitter of second triode and charging electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200441608U CN2735631Y (en) | 2004-03-30 | 2004-03-30 | Output circuit for charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200441608U CN2735631Y (en) | 2004-03-30 | 2004-03-30 | Output circuit for charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2735631Y true CN2735631Y (en) | 2005-10-19 |
Family
ID=35265492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2004200441608U Expired - Fee Related CN2735631Y (en) | 2004-03-30 | 2004-03-30 | Output circuit for charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2735631Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172190A (en) * | 2018-01-15 | 2018-06-15 | 深圳市华星光电技术有限公司 | For the amplifying circuit of liquid crystal display |
| US10514562B2 (en) | 2018-01-15 | 2019-12-24 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Amplifier for LCD and LCD |
-
2004
- 2004-03-30 CN CNU2004200441608U patent/CN2735631Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172190A (en) * | 2018-01-15 | 2018-06-15 | 深圳市华星光电技术有限公司 | For the amplifying circuit of liquid crystal display |
| US10514562B2 (en) | 2018-01-15 | 2019-12-24 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Amplifier for LCD and LCD |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |