CN204046163U - Multi-purposed charger output polarity reverse-connection protection circuit - Google Patents
Multi-purposed charger output polarity reverse-connection protection circuit Download PDFInfo
- Publication number
- CN204046163U CN204046163U CN201420445670.XU CN201420445670U CN204046163U CN 204046163 U CN204046163 U CN 204046163U CN 201420445670 U CN201420445670 U CN 201420445670U CN 204046163 U CN204046163 U CN 204046163U
- Authority
- CN
- China
- Prior art keywords
- resistance
- photoelectrical coupler
- nmos tube
- pnp triode
- output
- 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 - Lifetime
Links
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 claims abstract description 18
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 claims abstract description 18
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a kind of charger output polarity reverse-connection protection circuit, comprises resistance R1, R2, R3, R4, R5, R6, R7, NMOS tube Q1, Q3 and Q4, PNP triode Q2, photoelectrical coupler U1, voltage stabilizing didoe ZD1.One end of grid connecting resistance R1 of NMOS tube Q1 and the control end of MCU, the other end ground connection GND_1 of resistance R1; The source ground GND_1 of NMOS tube Q1, drain electrode connects photoelectrical coupler U1 input negative electrode; The one termination power VCC1 of resistance R2, the input anode of another termination photoelectrical coupler U1; Resistance R3 is connected in parallel between two inputs of photoelectrical coupler U1.The one termination power VCC1 of resistance R4, the emitter of another termination PNP triode Q2 and one end of resistance R5, the other end of base stage connecting resistance R5 of PNP triode Q2 and the output anode of photoelectrical coupler U1, etc.When accumulator polarity reversal connection, this circuit provides effective defencive function.
Description
Technical field
The utility model relates to a kind of charger circuit, especially a kind of charger output polarity reverse-connection protection circuit.
Background technology
Current storage battery is all widely used in all trades and professions, especially the storage battery of 12v voltage, in the vehicles such as boats and ships, automobile, all have use.
Charger is that storage battery provides electric energy, and electric energy conversion is that chemical energy stores by storage battery.The manual occasion connecting charging wires is needed, during terminals connecting charger output by storage battery, just in case error-polarity connection, then be very easy to the damage causing charger and storage battery at some.
Summary of the invention
The purpose of this utility model is to provide the reverse-connection protection circuit of the output polarity in a kind of charger; When error-polarity connection situation occurs in storage battery access, the connection with storage battery can be disconnected, plays a protective role.The technical solution adopted in the utility model is:
A kind of multi-purposed charger output polarity reverse-connection protection circuit, comprises resistance R1, R2, R3, R4, R5, R6, R7, NMOS tube Q1, Q3 and Q4, PNP triode Q2, photoelectrical coupler U1, voltage stabilizing didoe ZD1.
One end of grid connecting resistance R1 of NMOS tube Q1 and the control end of MCU, the other end ground connection GND_1 of resistance R1; The source ground GND_1 of NMOS tube Q1, drain electrode connects photoelectrical coupler U1 input negative electrode; The one termination power VCC1 of resistance R2, the input anode of another termination photoelectrical coupler U1; Resistance R3 is connected in parallel between two inputs of photoelectrical coupler U1.
The one termination power VCC1 of resistance R4, the emitter of another termination PNP triode Q2 and one end of resistance R5, the other end of base stage connecting resistance R5 of PNP triode Q2 and the output anode of photoelectrical coupler U1, and one end of resistance R6; The other end of collector electrode connecting resistance R6 of PNP triode Q2 and the output negative electrode of photoelectrical coupler U1.
The drain electrode of NMOS tube Q3 connects the output voltage V_out of stage circuit; The grid of NMOS tube Q3 meets power supply VCC1, and source electrode connects the output negative electrode of photoelectrical coupler U1.
The grid of NMOS tube Q4 meets power supply VCC1, and source electrode connects the output negative electrode of photoelectrical coupler U1, drains for connecting battery positive voltage; The anode of voltage stabilizing didoe connects NMOS tube Q3, the source electrode of Q4 and one end of resistance R7, and negative electrode connects the other end of power supply VCC1 and resistance R7.
The inner all occlusion body diodes of NMOS tube Q3 and Q4.
Circuit provided by the utility model, possesses good protective value, effectively can prevent the infringement that accumulator polarity reversal connection causes charger and storage battery self.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
A kind of multi-purposed charger output polarity reverse-connection protection circuit that the utility model proposes, as shown in Figure 1, comprises resistance R1, R2, R3, R4, R5, R6, R7, NMOS tube Q1, Q3 and Q4, PNP triode Q2, photoelectrical coupler U1, voltage stabilizing didoe ZD1;
One end of the grid connecting resistance R1 of NMOS tube Q1 and the control end (can be taken on by certain I/O mouth of MCU) of MCU, the other end ground connection GND_1 of resistance R1; The source ground GND_1 of NMOS tube Q1, drain electrode connects photoelectrical coupler U1 input negative electrode; The one termination power VCC1 of resistance R2, the input anode of another termination photoelectrical coupler U1; Resistance R3 is connected in parallel between two inputs of photoelectrical coupler U1; The voltage of power supply VCC1 is 12v;
The one termination power VCC1 of resistance R4, the emitter of another termination PNP triode Q2 and one end of resistance R5, the other end of base stage connecting resistance R5 of PNP triode Q2 and the output anode of photoelectrical coupler U1, and one end of resistance R6; The other end of collector electrode connecting resistance R6 of PNP triode Q2 and the output negative electrode of photoelectrical coupler U1;
The drain electrode of NMOS tube Q3 connects the output voltage V_out of stage circuit; Upper level circuit comprises secondary commutation filter circuit in charger and output split circuit (including the relay being controlled by MCU), and when charger normally works, the relay adhesive in output split circuit, can export V_out is 13 ~ 16v.The grid of NMOS tube Q3 meets power supply VCC1, and source electrode connects the output negative electrode of photoelectrical coupler U1;
The grid of NMOS tube Q4 meets power supply VCC1, and source electrode connects the output negative electrode of photoelectrical coupler U1, drains for connecting battery positive voltage; The anode of voltage stabilizing didoe connects NMOS tube Q3, the source electrode of Q4 and one end of resistance R7, and negative electrode connects the other end of power supply VCC1 and resistance R7.
In foregoing circuit, photoelectrical coupler U1 selects TLP190B; The value of resistance R4 is very little, 1 ~ 4.7 ohm, and an experiment value is as 2.7 ohm; NMOS tube Q3 and Q4 selects power MOS pipe, inner all occlusion body diodes.
Operation principle of the present utility model is:
When MCU detects that storage battery normally accesses (not having reversal connection), and when there is V_out voltage, the control end of MCU exports a high level, make NMOS tube Q1 conducting, then photoelectrical coupler U1 conducting, voltage between two outputs of photoelectrical coupler U1 makes to there is the voltage difference being greater than its conducting voltage between the grid of NOMS pipe Q3 and source electrode, NMOS tube Q3 conducting; And electric current flows to drain electrode through body diode from source electrode in NMOS tube Q4, namely now electric current can flow to battery positive voltage, then normally charge.
When MCU detects reverse connection of accumulator; then control end exports a low level; NNMOS pipe Q1 is turned off; photoelectrical coupler U1 also turns off, then the abundant conducting of triode Q2, because resistance R4 value is very little; make pressure reduction between the grid of NMOS tube Q3 and Q4, source electrode very little; NMOS tube Q3 and Q4 turns off, and cuts off output current, protects storage battery.
Claims (3)
1. a multi-purposed charger output polarity reverse-connection protection circuit, is characterized in that: comprise resistance R1, R2, R3, R4, R5, R6, R7, NMOS tube Q1, Q3 and Q4, PNP triode Q2, photoelectrical coupler U1, voltage stabilizing didoe ZD1;
One end of grid connecting resistance R1 of NMOS tube Q1 and the control end of MCU, the other end ground connection GND_1 of resistance R1; The source ground GND_1 of NMOS tube Q1, drain electrode connects photoelectrical coupler U1 input negative electrode; The one termination power VCC1 of resistance R2, the input anode of another termination photoelectrical coupler U1; Resistance R3 is connected in parallel between two inputs of photoelectrical coupler U1;
The one termination power VCC1 of resistance R4, the emitter of another termination PNP triode Q2 and one end of resistance R5, the other end of base stage connecting resistance R5 of PNP triode Q2 and the output anode of photoelectrical coupler U1, and one end of resistance R6; The other end of collector electrode connecting resistance R6 of PNP triode Q2 and the output negative electrode of photoelectrical coupler U1;
The drain electrode of NMOS tube Q3 connects the output voltage V_out of stage circuit; The grid of NMOS tube Q3 meets power supply VCC1, and source electrode connects the output negative electrode of photoelectrical coupler U1;
The grid of NMOS tube Q4 meets power supply VCC1, and source electrode connects the output negative electrode of photoelectrical coupler U1, drains for connecting battery positive voltage; The anode of voltage stabilizing didoe connects NMOS tube Q3, the source electrode of Q4 and one end of resistance R7, and negative electrode connects the other end of power supply VCC1 and resistance R7;
The inner all occlusion body diodes of NMOS tube Q3 and Q4.
2. multi-purposed charger output polarity reverse-connection protection circuit as claimed in claim 1, is characterized in that:
Photoelectrical coupler U1 adopts TLP190B.
3. multi-purposed charger output polarity reverse-connection protection circuit as claimed in claim 1, is characterized in that:
The value of resistance R4 is 1 ~ 4.7 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420445670.XU CN204046163U (en) | 2014-08-07 | 2014-08-07 | Multi-purposed charger output polarity reverse-connection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420445670.XU CN204046163U (en) | 2014-08-07 | 2014-08-07 | Multi-purposed charger output polarity reverse-connection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204046163U true CN204046163U (en) | 2014-12-24 |
Family
ID=52246791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420445670.XU Expired - Lifetime CN204046163U (en) | 2014-08-07 | 2014-08-07 | Multi-purposed charger output polarity reverse-connection protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204046163U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328717A (en) * | 2017-07-06 | 2017-11-07 | 浙江工业大学 | A kind of sensing integrated circuit monitored for blood oxygen concentration |
-
2014
- 2014-08-07 CN CN201420445670.XU patent/CN204046163U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328717A (en) * | 2017-07-06 | 2017-11-07 | 浙江工业大学 | A kind of sensing integrated circuit monitored for blood oxygen concentration |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203761022U (en) | High-efficiency direct-current input protection circuit | |
| CN202917976U (en) | Protective device of solar energy LED power supply input polarity reversal connection | |
| CN205212423U (en) | Protection circuit of electric motor car intelligent charging ware | |
| CN203313144U (en) | Backflow prevention circuit | |
| WO2017020782A1 (en) | Battery charging and discharging control circuit and battery charging and discharging system | |
| CN206099459U (en) | A activation circuit for battery management system | |
| CN202586793U (en) | Photovoltaic grid-connected inverter with input reverse-connection protection | |
| CN205725042U (en) | Electric automobile charging pile accessory power supply 12V, 24V compatibility charging circuit | |
| CN204103466U (en) | A kind of metal-oxide-semiconductor type solar recharging protective circuit | |
| CN203963189U (en) | Be applied to the self locking type control circuit that valve is controlled | |
| CN204046163U (en) | Multi-purposed charger output polarity reverse-connection protection circuit | |
| CN204089330U (en) | A kind of adaptive power-supply battery supplies power with double circuit device | |
| CN203708096U (en) | Power supply protection circuit and power supply | |
| CN207705835U (en) | A kind of low power consumpting controling circuit for high-voltage battery system | |
| CN203481904U (en) | Charger with battery reverse connection detection and protection functions | |
| CN103633675B (en) | Battery charger polarity Adaptable System | |
| CN203537008U (en) | Large current circuit of preventing battery reverse connection | |
| CN203205871U (en) | Direct current reverse protection circuit | |
| CN204681087U (en) | Solar charging device anti-surge circuit | |
| CN204205574U (en) | A kind of over-discharge protection circuit | |
| CN203645623U (en) | Solar controller PV self-starting and reverse connection alarm circuit | |
| CN204886286U (en) | No quiescent power dissipation charger | |
| CN204103534U (en) | The pre-charge circuit of controller for electric vehicle electric capacity | |
| CN204578363U (en) | A kind of bidirectional electronic switch for photovoltaic controller and drive circuit | |
| CN203989869U (en) | Remote-controlled toy vehicle charging detects automatic power-off circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |