CN210053390U - Output switch circuit of charger - Google Patents
Output switch circuit of charger Download PDFInfo
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- CN210053390U CN210053390U CN201920836237.1U CN201920836237U CN210053390U CN 210053390 U CN210053390 U CN 210053390U CN 201920836237 U CN201920836237 U CN 201920836237U CN 210053390 U CN210053390 U CN 210053390U
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Abstract
The utility model discloses an output switch circuit of a charger, which comprises an MOS tube switch unit, an output unit, a driving voltage unit, a voltage stabilizing unit and an optical coupler, wherein the MOS tube switch unit is connected between an AC-DC charging unit and the output unit, and the output unit is connected with a battery; the AC-DC charging unit is connected with a standby power supply and a single chip microcomputer unit, the optical coupler is connected with the voltage stabilizing unit and the single chip microcomputer unit, the output unit is connected with the single chip microcomputer unit, the MOS tube switching unit comprises a first MOS tube and a second MOS tube, the S pole of the first MOS tube is connected with the S pole of the second MOS tube, and the driving voltage unit comprises a group of winding groups which are added on a transformer in the standby power supply; the S pole of the first MOS tube and the S pole of the second MOS tube are both connected with a Va end, and the Va end is connected with the winding group to generate driving voltage. The utility model discloses a first MOS pipe and second MOS pipe are as output switch to replace the relay among the prior art, its long service life, and can not produce the noise at the during operation.
Description
The technical field is as follows:
the utility model relates to a charger technical field refers in particular to an output switch circuit of charger.
Background art:
the current battery charger, in response to the increase of battery capacity and the technological progress of battery materials, has faster charging speed requirement, the faster the speed represents the larger current output to shorten the charging time, the battery electric appliance generally has a charging switch at the output, which is used as the function of charging management, the output is reversely connected with MCU to judge the voltage error, the relay will not operate, the output is connected to the battery MCU, and then the relay is activated to start charging after the battery MCU judges that the battery is connected, the charger is fully charged, and the relay stops operating, that is, referring to FIG. 1, in the current charger with large current output, the relay is most commonly used as the output switch, the contact resistance of the action contact is very small, so that the relay is suitable for large current output, but the contact life of the mechanical contact and noise generated after action-stop are disadvantages of the relay.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
an object of the utility model is to overcome prior art's not enough, provide an output switch circuit of charger.
In order to solve the technical problem, the utility model discloses a following technical scheme: the output switch circuit of the charger comprises an MOS tube switch unit, an output unit, a driving voltage unit, a voltage stabilizing unit and an optical coupler, wherein the MOS tube switch unit is connected between an AC-DC charging unit and the output unit, and the output unit is connected with a battery; the AC-DC charging unit is connected with a standby power supply and a single chip microcomputer unit, the optical coupler is connected with the voltage stabilizing unit and the single chip microcomputer unit, the output unit is connected with the single chip microcomputer unit, the MOS tube switching unit comprises a first MOS tube and a second MOS tube, the S pole of the first MOS tube is connected with the S pole of the second MOS tube, and the driving voltage unit comprises a group of winding groups which are added on a transformer in the standby power supply; the S pole of the first MOS tube and the S pole of the second MOS tube are both connected with a Va end, and the Va end is connected with the winding group to generate driving voltage.
Further, in the above technical solution, the voltage regulation unit includes a voltage regulation diode VR51, a transistor Q53 and a diode D53, the transistor Q53 is connected to the optocoupler, the voltage regulation diode VR51 is connected to the Va terminal, the diodes D53 are connected to the winding group, a base of the transistor Q53 is connected to the voltage regulation diode VR51, a collector of the transistor Q53 is connected to the diode D53, and an emitter of the transistor Q53 is connected to a G pole of the first MOS transistor and a G pole of the second MOS transistor.
Furthermore, in the above technical solution, a resistor R53 is connected between the S-pole and the G-pole of the first MOS transistor, and the G-pole of the first MOS transistor is connected to the resistor R52 and then connected to the emitter of the transistor Q53.
Furthermore, in the above technical solution, a resistor R55 is connected between the S-pole and the G-pole of the second MOS transistor, and the G-pole of the second MOS transistor is connected to the resistor R54 and then connected to the emitter of the transistor Q53.
Furthermore, in the above technical solution, the Va terminal is connected to an electrolytic capacitor EC53, and the electrolytic capacitor EC53 is further connected to the diode D53.
Further, in the above technical solution, the output unit includes a resistor R190 and a capacitor C190 connected in parallel, and two ends of the capacitor C190 are connected to the single chip microcomputer unit.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses a first MOS pipe and second MOS pipe are as output switch to replace the relay among the prior art, and the S utmost point of this second MOS pipe is connected to the S utmost point of this first MOS pipe, so that the output can not have reverse leakage current, in addition increase a set of winding group on the transformer in stand-by power supply 8, the Va end is all connected to the S utmost point of first MOS pipe and the S utmost point of second MOS pipe, and this winding group is connected in order to produce driving voltage to this Va end. Therefore, the driving voltage is superposed with the driving voltage based on the voltage Va, and the driving voltage is at the very low output voltage of 1V (V)
S) Also superpose 12V equal driving voltage V
G-S12V, and outputs 13.4V (V) at the highest voltage
S) Also superpose 12V equal driving voltage V
G-S12V. That is, the first MOS transistor 11 and the second MOS transistor do not generate different V with the output voltage of the output unit floating
G-SAnd the principle of series voltage-stabilizing unit and optical coupling control is utilized to ensure that the V of the first MOS tube and the V of the second MOS tube are connected
GVoltage guarantees always that first MOS pipe and second MOS pipe can not puncture at 13V, and this first MOS pipe and second MOS pipe long service life, and can not produce the noise at the during operation, makes the utility model discloses extremely strong market competition has.
Description of the drawings:
FIG. 1 is a circuit diagram of an output switching circuit of a charger in the prior art;
fig. 2 is a circuit diagram of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
As shown in fig. 2, the output switch circuit of the charger includes a MOS transistor switch unit 1, an output unit 2, a driving voltage unit 3, a voltage stabilizing unit 4, and an optical coupler 5, where the MOS transistor switch unit 1 is connected between an AC-DC charging unit 6 and the output unit 2, and the output unit 2 is connected to a battery 7; the AC-DC charging unit 6 is connected to a standby power supply 8 and a single chip microcomputer unit 9, the optocoupler 5 is connected to the voltage stabilizing unit 4 and the single chip microcomputer unit 9, the output unit 2 is connected to the single chip microcomputer unit 9, the MOS switch unit 1 includes a first MOS transistor 11 and a second MOS transistor 12, an S-pole of the first MOS transistor 11 is connected to an S-pole of the second MOS transistor 12, and the driving voltage unit 3 includes a winding set 31 added to a transformer in the standby power supply 8; the S pole of the first MOS transistor 11 and the S pole of the second MOS transistor 12 are both connected to the Va terminal 10, and the Va terminal 10 is connected to the winding set 31 to generate the driving voltage. The utility model discloses a first MOS pipe 11 and second MOS pipe 12 are as output switch to replace the relay among the prior art, and this second MOS pipe 12 'S the S utmost point is connected to this first MOS pipe 11' S the S utmost point, so that the output can not have reverse leakage current, in addition increase a set of winding group 31 on the transformer in stand-by power supply 8, Va end 10 is all connected to first MOS pipe 11 'S the S utmost point and second MOS pipe 12' S the S utmost point, and this winding group 31 is connected in order to produce driving voltage to this Va end 10. Therefore, the driving voltage is superposed with the driving voltage based on the voltage Va, and the driving voltage is at the very low output voltage of 1V (V)
S) Also superpose 12V equal driving voltage V
G-S12V, and outputs 13.4V (V) at the highest voltage
S) Also superpose 12V equal driving voltage V
G-S12V. That is, the first MOS transistor 11 and the second MOS transistor 12 do not generate different V with the output voltage of the output unit floating
G-SIn addition, the principle of using the series voltage stabilizing unit and the opto-coupling control is utilized, so that the V of the first MOS transistor 11 and the V of the second MOS transistor 12 are enabled to be V
GThe voltage is always ensured to be 13V without breaking down the first MOS tube 11 and the second MOS tube 12, and the voltage isFirst MOS pipe 11 and second MOS pipe 12 long service life, and can not produce the noise at the during operation, the order the utility model discloses extremely strong market competition has.
The AC-DC charging unit 6, the standby power supply 8 and the single chip unit 9 are all in the prior art, and are not described in detail herein.
The voltage stabilizing unit 4 comprises a voltage stabilizing diode VR51, a triode Q53 and a diode D53, the triode Q53 is connected with the optocoupler 5, the voltage stabilizing diode VR51 is connected with the Va end 10, the diode D53 is connected with the winding group 31, the base of the triode Q53 is connected with the voltage stabilizing diode VR51, the collector of the triode Q53 is connected with the diode D53, the emitter of the triode Q53 is connected with the G pole of the first MOS transistor 11 and connected with the G pole of the second MOS transistor 12, so that the voltage stability of the output unit is better ensured, the first MOS transistor 11 and the second MOS transistor 12 are prevented from being broken down, and the service life of the first MOS transistor 11 and the second MOS transistor 12 is ensured to be broken down. A resistor R53 is connected between the S-pole and the G-pole of the first MOS transistor 11, and the G-pole of the first MOS transistor 11 is connected to the resistor R52 and then connected to the emitter of the triode Q53. A resistor R55 is connected between the S-pole and the G-pole of the second MOS transistor 12, and the G-pole of the second MOS transistor 12 is connected to the resistor R54 and then connected to the emitter of the triode Q53.
The Va end 10 is connected with an electrolytic capacitor EC53, and the electrolytic capacitor EC53 is also connected with the diode D53.
The output unit 2 comprises a resistor R190 and a capacitor C190 which are connected in parallel, and two ends of the capacitor C190 are connected with the singlechip microcomputer unit 9.
To sum up, the utility model discloses a first MOS pipe 11 and second MOS pipe 12 are as output switch to replace the relay among the prior art, and this second MOS pipe 12 'S the S utmost point is connected to this first MOS pipe 11' S S utmost point, so that the output can not have reverse leakage current, in addition increase a set of winding group 31 on the transformer among stand-by power supply 8, Va end 10 is all connected to first MOS pipe 11 'S the S utmost point and second MOS pipe 12' S S utmost point, and this winding group 31 is connected in order to produce driving voltage to this Va end 10. Therefore, the driving voltage is superposed with the driving voltage based on the voltage Va, and the driving voltage is at the very low output voltage of 1V (V)
S) Also superpose 12V equal driving voltage V
G-S12V, and outputs 13.4V (V) at the highest voltage
S) Also superpose 12V equal driving voltage V
G-S12V. That is, the first MOS transistor 11 and the second MOS transistor 12 do not generate different V with the output voltage of the output unit floating
G-SIn addition, the principle of using the series voltage stabilizing unit and the opto-coupling control is utilized, so that the V of the first MOS transistor 11 and the V of the second MOS transistor 12 are enabled to be V
GThe voltage is guaranteed always that 13V can not puncture first MOS pipe 11 and second MOS pipe 12, and this first MOS pipe 11 and second MOS pipe 12 long service life, and can not produce the noise at the during operation, the order the utility model discloses extremely strong market competition has.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. An output switch circuit of a charger, characterized in that: the power supply comprises an MOS tube switch unit (1), an output unit (2), a driving voltage unit (3), a voltage stabilizing unit (4) and an optical coupler (5), wherein the MOS tube switch unit (1) is connected between an AC-DC charging unit (6) and the output unit (2), and the output unit (2) is connected with a battery (7); the AC-DC charging unit (6) is connected with a standby power supply (8) and a single chip microcomputer unit (9), the optocoupler (5) is connected with the voltage stabilizing unit (4) and the single chip microcomputer unit (9), the output unit (2) is connected with the single chip microcomputer unit (9), the MOS tube switching unit (1) comprises a first MOS tube (11) and a second MOS tube (12), the S pole of the first MOS tube (11) is connected with the S pole of the second MOS tube (12), and the driving voltage unit (3) comprises a transformer in the standby power supply (8) and is additionally provided with a group of winding sets (31); the S pole of the first MOS tube (11) and the S pole of the second MOS tube (12) are both connected with a Va end (10), and the Va end (10) is connected with the winding group (31) to generate a driving voltage.
2. The output switching circuit of a charger according to claim 1, wherein: the voltage stabilizing unit (4) comprises a voltage stabilizing diode VR51, a triode Q53 and a diode D53, the triode Q53 is connected with the optocoupler (5), the voltage stabilizing diode VR51 is connected with the Va end (10), the diodes D53 are connected with the winding group (31), the base electrode of the triode Q53 is connected with the voltage stabilizing diode VR51, the collector electrode of the triode Q53 is connected with the diode D53, and the emitter electrode of the triode Q53 is connected with the G pole of the first MOS transistor (11) and is connected with the G pole of the second MOS transistor (12).
3. The output switching circuit of a charger according to claim 2, wherein: a resistor R53 is connected between the S pole and the G pole of the first MOS tube (11), and the G pole of the first MOS tube (11) is connected with a resistor R52 and then connected with the emitting electrode of the triode Q53.
4. The output switching circuit of a charger according to claim 2, wherein: a resistor R55 is connected between the S pole and the G pole of the second MOS tube (12), and the G pole of the second MOS tube (12) is connected with the emitter of the triode Q53 after being connected with the resistor R54.
5. The output switching circuit of a charger according to claim 2, wherein: the Va end (10) is connected with an electrolytic capacitor EC53, and the electrolytic capacitor EC53 is also connected with the diode D53.
6. The output switching circuit of a charger according to claim 2, wherein: the output unit (2) comprises a resistor R190 and a capacitor C190 which are connected in parallel, and two ends of the capacitor C190 are connected with the single chip microcomputer unit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920836237.1U CN210053390U (en) | 2019-06-03 | 2019-06-03 | Output switch circuit of charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920836237.1U CN210053390U (en) | 2019-06-03 | 2019-06-03 | Output switch circuit of charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210053390U true CN210053390U (en) | 2020-02-11 |
Family
ID=69397005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920836237.1U Active CN210053390U (en) | 2019-06-03 | 2019-06-03 | Output switch circuit of charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210053390U (en) |
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2019
- 2019-06-03 CN CN201920836237.1U patent/CN210053390U/en active Active
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