CN206807101U - Charging control circuit with CS compensation circuits - Google Patents
Charging control circuit with CS compensation circuits Download PDFInfo
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- CN206807101U CN206807101U CN201720538436.5U CN201720538436U CN206807101U CN 206807101 U CN206807101 U CN 206807101U CN 201720538436 U CN201720538436 U CN 201720538436U CN 206807101 U CN206807101 U CN 206807101U
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Abstract
The utility model discloses a kind of charging control circuit with CS compensation circuits,It includes AC input unit,EMC filter units,Rectification unit,Pfc controller unit,PWM controller unit,Transformer,Output rectification filter unit,DC output units,Feedback unit,The 5th pin in transformer as feedback voltage output pin is connected in the PWM controller unit after the one fast recovery diode D2 of the 6th pin connection of pwm chip,Wherein,5th pin of fast recovery diode D2 anode connection transformer,6th pin of fast recovery diode D2 negative electrode connection pwm chip,3rd pin of the pwm chip connects the negative electrode of connection fast recovery diode D2 after a voltage compensation resistance R18,3rd pin of the pwm chip is grounded after being also connected with a resistance R13 and current sampling resistor R14.The utility model can effectively avoid the generation of self-excitation, ensure charging quality and efficiency, make the utility model have the extremely strong market competitiveness.
Description
Technical field：
The charging circuit technical field of charger is the utility model is related to, refers in particular to a kind of charging control with CS compensation circuits
Circuit processed.
Background technology：
Charger typically refers to be converted in alternating current the device of low-voltage DC.Charger is wide in every field purposes
It is general, especially it is widely used in such as mobile phone, camera, electric toothbrush, electric razor or hair removal Device in sphere of life
Portable, personal uses electrical equipment.
The charging circuit of charger is in charging process in the prior art, in order to export more high-power, it is necessary to which electric current is taken
The resistance of sample resistance is reduced, but in underloading and full load, the CS pin voltages of pwm chip are relatively low to be easy for self-excitation occur,
That is pwm chip job insecurity, cause to influence charging quality and charge efficiency.
In view of this, the present inventor proposes following technical scheme.
Utility model content：
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of charging control with CS compensation circuits
Circuit processed.
In order to solve the above-mentioned technical problem, the utility model employs following technical proposals：This has CS compensation circuits
Charging control circuit includes：The AC input unit that is sequentially connected, EMC filter units, rectification unit, pfc controller unit and
The PWM controller unit that is connected with pfc controller unit, transformer, the output rectification filter unit, the DC that are connected with transformer are defeated
Go out unit, the feedback unit being connected between output rectification filter unit and PWM controller unit, the PWM controller unit
The 5th as feedback voltage output pin in transformer is connected after the one fast recovery diode D2 of the 6th pin connection of middle pwm chip
Pin, wherein, the 5th pin of fast recovery diode D2 anode connection transformer, fast recovery diode D2 negative electrode connection PWM
6th pin of control chip, the 3rd pin of the pwm chip connect connection fast recovery diode D2 after a voltage compensation resistance R18
Negative electrode, the 3rd pin of the pwm chip is grounded after being also connected with a resistance R13 and current sampling resistor R14.
Furthermore, in above-mentioned technical proposal, the model LD7575 of the pwm chip.
Furthermore, in above-mentioned technical proposal, the EMC filter units include be sequentially connected to AC input unit with
Common mode inductance L1, common mode inductance L2 between EMC filter units and be connected in parallel in common mode inductance L1 and common mode inductance L2 it
Between electric capacity C33 and electric capacity C34, the output rectification filter unit include and transformer and feedback unit and DC output units
The common mode inductance L5 of the connection and electric capacity C31 and electric capacity C32 for being connected in parallel and being serially connected with common mode inductance L5, the electric capacity
Also by being connected between a separated time and electric capacity C31 and electric capacity C32 between C33 and electric capacity C34.
Furthermore, in above-mentioned technical proposal, both ends that the common mode inductance L2 is connected with rectification unit be parallel with by
Bidirectional protective diode MOV1 and resistor AR1.
Furthermore, in above-mentioned technical proposal, the rectification unit is rectification bridge chip, its model GBU610.
Furthermore, in above-mentioned technical proposal, the feedback unit, which includes, is connected with each other and is connected to output rectification
Comparator and photo-coupler between filter unit and PWM controller unit, the comparator connect with photo-coupler and transformer.
After adopting the above technical scheme, the utility model has the advantages that compared with prior art：This practicality
It is new that battery is carried out in charging process, in order to export more high-power, it is necessary to which current sampling resistor R14 resistance is reduced, but
To be that the 3rd pin (CS pin) voltage of pwm chip is relatively low in underloading and full load, which be easy for, there is self-excitation (works shakiness
It is fixed), now, voltage compensation resistance R18 then compensates a voltage to the 3rd pin (CS pin) of pwm chip, so that PWM is controlled
3rd pin voltage of chip reaches requirement, can effectively avoid the generation of self-excitation, ensures charging quality and efficiency, makes this practicality
It is new that there is the extremely strong market competitiveness.
Brief description of the drawings：
Fig. 1 is circuit diagram of the present utility model.
Embodiment：
The utility model is further illustrated with reference to specific embodiments and the drawings.
As shown in Figure 1, it is a kind of charging control circuit with CS compensation circuits, it includes：The AC input being sequentially connected
Unit 1, EMC filter units 2, rectification unit 3, pfc controller unit 4 and the PWM controls being connected with pfc controller unit 4
Device unit 5, transformer 6, the output rectification filter unit 7 being connected with transformer 6, DC output units 8, be connected to output rectification filter
Feedback unit 9 between ripple unit 7 and PWM controller unit 5.
The EMC filter units 2 include the common mode electricity being sequentially connected between AC input unit 1 and EMC filter units 2
Feel L1, common mode inductance L2 and the electric capacity C33 and electric capacity C34 being connected in parallel between common mode inductance L1 and common mode inductance L2, with
This forms two-stage anti-interference function, ensures charging quality and efficiency.The both ends that the common mode inductance L2 is connected with rectification unit 3 are simultaneously
Be associated with prevents that electric current is excessive by bidirectional protective diode MOV1 and resistor AR1, resistor AR1, bidirectional protective diode
MOV1 plays clamping action, prevents influence of the unexpected rise of voltage forward or backwards to late-class circuit.
The rectification unit 3 is rectification bridge chip, its model GBU610.
The pfc controller unit 4 includes a PFC control chips 41 and is arranged at the periphery of PFC control chips 41
Peripheral circuit.
The 6th pin of pwm chip 51 connects change after connecting a fast recovery diode D2 in the PWM controller unit 5
The 5th pin in depressor 6 as feedback voltage output pin, wherein, the 5th of fast recovery diode D2 anode connection transformer 6 the
Pin, the 6th pin of fast recovery diode D2 negative electrode connection pwm chip 51, the 3rd pin connection of the pwm chip 51
Fast recovery diode D2 negative electrode is connected after one voltage compensation resistance R18, the 3rd pin of the pwm chip 51 is also connected with an electricity
It is grounded after resistance R13 and current sampling resistor R14.
The model LD7575 of the pwm chip 51.
The output rectification filter unit 7 includes to be total to what transformer 6 and feedback unit 9 and DC output units 8 were connected
Mould inductance L5 and the electric capacity C31 and electric capacity C32 for being connected in parallel and being serially connected with common mode inductance L5, electric capacity C33 and electric capacity
Also by being connected between a separated time and electric capacity C31 and electric capacity C32 between C34.
The feedback unit 9, which includes, is connected with each other and is connected to output rectification filter unit 7 and PWM controller unit 5
Between comparator 91 and photo-coupler 92, the comparator 91 and photo-coupler 92 and transformer 6 connect.The comparator 91 with
Reference voltage circuit 93 is connected between transformer 6, the reference voltage circuit includes a reference voltage source chip IC 4.The ratio
Compared with status display unit 94 is connected between device 91 and transformer 6, the status display unit 94 includes red-light LED and green glow
LED。
The utility model is carried out in charging process to battery, more high-power, it is necessary to current sampling resistor R14 in order to export
Resistance reduce, but in underloading and full load, the 3rd pin (CS pin) voltage of pwm chip is relatively low to be easy for self-excitation occur
(i.e. job insecurity), now, voltage compensation resistance R18 then compensate a voltage to the 3rd pin (CS pin) of pwm chip,
So that the 3rd pin voltage of pwm chip reaches requirement, the generation of self-excitation can be effectively avoided, ensures charging quality and effect
Rate, make the utility model that there is the extremely strong market competitiveness.
Certainly, specific embodiment of the utility model is the foregoing is only, is not to implement to limit the utility model
Scope, all equivalent change or modifications done according to construction, feature and principle described in present utility model application the scope of the claims, all should be wrapped
Include in present utility model application the scope of the claims.
Claims (6)
1. the charging control circuit with CS compensation circuits, it includes：AC input unit (1), the EMC filter units being sequentially connected
(2), rectification unit (3), pfc controller unit (4) and the PWM controller unit (5) being connected with pfc controller unit (4),
Transformer (6), the output rectification filter unit (7) being connected with transformer (6), DC output units (8), be connected to output rectification filter
Feedback unit (9) between ripple unit (7) and PWM controller unit (5),
It is characterized in that：The 6th pin of pwm chip (51) connects a fast recovery diode in the PWM controller unit (5)
The 5th pin in transformer (6) as feedback voltage output pin is connected after D2, wherein, fast recovery diode D2 anode connection
5th pin of transformer (6), the 6th pin of fast recovery diode D2 negative electrode connection pwm chip (51), PWM control cores
3rd pin of piece (51) connects the negative electrode of connection fast recovery diode D2 after a voltage compensation resistance R18, the pwm chip
(51) the 3rd pin is grounded after being also connected with a resistance R13 and current sampling resistor R14.
2. the charging control circuit according to claim 1 with CS compensation circuits, it is characterised in that：The PWM controls
The model LD7575 of chip (51).
3. the charging control circuit according to claim 1 with CS compensation circuits, it is characterised in that：The EMC filtering
Unit (2) includes the common mode inductance L1 being sequentially connected between AC input unit (1) and EMC filter units (2), common mode inductance
The L2 and electric capacity C33 being connected in parallel between common mode inductance L1 and common mode inductance L2 and electric capacity C34, the output rectification filter
Unit (7) includes the common mode inductance L5 that is connected with transformer (6) and feedback unit (9) and DC output units (8) and together
The electric capacity C31 and electric capacity C32 that mould inductance L5 is connected in parallel and is serially connected, also pass through one point between electric capacity C33 and electric capacity C34
Connected between line and electric capacity C31 and electric capacity C32.
4. the charging control circuit according to claim 3 with CS compensation circuits, it is characterised in that：The common mode inductance
L2 is parallel with by bidirectional protective diode MOV1 and resistor AR1 with the both ends that rectification unit (3) is connected.
5. the charging control circuit according to claim 4 with CS compensation circuits, it is characterised in that：The rectification unit
(3) it is rectification bridge chip, its model GBU610.
6. the charging control circuit with CS compensation circuits according to claim 1-5 any one, it is characterised in that：Institute
Feedback unit (9) is stated to include interconnection and be connected between output rectification filter unit (7) and PWM controller unit (5)
Comparator (91) and photo-coupler (92), the comparator (91) and photo-coupler (92) and transformer (6) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720538436.5U CN206807101U (en) | 2017-05-12 | 2017-05-12 | Charging control circuit with CS compensation circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720538436.5U CN206807101U (en) | 2017-05-12 | 2017-05-12 | Charging control circuit with CS compensation circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206807101U true CN206807101U (en) | 2017-12-26 |
Family
ID=60740955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720538436.5U Active CN206807101U (en) | 2017-05-12 | 2017-05-12 | Charging control circuit with CS compensation circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206807101U (en) |
-
2017
- 2017-05-12 CN CN201720538436.5U patent/CN206807101U/en active Active
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