CN205846782U - A kind of intelligence transformation USB quick-charging circuit - Google Patents
A kind of intelligence transformation USB quick-charging circuit Download PDFInfo
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- CN205846782U CN205846782U CN201620701073.8U CN201620701073U CN205846782U CN 205846782 U CN205846782 U CN 205846782U CN 201620701073 U CN201620701073 U CN 201620701073U CN 205846782 U CN205846782 U CN 205846782U
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Abstract
The utility model discloses a kind of intelligence transformation USB quick-charging circuit, belong to charging circuit field.This utility model includes USB interface, charging identification circuit, power-switching circuit, EMC circuit, input filter circuit and output filter circuit, charging identification circuit connects D+ pin and the D pin of USB interface, power-switching circuit is connected by switching logic with charging identification circuit, input filter circuit is connected with the power input of power-switching circuit, and EMC circuit and output filter circuit are connected with the power output end of power-switching circuit respectively.This utility model distinguishes the charging voltage of required by electronic product by charging identification circuit, and the charging voltage signal that power-switching circuit distinguishes according to charging identification circuit exports corresponding charging voltage, it is achieved different electronic products are carried out quick charge；There is overvoltage, overcurrent and short-circuit protection function, and anti-electromagnetic interference capability, safe and reliable, good operating stability.
Description
Technical field
This utility model relates to a kind of charging circuit, more particularly, it relates to a kind of intelligence transformation USB quick charge electricity
Road.
Background technology
Along with the economic and fast development of science and technology, the living standard of people improves constantly, the electronic product of carried type
Also getting more and more, such as mobile phone, panel computer and notebook computer etc., these mobile electronic products are used mostly lithium battery and provide
Electric energy, needs often its charging.
Due to the charger model also disunity that mobile digital product category the most on the market is various, original-pack, various electricity
Sub-product needed provide respective charger, and if charger does not mates with electronic product, then there will be do not charge shows
As, even if can charge, there is larger difference in charging voltage and original-pack charger voltage, will also result in the extra damage of battery
Consumption, shortens the service life of battery.For this problem, the most also occur in that many Intelligent Recognition chargers, this fill
Electricity equipment according to conventional charge protocol BC1.2 and QC2.0 etc., can identify D+ and the D-signal of electronic product charge port, root
According to the charging voltage of the signal intelligent conversion coupling electronic product identified, if intelligent conversion is 5V, 9V or 12V.But, at present
In these Intelligent Recognition chargers, they all lack the function such as overvoltage protection, short-circuit protection, and safety in utilization is poor, and
And anti-electromagnetic interference capability is poor, causes charging circuit job insecurity, affect charge efficiency.
Summary of the invention
1. utility model to solve the technical problem that
The purpose of this utility model is to overcome deficiencies of the prior art, it is provided that a kind of intelligence transformation USB is fast
Speed charging circuit, uses the technical solution of the utility model, is distinguished the charged electrical of required by electronic product by charging identification circuit
Pressure, the charging voltage signal that power-switching circuit distinguishes according to charging identification circuit exports corresponding charging voltage, it is achieved right
Different electronic products carry out quick charge；This charging circuit has overvoltage, overcurrent protection and short-circuit protection function simultaneously, makes
With safe and reliable, also there is good anti-electromagnetic interference capability, good operating stability.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that this utility model provides is:
A kind of intelligence transformation USB quick-charging circuit of the present utility model, including USB interface, charging identification circuit and electricity
Power-switching circuit, described charging identification circuit connects D+ pin and the D-pin of USB interface, in identifying electronic product
Charging voltage signal, described power-switching circuit is connected by switching logic with charging identification circuit, for according to filling
The charging voltage signal of electricity identification circuit identification provides corresponding charging output voltage, also includes EMC circuit, input filter circuit
And output filter circuit, described input filter circuit is connected with the power input of power-switching circuit, described EMC circuit
It is connected with the power output end of power-switching circuit respectively with output filter circuit.
Further, described power-switching circuit includes that voltage conversion chip U1, frequency compensated circuit, overvoltage are protected
Protection circuit and circuit overcurrent protection, the model of described voltage conversion chip U1 is ACT4533C, described frequency compensation electricity
Road is connected with the Comp pin of voltage conversion chip U1, and described excess voltage protection draws with the OVP of voltage conversion chip U1
Foot connects, and described circuit overcurrent protection is connected with the Iset pin of voltage conversion chip U1.
Further, described charging identification circuit includes identification chip U2, short-circuit protection circuit and bleeder circuit, institute
The model of the identification chip U2 stated is FP6601-S6B, and described short-circuit protection circuit is connected with the Vdd pin of identification chip U2,
The D+ pin of described identification chip U2 and D-pin are connected with D+ pin and the D-pin of USB interface respectively, described identification
Sens1 and the sens2 pin of chip U2 connects the FB pin of voltage conversion chip U1 respectively by bleeder circuit.
Further, after described EMC circuit includes electric capacity C6 and resistance R6, described electric capacity C6 and resistance R6 series connection
In parallel with a diode D1, the negative pole of described diode D1 connects the SW pin of voltage conversion chip U1, diode D1 just
Pole ground connection；Also by a resistance between SW pin and the HSB pin of voltage conversion chip U1 of described voltage conversion chip U1
A R21 and electric capacity C5 connects.
Further, described input filter circuit includes electric capacity C0, electric capacity C1 and electric capacity C2, described electric capacity C0,
After electric capacity C1 and electric capacity C2 parallel connection, one end is connected with the Vin pin of voltage conversion chip U1, other end ground connection, described voltage
The Vin pin of conversion chip U1 sequentially passes through an a diode D0 and inductance L0 and connects the Vin end of power supply；Described output filtering
Circuit includes electric capacity C7, electric capacity C8 and electric capacity C11, and after described electric capacity C7, electric capacity C8 and electric capacity C11 parallel connection, one end is through one
Inductance L1 connects the SW pin of voltage conversion chip U1 and connects the FB pin of voltage conversion chip U1 through a resistance R9, another
End ground connection, described inductance L1 connects the V+ pin of USB interface.
Further, described frequency compensated circuit includes resistance R2, electric capacity C3 and electric capacity C4, described resistance R2 and
Electric capacity C3 is in parallel with electric capacity C4 after connecting, and one end of described electric capacity C4 connects the Comp pin of voltage conversion chip U1, another
End ground connection.
Further, described excess voltage protection includes resistance R3 and resistance R4, described voltage conversion chip
The OVP pin of U1 is connected with the V+ pin of USB interface through resistance R3, and the OVP pin of voltage conversion chip U1 is through resistance R4
Ground connection；Described circuit overcurrent protection includes that the Iset of termination voltage conversion chip U1 of a resistance R1, this resistance R1 draws
Foot, other end ground connection.
Further, described bleeder circuit includes resistance R7, resistance R10 and resistance R11, described resistance R7 and electricity
After resistance R10 parallel connection, one end connects the sens1 pin of identification chip U2, and the other end connects the FB pin of voltage conversion chip U1；Institute
The one end of the resistance R11 stated connects the sens2 pin of identification chip U2, and the other end connects the FB pin of voltage conversion chip U1.
Further, described short-circuit protection circuit includes resistance R8 and electric capacity C10, described identification chip U2's
Vdd pin connects the V+ pin of USB interface through resistance R8, and the Vdd pin of identification chip U2 is through electric capacity C10 ground connection.
Further, also include that power supply indicator circuit, described power supply indicator circuit include resistance R19, voltage stabilizing
After diode Z1 and light emitting diode Led, described Zener diode Z1 and light emitting diode Led parallel connection, one end is through resistance
R19 connects the V+ pin of USB interface, other end ground connection.
3. beneficial effect
The technical scheme using this utility model to provide, compared with existing known technology, has the advantages that
(1) a kind of intelligence transformation USB quick-charging circuit of the present utility model, it distinguishes electronics by charging identification circuit
Charging voltage needed for product, the charging voltage signal that power-switching circuit distinguishes according to charging identification circuit exports accordingly
Charging voltage, it is achieved different electronic products are carried out quick charge；And utilize EMC circuit and filter circuit to improve circuit work
Make stability, there is good anti-electromagnetic interference capability；
(2) a kind of intelligence transformation USB quick-charging circuit of the present utility model, its power-switching circuit includes that voltage is changed
Chip U1, frequency compensated circuit, excess voltage protection and circuit overcurrent protection, the model of voltage conversion chip U1 is
ACT4533C, by the out-put supply that 10.5～16V Power convert are 5V or 9V or 12V of input, working stability, and can have
Overvoltage protection and excess current protective function, safe and reliable；
(3) a kind of intelligence transformation USB quick-charging circuit of the present utility model, its charging identification circuit includes identification chip
U2, short-circuit protection circuit and bleeder circuit, the model of identification chip U2 is FP6601-S6B, and identification chip U2 can be compatible in identification
The charge protocol such as BC1.2 and QC2.0, can meet the major part electronic product such as mobile phone, panel computer on the market, and it is short to have circuit
Road defencive function, improves safety in utilization, reduces rate of breakdown.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of intelligence transformation USB quick-charging circuit of the present utility model；
Fig. 2 is the circuit diagram of a kind of intelligence transformation USB quick-charging circuit of the present utility model.
Label declaration in schematic diagram:
10, EMC circuit；20, output filter circuit；30, input filter circuit；40, frequency compensated circuit；50, overvoltage
Protection circuit；60, bleeder circuit；70, short-circuit protection circuit；80, power supply indicator circuit.
Detailed description of the invention
For further appreciating that content of the present utility model, in conjunction with the accompanying drawings and embodiments this utility model is described in detail.
Embodiment
Shown in Fig. 1, a kind of intelligence transformation USB quick-charging circuit of the present embodiment, know including USB interface, charging
Other circuit and power-switching circuit, charging identification circuit connects D+ pin and the D-pin of USB interface, is used for identifying electronic product
Interior charging voltage signal, power-switching circuit is connected by switching logic CTL with charging identification circuit, for according to filling
The charging voltage signal of electricity identification circuit identification provides corresponding charging output voltage, and such as electronic product is through overcharge identification electricity
When road is identified as the 5V charging system being compatible to QC2.0, then charging identification circuit can control power-switching circuit by output voltage
5V is switched to export；As when overcharge identification circuit is identified as the 9V charging system being compatible to QC2.0, then charge identification circuit
Can control power-switching circuit switches to 9V to export output voltage；As being identified as being compatible to QC2.0 through overcharge identification circuit
12V charging system time, then charging identification circuit can control power-switching circuit and switches to 12V to export output voltage, thus
The different electronic product of coupling, it is achieved different electronic products are carried out quick charge.As in figure 2 it is shown, a kind of intelligence of the present embodiment
Transformation USB quick-charging circuit, also includes EMC circuit 10, input filter circuit 30 and output filter circuit 20, input filter electricity
Road 30 is connected with the power input of power-switching circuit, and EMC circuit 10 and output filter circuit 20 are electric with Power convert respectively
The power output end on road connects, and utilizes EMC circuit and filter circuit to improve circuit job stability, has good anti-electromagnetism
Interference performance, and electronic product causes electromagnetic interference by the work prevented also from charging circuit.
Shown in hookup 2, the power-switching circuit in the present embodiment includes voltage conversion chip U1, frequency compensated circuit
40, excess voltage protection 50 and circuit overcurrent protection, the model of voltage conversion chip U1 is ACT4533C, ACT4533C core
Sheet be Active-Semi release supper-fast portable power source charge prepd, there is quick-charge function, can by input 10.5～
16V Power convert is the out-put supply of 5V or 9V or 12V, working stability, this ACT4533C chip has HSB pin, Vin draws
Foot, SW pin, Gnd pin, FB pin, Comp pin, OVP pin and Iset pin, frequency compensated circuit 40 is changed with voltage
The Comp pin of chip U1 connects, and excess voltage protection 50 is connected with the OVP pin of voltage conversion chip U1, overcurrent protection
Circuit is connected with the Iset pin of voltage conversion chip U1, and Vin pin is connected with the Vin end of power supply, Gnd pin ground connection.Charging
Identification circuit includes identification chip U2, short-circuit protection circuit 70 and bleeder circuit 60, and the model of identification chip U2 is FP6601-
S6B, FP6601-S6B chip is that the most perfect QC2.0 fills identification chip soon at present, and volume is little, function is complete, a holding equipment is many, can
Identification is compatible to BC1.2 and QC2.0 charge protocol, can meet the major part electronic product such as mobile phone, panel computer on the market,
FP6601-S6B chip has D+, D-pin, Vdd pin, Gnd pin and sens1, a sens2 pin, short-circuit protection circuit 70 with
The Vdd pin of identification chip U2 connects, and the D+ pin of identification chip U2 and D-pin D+ pin and D-with USB interface respectively draws
Foot connects, and the FB that sens1 and the sens2 pin of identification chip U2 connects voltage conversion chip U1 by bleeder circuit 60 respectively draws
Foot.Foregoing circuit, has overvoltage protection, excess current protective function, safe and reliable, has short circuit protection merit simultaneously
Can, improve safety in utilization, reduce rate of breakdown.
Specifically, with one or two poles after above-mentioned EMC circuit 10 includes electric capacity C6 and resistance R6, electric capacity C6 and resistance R6 series connection
Pipe D1 is in parallel, and the negative pole of diode D1 connects the SW pin of voltage conversion chip U1, diode D1 plus earth；Voltage is changed
It is connected also by an a resistance R21 and electric capacity C5 between SW pin and the HSB pin of voltage conversion chip U1 of chip U1, it is provided that
MOS within voltage conversion chip U1 drives.Input filter circuit 30 includes electric capacity C0, electric capacity C1 and electric capacity C2, electric capacity C0, electricity
After holding C1 and electric capacity C2 parallel connection, one end is connected with the Vin pin of voltage conversion chip U1, other end ground connection, voltage conversion chip
The Vin pin of U1 sequentially passes through an a diode D0 and inductance L0 and connects the Vin end of power supply.Output filter circuit 20 includes electric capacity
After C7, electric capacity C8 and electric capacity C11, electric capacity C7, electric capacity C8 and electric capacity C11 parallel connection, one end connects voltage conversion through an inductance L1
The SW pin of chip U1 and connect the FB pin of voltage conversion chip U1 through a resistance R9, other end ground connection, inductance L1 meets USB
The V+ pin of interface.Above-mentioned filter circuit ensure that the stability that quick-charging circuit works.
Above-mentioned frequency compensated circuit 40 includes resistance R2, electric capacity C3 and electric capacity C4, after resistance R2 and electric capacity C3 series connection with
Electric capacity C4 is in parallel, and one end of electric capacity C4 connects the Comp pin of voltage conversion chip U1, other end ground connection.Excess voltage protection
50 include resistance R3 and resistance R4, and the OVP pin of voltage conversion chip U1 is connected with the V+ pin of USB interface through resistance R3,
The OVP pin of voltage conversion chip U1 is through resistance R4 ground connection, when charging circuit output is not enough, and can be by checking resistance R4
Whether open circuit is checked, it is simple to fault detect.Circuit overcurrent protection includes a termination voltage conversion of a resistance R1, this resistance R1
The Iset pin of chip U1, other end ground connection, arranged by maximum current by Iset pin, prevent the feelings money of overload,
Ensure charging safety.
After above-mentioned bleeder circuit 60 includes resistance R7, resistance R10 and resistance R11, resistance R7 and resistance R10 parallel connection, one
End connects the sens1 pin of identification chip U2, and the other end connects the FB pin of voltage conversion chip U1；One end of resistance R11 is even
Connecing the sens2 pin of identification chip U2, the other end connects the FB pin of voltage conversion chip U1, and the FB of voltage conversion chip U1 draws
It is additionally provided with the resistance R5 of a ground connection on foot, output voltage can be adjusted by the ratio of regulation resistance R5 and resistance R9；It addition, it is electric
The voltage divide function of resistance R7 and resistance R10 can also control output voltage.Short-circuit protection circuit 70 includes resistance R8 and electric capacity C10,
The Vdd pin of identification chip U2 connects the V+ pin of USB interface through resistance R8, and the Vdd pin of identification chip U2 is through electric capacity
C10 ground connection, resistance R8 is connected end also by electric capacity C7a ground connection, can play short circuit by resistance R8 with the V+ pin of USB interface
Defencive function, prevents circuit short circuit for a long time from fault occur.
It addition, a kind of intelligence transformation USB quick-charging circuit of the present embodiment, also include power supply indicator circuit 80, electricity
Source indicator light circuit 80 includes resistance R19, Zener diode Z1 and light emitting diode Led, Zener diode Z1 and light-emitting diodes
After pipe Led parallel connection, one end connects the V+ pin of USB interface, other end ground connection through resistance R19, uses power supply indicator circuit
80 make USB quick-charging circuit have charging display effect.Above-mentioned power supply indicator circuit 80 is spare part, it is possible to save
Slightly.In this charging circuit, voltage conversion chip U1, inductance L1 and diode D1 are heater element, in voltage conversion chip U1
Inside is provided with temperature protection circuit for detecting, makes charging circuit have superheat protecting function；Vin end and Gnd end at power supply also set
There is surge absorber S1, make charging circuit have anti-surge protection function.
A kind of intelligence transformation USB quick-charging circuit of the present utility model, distinguishes electronic product by charging identification circuit
Required charging voltage, power-switching circuit exports corresponding charging according to the charging voltage signal that charging identification circuit distinguishes
Voltage, it is achieved different electronic products are carried out quick charge；Meanwhile, this charging circuit has overvoltage, overcurrent, overtemperature protection
And short-circuit protection function, safe and reliable, also there is good anti-electromagnetic interference capability, good operating stability
Below being schematically described this utility model and embodiment thereof, this description does not has restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area
Those of ordinary skill enlightened by it, creating in the case of objective without departing from this utility model, without creatively designing
The frame mode similar to this technical scheme and embodiment, all should belong to protection domain of the present utility model.
Claims (10)
1. an intelligent transformation USB quick-charging circuit, including USB interface, charging identification circuit and power-switching circuit, described
Charging identification circuit connect the D+ pin of USB interface and D-pin, the charging voltage signal in identifying electronic product, institute
The power-switching circuit stated is connected by switching logic with charging identification circuit, for according to charging identification circuit identification
Charging voltage signal provides corresponding charging output voltage, it is characterised in that: also include EMC circuit, input filter circuit and defeated
Going out filter circuit, described input filter circuit is connected with the power input of power-switching circuit, described EMC circuit and defeated
Go out filter circuit to be connected with the power output end of power-switching circuit respectively.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 1, it is characterised in that: described power supply turns
Change circuit and include voltage conversion chip U1, frequency compensated circuit, excess voltage protection and circuit overcurrent protection, described electricity
The model of pressure conversion chip U1 is ACT4533C, and described frequency compensated circuit connects with the Comp pin of voltage conversion chip U1
Connecing, described excess voltage protection is connected with the OVP pin of voltage conversion chip U1, described circuit overcurrent protection and electricity
The Iset pin of pressure conversion chip U1 connects.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 2, it is characterised in that: described charging is known
Other circuit includes that identification chip U2, short-circuit protection circuit and bleeder circuit, the model of described identification chip U2 are FP6601-
S6B, described short-circuit protection circuit is connected with the Vdd pin of identification chip U2, the D+ pin of described identification chip U2 and D-
Pin is connected with D+ pin and the D-pin of USB interface respectively, sens1 and the sens2 pin of described identification chip U2 is respectively
The FB pin of voltage conversion chip U1 is connected by bleeder circuit.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 3, it is characterised in that: described EMC circuit
Diode D1 in parallel with a diode D1, described after connecting including electric capacity C6 and resistance R6, described electric capacity C6 and resistance R6
Negative pole connect the SW pin of voltage conversion chip U1, diode D1 plus earth；The SW of described voltage conversion chip U1
It is connected also by an a resistance R21 and electric capacity C5 between pin and the HSB pin of voltage conversion chip U1.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 4, it is characterised in that: described input filter
Wave circuit includes electric capacity C0, electric capacity C1 and electric capacity C2, after described electric capacity C0, electric capacity C1 and electric capacity C2 parallel connection, and one end and voltage
The Vin pin of conversion chip U1 connects, and other end ground connection, the Vin pin of described voltage conversion chip U1 sequentially passes through one or two
A pole pipe D0 and inductance L0 connects the Vin end of power supply；Described output filter circuit includes electric capacity C7, electric capacity C8 and electric capacity C11,
After described electric capacity C7, electric capacity C8 and electric capacity C11 parallel connection, one end connects the SW pin of voltage conversion chip U1 through an inductance L1
With the FB pin through resistance R9 connection voltage conversion chip U1, other end ground connection, described inductance L1 meets the V+ of USB interface
Pin.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 5, it is characterised in that: described frequency is mended
Repay circuit and include resistance R2, electric capacity C3 and electric capacity C4, in parallel with electric capacity C4 after described resistance R2 and electric capacity C3 series connection, described
One end of electric capacity C4 connects the Comp pin of voltage conversion chip U1, other end ground connection.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 6, it is characterised in that: described overvoltage
Protection circuit includes resistance R3 and resistance R4, and the OVP pin of described voltage conversion chip U1 is through resistance R3 and USB interface
V+ pin connects, and the OVP pin of voltage conversion chip U1 is through resistance R4 ground connection；Described circuit overcurrent protection includes an electricity
The Iset pin of one termination voltage conversion chip U1 of resistance R1, this resistance R1, other end ground connection.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 7, it is characterised in that: described dividing potential drop electricity
After road includes resistance R7, resistance R10 and resistance R11, described resistance R7 and resistance R10 parallel connection, one end connects identification chip U2
Sens1 pin, the other end connect voltage conversion chip U1 FB pin；One end of described resistance R11 connects identification chip
The sens2 pin of U2, the other end connects the FB pin of voltage conversion chip U1.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 8, it is characterised in that: described short circuit guarantor
Protection circuit includes resistance R8 and electric capacity C10, and the Vdd pin of described identification chip U2 connects the V+ of USB interface through resistance R8
Pin, the Vdd pin of identification chip U2 is through electric capacity C10 ground connection.
A kind of intelligence transformation USB quick-charging circuit the most according to claim 9, it is characterised in that: also include that power supply refers to
Indication lamp circuit, described power supply indicator circuit includes resistance R19, Zener diode Z1 and light emitting diode Led, and described is steady
After pressure diode Z1 and light emitting diode Led parallel connection, one end connects the V+ pin of USB interface through resistance R19, another termination
Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620701073.8U CN205846782U (en) | 2016-07-04 | 2016-07-04 | A kind of intelligence transformation USB quick-charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620701073.8U CN205846782U (en) | 2016-07-04 | 2016-07-04 | A kind of intelligence transformation USB quick-charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205846782U true CN205846782U (en) | 2016-12-28 |
Family
ID=58149936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620701073.8U Active CN205846782U (en) | 2016-07-04 | 2016-07-04 | A kind of intelligence transformation USB quick-charging circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521162A (en) * | 2018-06-15 | 2018-09-11 | 深圳市瑞晶实业有限公司 | A kind of quick-charging circuit |
| CN109814653A (en) * | 2019-02-13 | 2019-05-28 | 烟台艾睿光电科技有限公司 | A kind of high bias voltage power supply system |
| CN110875607A (en) * | 2018-08-29 | 2020-03-10 | 合肥捷达微电子有限公司 | Charging system |
-
2016
- 2016-07-04 CN CN201620701073.8U patent/CN205846782U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521162A (en) * | 2018-06-15 | 2018-09-11 | 深圳市瑞晶实业有限公司 | A kind of quick-charging circuit |
| CN108521162B (en) * | 2018-06-15 | 2024-03-01 | 深圳市瑞晶实业有限公司 | Quick charging circuit |
| CN110875607A (en) * | 2018-08-29 | 2020-03-10 | 合肥捷达微电子有限公司 | Charging system |
| CN109814653A (en) * | 2019-02-13 | 2019-05-28 | 烟台艾睿光电科技有限公司 | A kind of high bias voltage power supply system |
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