Oppo vooc fast charging circuit and protocol

OPPO VOOC Fast charging circuit and Protocol

1.“ Charge 5 Minute call 2 Hours ”
“ Charge 5 Minute call 2 Hours ”—— Hear this advertisement , You must already know whose mobile advertising it is . you 're right ,“ Charge 5 Minute call 2 Hours ” Refer to OPPO Mobile phone VOOC Flash charging technology .
VOOC Flash charge yes OPPO Independent research and development of fast charging technology , And apply 18 Item patent , The fastest charging speed is increased 4 More than times , And there is an impeccable intelligent full-end five-level protection , It is a faster and safer mobile phone charging technology in the world .
VOOC Flash charge in OPPO Find 7 Take the lead in using . As an adoption 3000 Milliampere battery OPPO Find 7, use VOOC Flash charging , Charge 5 Minutes to call 2 Hours ,30 The mobile phone can be charged directly to 75%—— This kind of electricity is enough for most people to use all day .（ This data is based on laboratory testing in a specific environment . The actual charging effect may vary due to factors such as battery capacity and temperature , The actual talk time varies with the use status and environment of the mobile phone .）
VOOC Flash charging requires a customized adapter and battery .OPPO Customized special adapters 、 The battery 、 cable 、 circuit 、 Interface , And add MCU Smart chip ; That's what makes VOOC The adapter used for flash charging has become the first smart charger that can be upgraded . On this basis ,OPPO Deep research and development of intelligent full end five level protection technology , Safety is impeccable .

2. You know, VOOC How difficult is the hardware circuit (jiandan) Is it easy ？

The following is what the author learned OPPO Of VOOC Fast charging mobile phone motherboard side circuit . The system block diagram and circuit are as follows ：

System diagram ：

Schematic diagram of mobile terminal ：

Circuit contains 2 part ：

（1） Back to back MOS tube .
The key point of this circuit is 2 Back to back NMOS, You can see USB_VCHR It's the charger output , It can be understood as the charging interface on the mobile phone .VBAT0 It's the battery end , namely VOOC The charger output passes USB Line —> Mobile phone charging interface —>MOS+MOS—> The battery , The efficiency that can be achieved in this way is unparalleled !!!
This is the circuit of older models in previous years , The latest circuit has changed , The point is two MOS The connection relationship of tubes has changed . I'm lazy and don't want to draw a frame , In addition, this information does not want to be published online , If you want to know, you can follow my official account , Send me a private message .

（2） MCU control
The first time I used it was ST Of STM8S003F3 Single chip microcomputer , In recent years, there have been domestic Rockchip Materials can replace .

The hardware circuit is so simple ！ The hardware circuit is so simple ！ The hardware circuit is so simple ！

Software protocol —— Some of the following protocols come from the network ！！！！！

(1) Fast charging start process

(2) Fast charging communication protocol process

(3) Interface pin definition

(4) Protocol analysis

(5) Fast charging communication process

(6) Security mechanism

Welcome to follow individual public number , Some problems and knowledge points encountered in the later work will be summarized and sent to official account , Make a record . I have schematic diagrams of several mobile phone customers , And all aspects of program design , Welcome to exchange .