Ai Tomb Style No. 636 - SC8701 Automatic Boost and Buck Car Charger

Input:

     Using a DC port +-C TYPE-C input with deception function, the deception chip is FS312, which can deceive 20V3A

Output:

     Using TYPE-A + TYPE-C (conflict design) output,

Working parameters:

     The operating frequency is set to 200K and can be changed to 400K or 600K

     The dead time is set to 40ns and can be changed to 60ns or 80ns

     The output power supports configuration and can be gradually increased from 18W to 100W.

     Since there is no suitable device for the inductor here, we will use a low-power 3.3UH, so we cannot do high-power load testing for the time being.

The IIC communication pin header of SW2305 is reserved.

This module is compatible with a certain Taobao aluminum case (link back in the comment area), and the size is appropriate, no more, no less.

2022-2-15：

I found that the SCK pin needs to be grounded for the chip to work normally. Fortunately, the pin header is reserved and it is normal to just cover it with a shorting cap.

(I have not introduced IIC communication debugging at this time, so SDA SCK has been floating, causing the chip not to work)

The current test situation is that port C supports fast charging but the fast charging function of port A cannot be activated. The reason is unknown.

2022-4-26

The RT resistor must be 100K! RB calculates it by itself based on the 5V output

The picture below is the protocol test diagram of port C

Next is the 5V2A ripple test of port A.

Module display:

Still under further modification