SC8701 buck-boost adjustable DC-DC verification

SC8701 is a control chip with step-up and step-down functions. With good peripheral components and good PCB layout, it can control currents exceeding 10A. Very powerful! !

It also supports PWM adjustment of voltage and current limit value, and various functions are quite complete.

The voltage dividing resistor of the FB circuit can be calculated using a table to facilitate you to find the required value.

The detailed circuit explanation is written on the schematic diagram. If you have any questions, please ask (after all, I am learning while doing it, so please give me your advice)

PCBlayout is a very demanding thing. The current design of this version has too many sacrifices, and many technical requirements on wiring are not well followed.

Both PCBs are not working properly. Do not change the board to a 4-layer board and try again.

However, I seriously do not recommend that you use my PCB schematic. The schematic diagram is also subject to modification at any time. Please check it against the datasheet before use.

References

①SC8721 Application Notes: SC8721 SC8720 SC8701 Buck-Boost IC Application Guide_V1.1 (Baidu Library)

②Design of SC8701 120W DC TO DC power module (CSDN)

https://blog.csdn.net/weixin_44564149/article/details/86534882

③SC8701 Datasheet

④Application Guideline AN-1001 "Calculation Method of Driving Parameters of IGBT and MOSFET"

https://blog.csdn.net/yy123xiang/article/details/50508195

⑤ADI’s power supply master class

https://www.bilibili.com/video/BV195411V7

⑥B station UP owner: Teacher Tang talks about e-sports

https://www.bilibili.com/video/BV13V411E7DE

https://www.bilibili.com/video/BV1X541137T6

I highly recommend the teacher. His videos teach a lot of practical application knowledge.

To be continuously supplemented