BQ77915: High-Side switching using BQ776200

sourav kc

Prodigy 70 points

Part Number: BQ77915
Other Parts Discussed in Thread: BQ76200, BQ76922, BQ77307

Tool/software:

Can you suggest how to convert low-side switching of bq77915 to high-side switching using bq76200.

1 month ago

0 sourav kc 1 month ago

Prodigy 70 points

I am waiting for your reply.

I am attaching my design here. Basically I have Stacked EVM boards of bq77915 and bq76200. The thick lines are the connections in stack. Kindly verify this design and give me suggestions.

6735.BQ77917_with_BQ76200.pdf

+1 Luis H. S. 1 month ago in reply to sourav kc

TI__Mastermind 35060 points

Hello Sourav,

I responded in your other post.

I do not think this configuration would work as there is both a high-side and low-side in the system.

I believe a better device here would be the BQ77307 with an MCU. You could control the FETs manually through the MCU. Alternatively there is the BQ76922, which has integrated high-side FETs and has cell monitoring.

Best Regards,

Luis Hernandez Salomon

0 sourav kc 1 month ago in reply to Luis H. S.

Prodigy 70 points

I am sharing my design in detail. Please verify once again.

5040.bms.pdf

0 Luis H. S. 1 month ago in reply to sourav kc

TI__Mastermind 35060 points

Hello Sourav,

This may not work, because the load-detect recovery feature was made with low-side in mind, this is why I shared the E2E post in the other thread, as it may give a way to make it work.

Best Regards,

Luis Hernandez Salomon

Power management

Power management forum

BQ77915: High-Side switching using BQ776200