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BQ40Z80: bq40z80 communicate failed issue

Part Number: BQ40Z80

Dear team,

My customer are using bq40z80, and they found the communication sometimes failed when startup and they think the power sequence will influence the communication. I wonder if their schematic is OK. So could you kindly review the schematic and give some suggestion? They used 2 bq40z80 for 6S2P battery.

Thanks.

Best regards,

Sammi6S2P-6600mAh.pdf