LP8866-Q1: OVPL alarm after power up

Ryan Wang

Part Number: LP8866-Q1

Tool/software:

Zhiqian,

Customer LP8866 is already in mass production. But randomly many LP8866 report BSTOVPL alarm with INT pull low.

You can see from below capture. VIN is up before VDD. Around 7s after boost is up, INT is pull low. And BL voltage and FB voltage is very stable at that time.

Do you know why OVPL is reported when boost and FB voltage is very stable?

Thanks

1 month ago

0 Zhiqian Wu 1 month ago

TI__Mastermind 19730 points

Hi, Ryan

If customer doesn't change the setting, OVPL will not reflect in INT pin. Could you pls share the register value of below three address.

0 Ryan Wang 22 days ago in reply to Zhiqian Wu

TI__Expert 5880 points

Zhiqian,

Customer just verified:

0xE register return 0x0；0X10 register return 0x2；0x12 register return 0x0

0 Monet Xu 21 days ago in reply to Ryan Wang

TI__Expert 7655 points

Hi Ryan,

Zhiqian will reply once he is back to the office.

Monet Xu

0 Zhiqian Wu 17 days ago in reply to Monet Xu

TI__Mastermind 19730 points

Hi, Ryan

Pls kindly share the register for below address, normally OVPL will not trigger the INT pin.

0 Zhiqian Wu 17 days ago in reply to Zhiqian Wu

TI__Mastermind 19730 points

Hi, Ryan

Also, pls kindly share the schematic here together.

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LP8866-Q1: OVPL alarm after power up