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BQ24725A start up problem

Jedrzej Topilko
Prodigy 10 points
Other Parts Discussed in Thread: BQ24725A

Hi,

I have problem with BQ24725A. After connecting power supply Q11 and Q12 aren't opening. I measure voltage on ACDRV and it is 0V. Voltage on ACOK is 0.9V, but if I reduce supply to 15V it drops to 0V. Wher can be a problem?

PS; Sorry for my english.