BQ76905: Body diode protection during Sleep mode

Pranav M

Part Number: BQ76905

Tool/software:

Could you please clarify the behavior of body diode protection in the following scenario?

The host MCU disconnects the charge MOSFET due to an overvoltage condition.
The device subsequently enters sleep mode because of low current draw.
A discharge current exceeding the body diode threshold is then applied.

In this case, will the body diode protection mechanism cause the charge MOSFET to reconnect during sleep mode due to the reverse (discharge) current?

TIA

2 months ago

0 Alexis_H 2 months ago

TI__Genius 17705 points

Hello Pranav,

It may be possible for the body diode protection to still activate during sleep mode. I will need to verify this behavior on bench. Have you seen this behavior yourself?

Best Regards,
Alexis

0 Pranav M 2 months ago in reply to Alexis_H

Prodigy 95 points

Yes, I have observed this behavior in my testing.

0 Alexis_H 2 months ago in reply to Pranav M

TI__Genius 17705 points

Hello Pranav,

Do you mind sharing what configuration settings you have and the exact values of your procedure?

Best Regards,
Alexis

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BQ76905: Body diode protection during Sleep mode