BQ79600-Q1: Reverse Wakeup condition

Meng Liu

Part Number: BQ79600-Q1

Hi Expert

My customer want to use UART for reverse wakeup:

if VIO voltage=0V,BAT (15pin) voltage=6.5~18V, device whether can trigger reverse wakeup function that mean is INH(16pin) can output wake up signal?

over 2 years ago

0 Nancy Hidalgo over 2 years ago

TI__Expert 3760 points

Hi,

In this example, the INH pin is connected to a PMIC to enable it for reverse wakeup. When INH is not activated, this pin goes into a high-impedance mode. When activated, this pins outputs a voltage from Vbat (minus V_drop_INH). It does not send a wakeup signal. It should be used to drive the enable pin of the other device.

Hope this helps,

Nancy

0 Meng Liu over 2 years ago in reply to Nancy Hidalgo

TI__Intellectual 1765 points

Thank you.

So, is customer want to use to VIO voltage=0V, BAT (15pin) voltage=6.5~18V condition okay? we want to make sure when VIO=0V,work around can work?

0 Wayne Liu over 2 years ago

TI__Expert 8705 points

Yes, it works without VIO power supply, but it must be enabled by INH.

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BQ79600-Q1: Reverse Wakeup condition