BQ25505: State of nVB_PRI_ON and nVB_SEC_ON when device disabled

Steven Slupsky

Part Number: BQ25505

Hello,

I am unable to locate information regarding what the state of nVB_PRI_ON and nVB_SEC_ON are when nEN is high. Specifically, these situations:

1. VIN_DC = not connected. VBAT_SEC = not connected. VBAT_PRI = 3.6V. nEN = high

2. VIN_DC = not connected, VBAT_SEC > 0 (connected). VBAT_PRI = 3.6V. nEN = high

Thank you,

Steve

over 6 years ago

0 Jeff F over 6 years ago

TI__Guru**** 166436 points

Steven,

In both cases, /VB_PRI_ON will be low, which connects primary battery to system. /EN needs to be low in order for VBAT_OK, which controls /VB_PRI_ON and /VB_SEC_ON, to function.

0 Steven Slupsky over 6 years ago in reply to Jeff F

Prodigy 170 points

Thank you for the feedback. That helps my understanding.

Power management

Power management forum

BQ25505: State of nVB_PRI_ON and nVB_SEC_ON when device disabled