BQ756506-Q1: NFAULT pin is always Low

Viet Nguyen

Part Number: BQ756506-Q1

Tool/software:

I'm facing an issue where NFAULT pin is always Low even when NFAULT_EN bit in DEV_CONF register is cleared.

Does anyone have a clue for me?

RB,

Viet

0 Alex ji 7 months ago

Hi Viet,

NFAULT pin should be pulled up to CVDD with a pullup resistor. Please read back 0x0002/DEV_CONF to double check if NFAULT_EN=0. Thanks.

Alex Ji

0 Viet Nguyen 7 months ago in reply to Alex ji

Thank you for the answer. Got it.

nFAULT is pulled up via J2 ->> I forgot this
Power down: nFault = 4.44V
Wake up: nFault = 0.01V
Read 0x0002/DEV_CONF = 0x54

Send 0x0002/DEV_CONF = 0x00
nFault = 4.95V ->> correct

BR,

Viet

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