BQ76952: Unable to communicate with IC for OTP programming

Manuj Agrawal1

Part Number: BQ76952

Dear TI Team,

I have been trying to program the OTP memory with just 12V applied at the BAT pin and ground being connected, but have been unable to initiate the communication with the IC. However it works, if I attach the 200 ohm cell simulation resistors between all VC pin as per the schematic in the EVM. On the programming and assembly line, for efficient and fast processing; just applying 12V at the BAT pin should be enough and there should be no need to supply voltages at VC pins through cell simulation resistors.

Please help me with a solution.

Thanks and Regards

Manuj Agrawal

over 4 years ago

0 Matt Sunna over 4 years ago

TI__Guru* 81035 points

Hi Manuj,

The device is likely shutting down if there is no voltage on the VC16 pin. The default Stack Shutdown voltage is 6000mV. Can you try applying 12V to both the BAT and VC16 pins?

Best regards,

Matt

0 Manuj Agrawal1 over 4 years ago in reply to Matt Sunna

Prodigy 175 points

Dear Matt,

Thank you so much for the advice. I applied 12V between BAT-VSS and VC16-VC0 and I could communicate with the IC and the OTP programming conditions were met, although I haven't tried modifying the OTP.

Thanks and Regards

Manuj Agrawal

Power management

Power management forum

BQ76952: Unable to communicate with IC for OTP programming