BQ76PL455A-Q1: Power supply of the device

Nicolás González

Part Number: BQ76PL455A-Q1
Other Parts Discussed in Thread: TMS570LS0714, BQ76PL455A

Hello,

I am trying to design a prototype of battery management system using this device BQ79PL455A-Q1 for the monitoring, and also the microcontroller TMS570LS0714 for the data management. The thing is that I have a bit doubt about the power supply of the devices; if I have understood correctly, pins VDIG and VIO from BQ79PL455A-Q1 are fed from the TOP pin through a NPN transistor. However, I would like to know if I can also use those two pins for the microcontroller supply (its pins are VCC and VCCIO) in a direct connection.

Thank you so much!!

over 4 years ago

+1 Taylor Vogt over 4 years ago

TI__Genius 17370 points

Hi user,

It is not a good idea to try and supply the MCU with the bq76pl455a because you will not be able to use the supply when the bq76pl455a is in shutdown mode and you cannot send a wakeup ping because it the MCU will be off until it comes up. Please use a separate supply, 12V battery or LDO from the pack connection for this.

Regards,

Taylor

0 Nicolás González over 4 years ago in reply to Taylor Vogt

Prodigy 110 points

Thank you so much for your reply. I will consider that solution.
Regards!

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BQ76PL455A-Q1: Power supply of the device