BQ25770G: Selecting a Battery Charged with greater than 28V Vin

Aria10

Part Number: BQ25770G
Other Parts Discussed in Thread: BQ25751, , BQ25750, TPS26750

Tool/software:

Seems like both BQ25770G and BQ25751 have power path controls, how do I select between the two. Is BQ25751 only dedicated to Lead Acid?

What battery charger is recommended if I need the following

Vin > 28V for connecting with EPR sources (140W ~ 28V/5A is fine)
Power path for Vsys
Lithium Ion battery support
I2C host control

7 months ago

0 Tiger Zhou 7 months ago

TI__Mastermind 33275 points

Hi, Aria,

BQ25770G only supports up to 23V battery. Yes, BQ25751 is optimized for lead acid batteries. You may consider BQ25750 buck-boost charger.

https://www.ti.com/product/BQ25750

Regards,

Tiger

0 Aria10 7 months ago in reply to Tiger Zhou

Prodigy 130 points

Ok. My battery voltage would be 4S so around 12V-14V. I am mostly concerned about a buck boost charger that can handle the EPR voltage coming from the PD controller.

So BQ25750 is a good option then to use with the TPS26750 ?

Are there any known issues with the BQ25750? I thought the BQ25751 was like an upgrade for it-is that not so?

0 Tiger Zhou 7 months ago in reply to Aria10

TI__Mastermind 33275 points

BQ25750 supports EPR, works with TPS26750 for PD solutions. Same performance as BQ25751.

0 Aria10 7 months ago in reply to Tiger Zhou

Prodigy 130 points

appreciate it. thank you I will purchase EVM for both

Power management

Power management forum

BQ25770G: Selecting a Battery Charged with greater than 28V Vin