Part Number: TIDA-01627
Hello,
I'am writing to ask about TIDA-01627. Question is related to this post on the power management forum:
Description:
I have got a custom charger board based on TIDA01627. I programmed TPS665987D based on this document:
The problem is circuit is not charging connected battery. I have checked I2C signal lines, TPS is trying to communicate with BQ but it does not response. Further investigation revealed that communication process starts before CHRG_OK signal gets up. Like in TIDA, BQ's CHRG_OK pin is connected to GPIO1 pin of TPS. I assume, problem is too early start of communication process. Problem occurs both when battery is present or not. I would like to ask how do I program TPS to be triggered by CHRG_OK signal to start communication.
Best regards,
Wojciech Maćkowiak