BQ28Z610-R1: Diode for pin PACK (demo board)

Charles-Elie Demarty

Part Number: BQ28Z610-R1

Hello,

In your design of the demo board, you have populed a diode (D1) between PACK+ of the board and PACK of the BQ (pin 8).

Can you explain its usefulness to me? Because it not recommended in the datasheet.

Thanks in advance.

Charles-Elie

0 Wyatt Keller over 3 years ago

Hello Charles-Elie,

The main purpose of this is for reverse connection protection. It is not a requirement of the design.

Sincerely,

Wyatt Keller

0 Charles-Elie Demarty over 3 years ago in reply to Wyatt Keller

Hello Wyatt,

Ok.
So, without this diode: it's possible to have a short-circuit through the BQ? (From VSS to PACK pins?)

+1 Wyatt Keller over 3 years ago in reply to Charles-Elie Demarty

Hello Charles-Elie,

There should never be reverse current through the BQ, but we often add extra external protection to our designs, especially for EVMs.

Sincerely,

Wyatt Keller

Power management forum