BQ33100EVM-001: CHGFET not fully turn on cause P-MOSFET overheat

JeffYC Yang

Part Number: BQ33100EVM-001

Hi sir,

I have meet an issue about during charging, when during charging and super-cap voltage about ~ 0V , CHGFET we always measurement this point about 2.5V, cause P-MOSFET not fully turn on and overheat.

it possible to let this pin close to 0V when charging?

Thanks!

Jeff

over 8 years ago

0 JeffYC Yang over 8 years ago

Expert 1290 points

Hi sir,

I also attached schematic for review. And another que4130.EPM-1714_A1 _ 06_SCap Manager (.pdfstion, is there any SW setting impact CHG pin voltage?

0 JeffYC Yang over 8 years ago in reply to JeffYC Yang

Expert 1290 points

I also attached schematic for review. And another question, is there any SW setting impact CHG pin voltage?

5504.EPM-1714_A1 _ 06_SCap Manager (.pdf

Power management

Power management forum

BQ33100EVM-001: CHGFET not fully turn on cause P-MOSFET overheat