BQ20Z655-R1: Frequency of charge pump which drives DSG & CHG pins

kevin paterson69

Prodigy 80 points

Part Number: BQ20Z655-R1

hi,

What is the frequency of the charge pump which drives DSG & CHG pins?

device in question: BQ20Z655-R1

over 5 years ago

0 bdefar over 5 years ago

TI__Prodigy 680 points

Hi Kevin,
what are you using the charge pump frequency for?

0 kevin paterson69 over 5 years ago in reply to bdefar

Prodigy 80 points

nothing obscure.

we have a noise issue on one of our products which is inadvertently activating the discharge FET.

We are trying to eliminate the sources of noise observed on the gate drive.

The majority of noise we know is external to the battery but there is an inverted sawtooth observed on the gate drive and i just wanted to confirm the frequency so i can confirm that this waveform is from the charge pump.

0 Batt over 5 years ago in reply to kevin paterson69

TI__Mastermind 42535 points

Kevin,

Sorry we don't disclose this. But, if you post your screenshot, we can confirm if it's not the charge pump.

Power management

Power management forum

BQ20Z655-R1: Frequency of charge pump which drives DSG & CHG pins