TPS65251 REN_DIS

Keiichi Kajino

Expert 2365 points

Other Parts Discussed in Thread: TPS65251

Hi, folks

Could you explain what does the "REN_DIS" mean?

It describes as "Enable discharge resistor" in spec sheet, but it have a pullup current souce as ICH_EN.

I am confusing. The EN pin have both pulldown register and pull-up current source?

over 9 years ago

0 Don Schelle over 8 years ago

TI__Expert 4150 points

Hello,

I'd like an answer to this question as well as what the "Discharge time enable pins" means. I'm seeing 10ms pulses being outputted from the TPS65251 enable pins.

Don

0 William Cooper over 8 years ago in reply to Don Schelle

TI__Intellectual 2985 points

Hi Don,

I am sorry for the delayed response here. I think the experts covering this part are more closely monitoring a different forum. I will loop them in and make sure we get you some help.

Regards,

Will

0 Jason Wang (BSR-MV) over 8 years ago

TI__Genius 9550 points

Hell,

the pull down resistor active only 10ms when power up, then disable this function.

In some case, ENs connect to capacitor to implement power on sequencing. when the input power on-off-on very quickly, the capacitor have residual voltage if there is no this function. The sequencing will be wrong under this application. So this device add this 10ms discharge function.

Jason Wang

Power management

Power management forum

TPS65251 REN_DIS