TPS62865: TPS62865 application question

Dane Zhang

Part Number: TPS62865

Hi team,

our customer is now using TPS62865 and they want to know the VSET/MODE pin's logic:

In fixed output voltage applications, connect a resistor between this pin and GND to set the output voltage (see table 8-2). After start-up, connect this pin to a high level to enable forced-PWM operation, or to a low level to enable power-save mode.

as stated in datasheet, the MODE pin should connect to high/low level without a resistor? and if that's the rule, then what the t-startup it is? we didn't see the detail in datasheet.

over 3 years ago

0 Dingmin Xu over 3 years ago

Intellectual 490 points

Hi,

Please see the 8.4.3 Voltage Setting and Mode Selection (VSET/MODE) part in the datasheet.

and

Thanks!

0 Chris Glaser over 3 years ago

TI__Guru*** 145470 points

Thank you Dingmin for your reply!

Hi Dane, are you asking what is tstartup when VSET/MODE is tied high/low? Is that your question?

Tramp is always the same. It is the tdelay that might change based on the VSET/MODE pin connection.

Thanks,

Chris

0 Dane Zhang over 3 years ago in reply to Chris Glaser

TI__Expert 4635 points

Hi Chris,

thanks for replying,

my question is that should the VSET/MODE pin connect to high/low level without resistor? or just need a high/low level

0 Chris Glaser over 3 years ago in reply to Dane Zhang

TI__Guru*** 145470 points

Hi Dane,

The important thing is that the pin be driven to a logic high (above 0.84V) or logic low (below 0.4V) level. There can be a resistor on the pin in addition, but it is not required. The resistor would just consume extra current when the pin is high.

Chris

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TPS62865: TPS62865 application question