TPS563219A: POL behavior when feedback resistor short or open

Jan Bob

Intellectual 280 points

Part Number: TPS563219A

Dear Team,

What TPS563219A will happen when high side feedback resistor cracked(open) or low side feedback resistor short?

We want to know these four situation

1. high side R crack before power on

2. high side R crack after power on

3. low side R short before power on

4. low side R short after power on

over 7 years ago

0 Jason Wang (BSR-MV) over 7 years ago

TI__Genius 9550 points

hi Bob,
We are planning to do the test, then give you answer.

0 Shawn Nie over 7 years ago

TI__Genius 10070 points

Hi,

Please see my input:

1. high side R crack before power on
The system is open loop, the output voltage would increase during startup, and then enter hiccup mode because UVP.

2. high side R crack after power on
The circuit work normally, and then enter hiccup mode.

3 and 4 are the same with 1 and 2.

Shawn

Power management

Power management forum

TPS563219A: POL behavior when feedback resistor short or open