TPS62130: Outputs Constant 1.2V , No Switching Happens

Anguraja Renganathan

Part Number: TPS62130

Tool/software:

Hi,

Recently,

During Board Rework, We removed the Resistor to GND at FB pin of regulator and powered on the board, The regulator stops working, it outputs Constant Voltage,

Later we mounted the Resistor Back, but Still it is Outputting 1.2V, No Switching Happens. Does the Regulator got Damaged???

If Regulator Got damaged, Could you explain, Why it Happened??

over 1 year ago

0 Colin Chen over 1 year ago

TI__Mastermind 21161 points

Hi Sir,

Could you post your schematic and input& output condition?

Thanks

Colin

0 Anguraja Renganathan over 1 year ago in reply to Colin Chen

Prodigy 20 points

Hi colin,

Here is my Regulator in schematic

Input is 12V, output is 5V

0 Colin Chen over 1 year ago in reply to Anguraja Renganathan

TI__Mastermind 21161 points

Hi Sir,

No switching wouldn't have output of 1.2V.

Could you test waveforms of SW and inductor current in this condition?

Thanks

Colin

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TPS62130: Outputs Constant 1.2V , No Switching Happens