tps92314 uvlo settings

sheetal verma1

Intellectual 600 points

Other Parts Discussed in Thread: TPS92314

how to achieve desired uvlo settings in TPS92314

over 11 years ago

0 Victor Chen_HK over 11 years ago

TI__Expert 5130 points

Hello,

The turn on threshold of VCC UVLO is about 26V@25C and turn off threshold is about 13V@25C. There will be minor changes in these value due to temperature and process. Please refer to data sheet pg.3, 5 and 9 for details.

Regards,

Victor

0 sheetal verma1 over 11 years ago in reply to Victor Chen_HK

Intellectual 600 points

Hi Victor

Thanks...

we have got UVLO at 60V AC to 80V AC Input & but we need the UVLO at 120V-150V AC INPUT FOR 39W application( o/p is 60v 650ma ).

What should we do for that.

0 Victor Chen_HK over 11 years ago in reply to sheetal verma1

TI__Expert 5130 points

Hello,

Could you attach your schematic? I think the value of the resistors connected to VCC and the AUX winding have something to do with your UVLO.

Regards,

Victor

0 sheetal verma1 over 11 years ago in reply to Victor Chen_HK

Intellectual 600 points

In attached design for 39w, the board is turning on at 150v ac.

But when voltage is reduced at a range of 60v-80v ac it is turning off.

Now we want the board to turn off below 150v ac

0 Victor Chen_HK over 11 years ago in reply to sheetal verma1

TI__Expert 5130 points

If you set the turn ON and OFF at same level, the power supply will turn on and off at threshold voltage. We won’t do that in designing an AC/DC power supple generally.

Is there any reason you need to do so?

Regards,

Victor

Power management

Power management forum

tps92314 uvlo settings