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TI Home » TI E2E Community » Support Forums » Power Management » LED Drivers/LCD Bias » LED Drivers/LCD Bias Forum » TPS61040
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TPS61040

This question is answered
Umameheswara Rao Maddula
Posted by Umameheswara Rao Maddula
on Jul 13 2012 04:45 AM
Prodigy30 points

I am using 5inches tft lcd.For back light i required 20v,40mA supply.So iam planning to use tps61040 power ic using PWM based configuration.I want to change R2 resistor from 60 ohm to 30 ohm.

 

Please give me suggestion whether it will work or not.

 

Regards

Uma

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  • Chris Glaser
    Posted by Chris Glaser
    on Jul 13 2012 08:05 AM
    Guru60725 points

    The amount of output power you can provide depends on the input voltage.  At higher input voltages, the TPS61040 can provide that much output power.  Go through the equations in the datasheet to make sure it will work for your application.

    TPS61040
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  • Umameheswara Rao Maddula
    Posted by Umameheswara Rao Maddula
    on Jul 14 2012 00:03 AM
    Prodigy30 points

    Thanks chris.

     

    I am giving input supply is 5V/1A.

     

    Regards

    Uma

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  • Chris Glaser
    Posted by Chris Glaser
    on Jul 16 2012 07:55 AM
    Verified Answer
    Verified by Chris Glaser
    Guru60725 points

    This should be a sufficiently high voltage for your output power needs.

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