PMP21488: PMP21488: 3.3vdc to 12vdc

Rajeev Kumar81

Prodigy 20 points

Part Number: PMP21488
Other Parts Discussed in Thread: PMP20541, PMP20196, LM5022

Can I increase 3.3vdc to 12vdc output in this board?

over 5 years ago

0 Ryan Manack over 5 years ago

TI__Intellectual 2610 points

Hello, unfortunately you cannot change the output voltage. The transformer cannot handle 48W. Take a look at PMP20541. This design has a 12V/4A output.
Thanks,
Ryan

0 Rajeev Kumar81 over 5 years ago in reply to Ryan Manack

Prodigy 20 points

Good afternoon Mr. Ryan,
Basically our requirement is:
Input Voltage: 8 to 100Vdc
Output Voltage: 12Vdc
Current rating: 2Amp.
Kindly suggest some of the design.
Thanks
Rajeev

0 Ryan Manack over 5 years ago in reply to Rajeev Kumar81

TI__Intellectual 2610 points

Hi Rajeev,

Take a look at PMP20196 as a starting point. It is 9-150Vin and 5V/4A output. You can try to take the output up to 12V/2A max by reducing R13. The duty cycle will increase to the low 80% range, which is okay because the LM5022 can handle up to 90%. It would be best to lower the turns ratio to ~2.5:1 to fully optimize the design.

Please use Texas Instrument's Power Stage Designer to calculate the differences between PMP20196 and your design. It is free and easy http://www.ti.com/tool/POWERSTAGE-DESIGNER

Ryan

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PMP21488: PMP21488: 3.3vdc to 12vdc