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Power inputs for PTH08T210W

Harshad Chirutkar
Prodigy 180 points

Sir thanks for clarifying my previous questions, the Technical support from India by e-mail is not responding me quickly!!

Can i input 12V , 1A to PTH08T210W to get 1V , 30A output. i.e.

Can I input 12V, 1A from simple LM317 and give it to PTH08T210W to get 1V, 30A output?

If not suggest me how to input violtage to PTH08T210W. or what can be the input power to PTH08T210W??

I am confused because i am thinking how do such a small module can handle 30A current with low input power!!

Please clarify and help me I will be grateful to you !!

  • 0
    TI__Mastermind 38230 points

    The input power  with 12Vin and 1A from the power source is = to 12W (12V x1A).

    The 30A at 1V = 30W output power  is (1V x30A)

    In order to derive  30W output  power from any power supply, the input power must be greater than the output power . The must formula (Power=Voltage x Current ) .

    The efficiency of the power supply  is directly a function of ( power dissipation within the power supply) . There are always transfer power losses in any power line/ system. It can never be 100% or greater efficiency

    Efficiency   = Power out/ power In  .     PTH08T210W published efficiency is 80% for 1V at 30A identified in the  data sheet. The efficiency of the 1Vout= 80%. 

    The power out put =30W (1Vx30A).     Input power = 12V x unknown Amps ( current )  input current= Power out(30w/Vin(12V x 0.8(80% efficiency)=3.125A input current .

    The input current required to have a 30W( 1V x30A) output power = 3.125Amps