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PTH08t240W - Inductor Temperature

PeterF
Prodigy 70 points
Other Parts Discussed in Thread: PTH08T240W

Hello!

Wich is the most likely fault if the inductor on a pth08t240w runs hot with no load or at a static 100mA load?

The input and output capacitor are:

Panasonic, part number EEUFR1C471

Capacitance: 470µF

Ripple Current: 950 mA

Impedance: 0,056 Ohm

The input and output Voltage was measured as stable, verything connected as shown above.

The PTH08t240W draws about 200mA idle current.

Is that due to the bigger capacitance?

Thank you and have a nice day! :)

Greetings,

Peter

  • 0
    TI__Mastermind 38230 points

    PTH08T240W inductor temperature with 5V output voltage output load 01A to 2 amps is about 70-73°C when soldered into a 100mm x100 mm double side PCB with 2 ounce copper.

    The  inductor at 6 amps(5Vout) load same PCB soldering temperature is about 80-83°C.

    The PCB solder connection is required for best thermal performance .

    The application above  input and output capacitors do not affect the thermal  performance.

    Tom

  • 0 in reply to Tom Guerin
    Prodigy 70 points

    Tom Guerin said:

    PTH08T240W inductor temperature with 5V output voltage output load 01A to 2 amps is about 70-73°C when soldered into a 100mm x100 mm double side PCB with 2 ounce copper.


    Thank you for your Reply!


    Greetings,

    Peter