Voltage Converter TL497A

TL497A Voltage Converter

This voltage converter is built with TL497A and converts an input voltage of 5…12 voltage to a higher level of 15…30 volts. This is specially helpful in mobile applications where power supply levels are commonly limited to 12 volts supplied by batteries.

The voltage converter circuit uses the TL497A as a flyback-voltage converter. The choke coil is 40uH/2A. Capacitors C2 annd C1 suppress voltage spikes. The maximum output current depends on the difference between the input and the output voltages and is around 100mA. The ripple voltage is relatively low. The standby current is around 8mA and the efficiency is about 70%.

TL497A voltage converter circuit diagram

Voltage Converter TL497A


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  • paulo


    I was trying to use your voltage regulator and it’s making a lot of noise in my circuit, is it normal? How can I handle it?

    Thank you in advance,

  • paulo

    Are the values of the capacitors C1 and C3 correct? It seems like they’re missing the units.


    • savita

      hi in which frequency does the circuit work?
      choke coil 40uH ,2A, FREQUENCY=??

    • Popescu Marian

      When the unit is missing it means that the value of the capacitor is in microFarads µF or there is a mistake 🙂 but in this case C1 = 0.56 µF = 560 nF and C3 = 0.1 µF = 100 nF