UC2842: Design Calculation

SATHISHKUMAR vishwanatha

Intellectual 495 points

Part Number: UC2842

Hi,

How to take the s(f) value in the design calculation.

Regards,

Sathish.

over 6 years ago

0 Peter Meaney over 6 years ago

TI__Mastermind 31580 points

The s(f) is another way of writing jw(omega) where omega is 2*PI*frequency (f)

Regards

Peter

0 SATHISHKUMAR vishwanatha over 6 years ago in reply to Peter Meaney

Intellectual 495 points

Hi Peter,

In our design switching frequency is 100Khz can you tell me what is the jw(omega) value.

Regards,

Sathish.

0 Peter Meaney over 6 years ago in reply to SATHISHKUMAR vishwanatha

TI__Mastermind 31580 points

Hi Sathish,

The jw(omega) value varieas as the frequency sweeps from low to high.

The impedance of the a capacitor is 1 / (2*PI*f*C) . The impedance has two components real and imaginary components which describes the phase shift between the voltage and current through the capacitor.

1 / (2*PI*f*C) can be rewritten and 1 / (jw*f*C) where w = 2*PI

Have a search for capacitor complex impedance on the web and you will find plenty of examples.

Regards

Peter

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UC2842: Design Calculation