Power Sources and Supplies: World Class Designs

The target capacitance is:

X

C

C









33

40

83

1

2 200 8 3

mV

.A

m

kHz m

96 F

.

.







Once again, we see that the fi lter capacitor is quite small, even for a very large output

current.

We will need an auxiliary supply for this design. The output of the IC supply will have no

relationship to the output voltage. The best we can do is to design a circuit that is close

to the required voltage and regulate it to the required voltage. The combination of the IC

current and the switch current is only 15 mA. We can design the supply to deliver 12 V

and use a zener diode to ensure that the voltage does not rise above the 16 V maximum of

the IC. The winding will ...