A student has decided to design and build the complementary-output dc power supply of Fig. P1.90 to power a bunch of op amp circuits. The supply is to provide dc outputs of 612 V to loads of up to 100...

A student has decided to design and build the complementary-output dc power supply of Fig. P1.90 to power a bunch of op amp circuits. The supply is to provide dc outputs of 612 V to loads of up to 100 mA each, and with ripples not greater than 0.5 V. (a) Assuming the diodes have VD(on) 5 0.8 V, fi nd the required amplitude of the sine-wave across the entire secondary winding, as well as the required values of C1 and C2.

(b) Sketch and label the two supply voltages, showing the ripple and accounting also for the diode drops. (c) Find VO, iD(max), iD(avg), TON, and PIV. Hint: focus your analysis and calculations on the positive supply, as the negative supply is just symmetric of the positive one.