=> Co = [ (6×50µs)]/(8×50mA) = 7.5×10-4 = 750µF. 14. Calculate the efficiency of the step down switching regulator given the input voltage Vin= 13.5v and output voltage =6v. Assume the saturating Voltage Vs=1.1v and the forward voltage drop Vd = 1.257v
A. η = 75%
B. η = 48.5%
C. η = 63.9%
D. η = 80.5%
Answer:A
=> Co = [ (6×50µs)]/(8×50mA) = 7.5×10-4 = 750µF. 14. Calculate the efficiency of the step down switching regulator given the input voltage Vin= 13.5v and output voltage =6v. Assume the saturating Voltage Vs=1.1v and the forward voltage drop Vd = 1.257v
A. η = 75% B. η = 48.5% C. η = 63.9% D. η = 80.5%
Explanation: Efficiency of the step down switching regulator, η = {[(Vin-Vs+Vd)]/ [Vin]}×(Vo) / [(Vo+Vd)] = {[(13.5v-1.1v+1.257v)/13.5v]} ×[(6/(6 ×1.257)]