(b)Sketch the waveforms of the gate drive voltages G1 and G2 assuming a duty cycle of 25% and a maximum gate drive voltage of 10V. How would you prevent the two MOSFET to turn on simultaneously.

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The given converterhas the following requirements:
Vin:
250V
50V regulated
Load power: 200W
Switching frequency: 100kHz
Max. output ripple: 20mV
Vout:
A Q1
L G1 1
L1
Vin
Q2
Vn
C1
Vout
G2
(a) Differentiate the difference and advantage of the synchronous buck
converter with a typical buck converter circuit.
15
Transcribed Image Text:The given converterhas the following requirements: Vin: 250V 50V regulated Load power: 200W Switching frequency: 100kHz Max. output ripple: 20mV Vout: A Q1 L G1 1 L1 Vin Q2 Vn C1 Vout G2 (a) Differentiate the difference and advantage of the synchronous buck converter with a typical buck converter circuit. 15
(b)Sketch the waveforms of the gate drive voltages G1 and G2
assuming a duty cycle of 25% and a maximum gate drive voltage of
10V. How would you prevent the two MOSFET to turn on
simultaneously.
(c) Calculate L1 and C1, stating all necessary design criteria (e.g. value
of duty cycle at the required output voltage).
(d)Describe the circuit if a capacitor is connected across the input of the
synchronous buck converter. Draw the equivalent circuit to describe
the function.
Transcribed Image Text:(b)Sketch the waveforms of the gate drive voltages G1 and G2 assuming a duty cycle of 25% and a maximum gate drive voltage of 10V. How would you prevent the two MOSFET to turn on simultaneously. (c) Calculate L1 and C1, stating all necessary design criteria (e.g. value of duty cycle at the required output voltage). (d)Describe the circuit if a capacitor is connected across the input of the synchronous buck converter. Draw the equivalent circuit to describe the function.
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