ppt

1. CAREER POINT UNIVERSITY
Buck-Boost Converter
SUBMITTED BY SUBMITTED TO
Vinit kr. Chauhan Mr. Somesh Sir
M.E. 3rd year
Uid: k10972

2. CONTENT
Introduction
Power Circuit
Operation Of Power Circuit Steps
Duty Ratio
Advantages
Disadvantages
Conclusion

8. step3:
When mosfet is on in next cycle
load is isolated from voltage source in this
case charged capacitor across load will
maitain voltage across load

9. DUTY RATIO
• Duty ratio(D) defind as Ton/T
here, Ton=ON time
T=time period of gate signal
• D=Ton/T
Ton=TD
T= Toff + Ton
Toff =T-Ton

10. .
• input current and output current have small
ripple
• requirement of capacitor C1 with large ripple
current capability

11. CONCLUSION
• Prefer Buck, Boost converters
• If higher and lower voltages needed, use
Buck-Boost, Cuk
• If four-quadrant operation needed, use full-
bridge