SNVA790A
October 2020 – July 2022
LMR36520
Abstract
Trademarks
1
Introduction
2
Fly-Buck Converter Device Operation
2.1
Output Current Equations and Considerations
3
LMR36520 Fly-Buck Converter Design
3.1
Coupled Inductor
3.2
Primary Output Capacitor
3.3
Rectifying Diode
3.4
Secondary Output Capacitor
3.5
Preload Resistor
3.6
Zener Diode
3.7
Snubber Circuit
4
Experimental Results
4.1
Steady State
4.2
Secondary Output Voltage
4.3
Load Transient
4.4
Start-up
4.5
Output Current
5
Conclusion
6
References
7
Revision History
6
References
Texas Instruments,
Designing a Simple and Low Cost Flybuck Solution with the TPS54308
application report.
Texas Instruments,
LMR36520
SIMPLE SWITCHER®
4.2-V to 65-V, 2-A Synchronous Step-down Converter
data sheet.
Texas Instruments,
AN-2292 Designing an Isolated Buck (Flybuck) Converter
application report.
Texas Instruments,
Designing Isolated Rails on the Fly with Fly-Buck Converters
application report.