LT3753EFE#TRPBF

Overview

The LT3753EFE#TRPBF is a current mode PWM controller optimized for active clamp forward converter topologies, supporting up to 100V input operation. It features a programmable volt-second clamp enabling primary switch duty cycles above 50% for improved component utilization. The device operates within a switching frequency range of 100kHz to 500kHz and includes synchronous output control for secondary side rectification. It functions with a supply voltage between 8.5V and 100V, operating across temperatures from -40°C to 125°C. The component is housed in a 38-lead plastic TSSOP package with missing pins for high voltage spacing.

Feature Summary

• Optimized for active clamp forward converter topology to reduce switch voltage stress and increase efficiency
• Programmable volt-second clamp allows primary switch duty cycles exceeding 50%
• Synchronous output available for controlling secondary side synchronous rectification

Applications

• Active clamp forward converter designs requiring up to 100V input
• High efficiency power supplies utilizing synchronous rectification
• Automotive electronics applications compatible with specified temperature ranges

Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm the 38-lead TSSOP EP package matches your PCB footprint requirements. Ensure the design supports the required 8.5V to 100V operating supply voltage range. Check that the application environment stays within the -40°C to 125°C temperature limits. Validate compatibility with the 100kHz to 500kHz switching frequency settings.

Selection Notes

Select this controller when designing active clamp forward converters needing high input voltage tolerance up to 100V. It is suitable for applications requiring duty cycles above 50% via the programmable volt-second clamp. Choose this part if synchronous rectification control on the secondary side is necessary. Consider the 38-lead TSSOP package for high voltage spacing requirements in dense layouts.

Part Context

The LT3753EFE#TRPBF belongs to the LT3753 family of active clamp synchronous forward controllers manufactured by Analog Devices. It is designed to replace older forward converter solutions by offering improved efficiency through active clamp techniques. The device integrates current mode PWM control specifically tuned for forward topologies, distinguishing it from generic flyback or buck controllers.

Replacement Considerations

LT3752EFE-1#TRPBF serves as a related alternative within the same product family.