LT3837EFE#TRPBF

Overview

The LT3837EFE#TRPBF is an isolated switching regulator controller designed for medium power flyback topologies, typically supporting applications from 10W to 60W. It operates as a synchronous rectifier DC-DC switch controller with a fixed switching frequency of 100kHz and a maximum duty cycle of 0.88. The device accepts a supply voltage range of 4.5V to 20V and provides one positive output capable of isolation. It utilizes current mode PWM control and features clock synchronization capabilities. The component is housed in a 16-TSSOP package with an exposed pad (EP) and is rated for operation between -40°C and 125°C junction temperature.

Feature Summary

• Synchronous rectification capability for improved efficiency in flyback converters
• Clock synchronization function to allow external frequency alignment
• Current mode PWM control architecture for stable regulation
• Integrated enable, frequency control, and on-time control features

Applications

• Medium power isolated flyback power supplies
• Industrial power conversion systems requiring 10W to 60W output
• AC/DC offline switched-mode power supplies
• Isolated DC-DC converter designs with step-up or step-down requirements

Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when ordering. Confirm that the 16-TSSOP-EP footprint matches the target PCB layout, particularly regarding the exposed thermal pad requirements. Ensure the design accounts for the specified 4.5V to 20V supply range and the 100kHz switching frequency constraints during component sourcing and validation.

Selection Notes

Select this controller for designs requiring synchronous rectification in medium-power isolated applications. Consider the 100kHz fixed frequency and 0.88 max duty cycle when designing transformer parameters. Evaluate the need for clock synchronization if multiple converters operate in proximity. Verify thermal management strategies for the TSSOP-EP package given the 125°C junction temperature limit.

Part Context

The LT3837EFE#TRPBF belongs to the LT3837 family of isolated switching regulator controllers manufactured by Analog Devices Inc. This series targets medium-power flyback applications, offering integrated synchronous rectifier drive and current mode control. The EFE variant specifies the commercial temperature grade and tube/tray packaging option, while the TRPBF suffix denotes the tape and reel delivery format for automated assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.