LT3750EMS#TRPBF

Specialized ICS Overview

The LT3750EMS#TRPBF is a flyback converter controller designed for rapidly charging large capacitors to user-adjustable target voltages. It utilizes a patented boundary mode control scheme to minimize transition losses and reduce transformer size. The device operates from a wide input voltage range of 3V to 24V and features primary-side sensing, eliminating the need for output voltage dividers. Key electrical parameters include a VCC quiescent current of 1.6mA (not switching), a current limit comparator trip voltage of 78mV, and an operating temperature range of -40°C to 85°C.

Specialized ICS Feature Summary

• Patented boundary mode control minimizes transition losses and reduces transformer size
• Primary-side sense eliminates the need for output voltage divider resistors
• Wide input voltage range supports operation from 3V to 24V power sources
• Internal gate driver drives external NMOS gates to VCC – 2V

Specialized ICS Applications

• Emergency warning beacons
• Professional photoflash systems
• Security and inventory control systems
• High voltage power supplies
• Electric fences and detonators

Specialized ICS Procurement Notes

Verify the #TRPBF suffix indicates lead-free tape and reel packaging. Confirm the EMS package designation corresponds to the 10-lead MSOP plastic form factor. Ensure compatibility with surface mount assembly processes and check for any specific handling requirements associated with high-voltage capacitor charger controllers.

Specialized ICS Selection Notes

Select this component when rapid charging of large capacitors is required without secondary-side feedback components. Ensure the external NMOS drain-source voltage rating exceeds the reflected output voltage plus input voltage. Verify that the chosen flyback transformer meets the primary inductance restrictions to allow sufficient time for the controller to detect the output voltage target.

Specialized ICS Part Context

The LT3750 is part of Analog Devices' specialized power management portfolio, specifically engineered for high-voltage capacitor charging applications. It replaces discrete control solutions by integrating boundary mode detection, current limiting, and voltage comparison into a single 10-lead MSOP package, simplifying design for emergency and industrial high-voltage pulse systems.

Specialized ICS Replacement Considerations

LT3420/LT3420-1: 1.4A/1A photoflash capacitor charger with automatic top-off. LT3468/LT3468-1: 1.4A/1A/0.7A photoflash capacitor charger. LT3484-0/LT3484-1: 1.4A/0.7A/1A photoflash capacitor charger. LT3485-0/LT3485-1: 1.4A/0.7A/1A/2A photoflash capacitor charger with integrated IGBT driver.