LT3761HMSE#PBF

LED Driver IC Overview

The LT3761HMSE#PBF is a DC/DC controller designed for constant-current and constant-voltage regulation. It operates with an input voltage range of 4.5V to 60V and supports output voltages up to 100V. The device features a switching frequency range of 100kHz to 1MHz and functions within an operating temperature range of -40°C to +150°C. It integrates a programmable internal PWM generator capable of producing dimming ratios up to 25:1, while external signals can drive the PWM output for ratios up to 3000:1. The component utilizes CTRL input for additional analog dimming capabilities.

LED Driver IC Feature Summary

• Integrates a programmable internal PWM generator for precise LED dimming without external components
• Supports high dimming ratios via external signal driving on the PWM output pin
• Provides dual dimming control through integrated PWM generation and analog CTRL input
• Designed for high input voltage operation suitable for various power supply configurations

LED Driver IC Applications

• High-power LED lighting systems requiring precise current regulation
• Automotive exterior and interior LED illumination applications
• Industrial lighting fixtures utilizing flyback or SEPIC topologies
• Battery-powered LED drivers needing wide input voltage tolerance

LED Driver IC Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm the HMSE package variant matches thermal requirements. Ensure the supplier provides official Analog Devices documentation for the LT3761 series. Cross-reference the part number against the manufacturer's active status list to avoid obsolete stock. Validate that the component meets the specified operating temperature range for the intended environment.

LED Driver IC Selection Notes

Select this controller for designs requiring integrated PWM generation to reduce external component count. Consider the 60V input limit when choosing between this model and higher voltage variants. Evaluate the need for external versus internal PWM dimming based on system complexity. The 100kHz to 1MHz frequency range allows flexibility in passive component sizing. Ensure the application topology, such as Flyback or SEPIC, aligns with the controller's design specifications.

LED Driver IC Part Context

The LT3761HMSE#PBF belongs to the LT3761/LT3761-1 family of DC/DC controllers from Analog Devices. This series is specifically engineered for LED driver applications, offering both constant current and constant voltage regulation modes. The HMSE designation refers to the specific surface-mount package type used for this variant. The component is part of the True Color PWM™ series, emphasizing accurate color rendering in lighting applications.

LED Driver IC Replacement Considerations

The LT3761-1 is a related variant within the same family. Verify functional equivalence before substitution. Check datasheet differences regarding internal PWM generation capabilities. Ensure package compatibility for direct replacement. Confirm electrical parameters match the original design requirements.