LT3909HDD#PBF

LED Driver IC Overview

The LT3909HDD#PBF is a dual-output step-up DC-DC regulator designed for LED driving applications. It operates within an input voltage range of 2.9V to 40V and provides two independent output channels, each capable of delivering up to 50mA. The device integrates internal switches and supports both analog and PWM dimming control methods. It features ±2% current matching accuracy between the two outputs. The component is housed in a 12-WFDFN exposed pad package with surface mount mounting type.

LED Driver IC Feature Summary

• Dual-channel step-up topology with integrated internal switches
• Supports simultaneous analog and PWM dimming control
• High precision ±2% current matching between output channels

LED Driver IC Applications

• Automotive LED lighting systems
• Multi-string LED driver circuits
• Industrial illumination control

LED Driver IC Procurement Notes

Verify the specific suffix '#PBF' confirms lead-free and RoHS compliance status as per manufacturer specifications. Ensure the 'DD' package designation matches the required 12-WFDFN footprint on the PCB layout. Confirm that the operating temperature range of -40°C to 150°C aligns with the thermal requirements of the target automotive or industrial environment before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when a single IC solution is needed to drive two separate LED strings from a wide input voltage range. The dual-output architecture simplifies board space compared to using two discrete regulators. Consider the 50mA per channel limit to ensure it meets the forward current requirements of the intended LEDs. The integrated switch eliminates the need for external power transistors, reducing component count.

LED Driver IC Part Context

This part belongs to the LT3909 family of high-frequency step-up LED drivers manufactured by Analog Devices Inc. (formerly Linear Technology). It is specifically engineered for applications requiring precise current regulation and dimming capabilities. The device represents a compact solution for managing multiple LED loads in space-constrained environments such as automotive instrumentation and interior lighting.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing design files if considering alternative dual-output boost converters.