LM36923HYFFR

LED Driver IC Overview

The LM36923HYFFR is a Texas Instruments LED lighting driver IC designed for high-efficiency triple-string white LED applications. It utilizes a boost DC-DC converter topology to regulate current across three independent output channels, each capable of delivering up to 25 mA. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports switching frequencies of 500 kHz and 1 MHz. It achieves a maximum output voltage of 38 V and features I2C and PWM dimming capabilities. Packaged in a compact 12-DSBGA format, it functions reliably between -40°C and +85°C.

LED Driver IC Feature Summary

• Integrates a boost converter with three independent regulated current outputs for multi-string LED arrays.
• Supports digital control via I2C interface and analog brightness adjustment through PWM dimming signals.
• Includes an internal power switch to minimize external component count and reduce overall solution size.

LED Driver IC Applications

• Backlighting systems for mobile devices
• Triple-string white LED illumination circuits
• Portable electronic display enhancement

LED Driver IC Procurement Notes

Verify the specific suffix 'YFFR' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure the ordering part number matches the required RoHS compliance status and moisture sensitivity level. Cross-reference the supplier's documentation with the original Texas Instruments product data to validate authenticity and manufacturing origin before procurement.

LED Driver IC Selection Notes

Select this component when designing circuits requiring three separate LED strings driven from a single boost regulator. It is suitable for battery-powered devices operating between 2.5 V and 5.5 V where space constraints necessitate a small DSBGA footprint. Consider the 25 mA per channel limit and 38 V maximum output voltage when determining LED string configurations and forward voltage requirements.

LED Driver IC Part Context

This part belongs to the LM36923H series of LED drivers from Texas Instruments. It is distinct from other series like the LM3643, which targets dual-channel flash applications with higher current capabilities. The LM36923H focuses on efficient regulation for steady-state white LED backlighting rather than high-intensity strobe functions.

LED Driver IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts if considering alternative Texas Instruments LED drivers with similar boost topologies and pin counts.