LM3552SD

LED Driver IC Overview

The LM3552SD is a step-up DC-DC converter designed for driving high-power white LEDs in camera flash applications. It integrates an internal power switch capable of delivering up to 1A output current. The device operates within a supply voltage range of 2.7V to 5.5V and features a fixed switching frequency of 1.25MHz. It utilizes a 14-WSON (4x4mm) package with an exposed pad for thermal management. The component supports analog dimming control and includes built-in protection mechanisms such as overvoltage protection and flash timeout safety features.

LED Driver IC Feature Summary

• Integrates a high-efficiency boost converter topology with an internal power switch for compact LED driver designs
• Provides precise current regulation suitable for high-power white LED flash illumination requirements
• Includes hardware-based flash timeout protection to ensure safe operation during extended pulse durations

LED Driver IC Applications

• Camera flash modules
• Mobile phone lighting systems
• Compact portable electronic devices requiring high-intensity LED bursts

LED Driver IC Procurement Notes

Verify the specific ordering suffix, as the base part number may correspond to various tape-and-reel or cut-tape configurations. Confirm RoHS compliance status through official manufacturer documentation, as legacy variants may differ. Ensure the supplier provides valid traceability records for the 14-WSON package. Cross-reference the exact datasheet revision to confirm pinout compatibility and electrical characteristics before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component for applications requiring a single-channel, high-current LED driver with minimal external component count. The integrated switch eliminates the need for discrete power transistors. Consider the 1.25MHz switching frequency when designing input and output filtering networks. Evaluate the thermal performance of the exposed pad layout against the expected duty cycle and ambient temperature constraints.

LED Driver IC Part Context

The LM3552 belongs to Texas Instruments' family of dedicated LED lighting drivers. It serves as a specialized solution for mobile photography enhancements. The SD variant denotes the specific surface-mount packaging configuration. This IC addresses the demand for bright, fast-response illumination in space-constrained consumer electronics.

LED Driver IC Replacement Considerations

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