LM3553SD/NOPB

LED Driver IC Overview

The LM3553SD/NOPB is a dual flash LED driver IC from Texas Instruments, designed for mobile device camera applications. It operates within an input voltage range of 2.7 V to 5.5 V and delivers a maximum output current of 1.2 A. The device features I2C control capabilities and includes overvoltage protection (OVP). It is housed in a WSON-12 package and supports surface mount installation. The component functions reliably across a temperature range of -30°C to +85°C.

LED Driver IC Feature Summary

• Dual flash LED driver architecture with integrated I2C interface for digital control
• High-side current source enabling grounded cathode LED operation
• Built-in output overvoltage protection and short-circuit protection mechanisms

LED Driver IC Applications

• Mobile phone camera flash systems
• Smartphone dual-flash lighting modules
• Compact portable electronic devices requiring high-intensity LED driving

LED Driver IC Procurement Notes

Verify the specific suffix 'SD' against the manufacturer's official datasheet to confirm pinout and thermal pad configuration. Ensure compatibility with the target PCB footprint for the WSON-12 package. Confirm that the design accounts for the humidity sensitivity level indicated in the product specifications before assembly.

LED Driver IC Selection Notes

Select this component when a single-chip solution for dual flash LEDs is required with digital I2C control. It is suitable for designs needing a compact WSON-12 footprint and operation from standard lithium-ion battery voltages. Consider the 1.2 A output capability relative to the specific LED forward current requirements of the application.

LED Driver IC Part Context

This part belongs to the LM3553 series of LED drivers from Texas Instruments. It is specifically engineered for mobile photography applications where space is limited and precise flash timing is critical. The series integrates power switches and control logic to simplify the design of dual-LED flash circuits in smartphones and tablets.

LED Driver IC Replacement Considerations

Consult the Texas Instruments official cross-reference documentation for verified substitute part numbers. Do not assume functional equivalence with other LM35xx series parts without verifying pinout and electrical parameter alignment.