LM3432SQX/NOPB

Overview

The LM3432SQX/NOPB is a six-output DC-DC boost regulator designed for LED backlight applications. It operates with an input voltage range of 6V to 40V and delivers up to 40mA per channel, supporting a maximum output voltage of 80V. The device integrates internal switches and supports both analog and PWM dimming methods. Packaged in a 24-WQFN (4x5) surface-mount format, it functions within a junction temperature range of -40°C to 125°C.

Feature Summary

• Integrates six independent constant-current channels for multi-segment LED driving
• Supports simultaneous analog and PWM dimming control for brightness adjustment
• Features internal power switches to minimize external component count
• Includes thermal shutdown protection for enhanced operational safety

Applications

• LCD panel backlighting systems
• Multi-zone LED illumination arrays
• Portable electronic display modules

Procurement Notes

Verify the specific suffix 'SQX' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region. Ensure the selected variant matches the required operating temperature range and pinout configuration for the target PCB layout.

Selection Notes

Select this component when designing circuits requiring multiple synchronized LED channels from a single boost converter topology. It is suitable for applications needing precise current regulation across six outputs without external sense resistors for each channel. Consider the 24-WQFN package dimensions and thermal requirements during the mechanical design phase to ensure adequate heat dissipation.

Part Context

This part belongs to the Texas Instruments LM3432 family of LED drivers. The 'SQX' designation indicates a specific reel-packaged version of the SQ variant. It shares core functionality with other LM3432 models but differs in packaging and shipping quantities. The NOPB suffix confirms lead-free construction compliant with environmental standards.

Replacement Considerations

Direct substitutes include LM3432SQ/NOPB and LM3432BSQ/NOPB. Verify pin compatibility and electrical parameters before substitution. Cross-reference datasheets to ensure equivalent dimming capabilities and output current ratings match the original design requirements.