LM3533TME-40/NOPB

LED Driver IC Overview

The LM3533TME-40/NOPB is a high-efficiency white LED driver IC from Texas Instruments, designed for backlight applications. It integrates a DC-DC converter with boost and switched-capacitor (charge pump) topology to drive up to seven LED channels. The device operates within a supply voltage range of 2.7V to 5.5V and supports PWM dimming control. Each channel provides an output current of 30mA, with a maximum output voltage of 40V. The switching frequency is adjustable between 500kHz and 1MHz. It is housed in a 20-DSBGA package and functions reliably across a junction temperature range of -40°C to 125°C.

LED Driver IC Feature Summary

• Integrates a combined boost and charge pump DC-DC converter for flexible LED string configurations.
• Provides independent regulation for up to seven LED channels with precise current control.
• Supports digital PWM dimming for efficient brightness adjustment without color shift.

LED Driver IC Applications

• LCD backlight drivers for portable electronics
• White LED lighting modules
• Display illumination systems

LED Driver IC Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free packaging compliant with RoHS standards. Confirm the '-40' designation matches the required extended industrial temperature range specifications for your application environment. Ensure the 20-DSBGA footprint aligns with your PCB layout constraints before finalizing procurement orders.

LED Driver IC Selection Notes

Select this component when multiple LED strings require individual regulation within a single power stage. The integrated charge pump allows operation even when the input voltage is lower than the forward voltage of the LED strings. Consider the 30mA per channel limit and the total power dissipation capabilities inherent to the small DSBGA package for thermal management planning.

LED Driver IC Part Context

This part belongs to the LM3533 family of LED drivers, which are optimized for high-efficiency white LED driving. Unlike simpler linear drivers, it utilizes complex switching topologies to minimize power loss. The TME variant specifically denotes the tape-and-reel packaging format suitable for automated surface-mount assembly processes.

LED Driver IC Replacement Considerations

Direct pin-to-pin replacements within the same series include LM3533TMX-40A/NOPB. Verify that any substitute maintains the identical 20-DSBGA package dimensions and electrical characteristics to ensure compatibility with existing board designs.