LM27952SDX/NOPB

Overview

The LM27952SDX/NOPB is a four-channel LED lighting driver IC from Texas Instruments, designed for white LED applications. It utilizes an adaptive 1.5x/1x switched capacitor topology to regulate current. The device operates with a supply voltage range of 3 V to 5.5 V and delivers up to 30 mA per channel. It features direct PWM dimming control and functions at a switching frequency of 750 kHz. The output voltage ranges from 2.5 V to 3.9 V. Packaged in a 14-pin LLP (LLP-14) surface-mount package, it supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrates four independent regulated current outputs for multi-channel LED arrays
• Employs adaptive charge pump topology to optimize efficiency across varying input conditions
• Supports direct pulse-width modulation (PWM) dimming for precise brightness control

Applications

• White LED backlighting systems
• General LED illumination drivers
• Portable electronic display backlights

Procurement Notes

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as defined by Texas Instruments. Confirm the 'SDX' designation corresponds to the reel packaging format with the specified quantity. Ensure the LLP-14 footprint matches the target PCB layout requirements. Cross-reference the latest datasheet revision for any updates to electrical characteristics or mechanical drawings prior to final procurement.

Selection Notes

Select this component when designing circuits requiring four isolated LED channels driven from a low-voltage source. The adaptive charge pump architecture is suitable for applications where input voltage may vary relative to the LED forward voltage drop. Consider the 30 mA output limit per channel when determining LED string configurations. The LLP-14 package offers a compact solution for space-constrained portable designs compared to larger WSON variants.

Part Context

This part belongs to the LM27952 series of LED drivers. It serves as the tape-and-reel variant of the LM27952SD/NOPB. The series focuses on efficient power management for white LEDs using switched capacitor technology. It complements other Texas Instruments PMIC solutions for integrated power distribution in consumer electronics.

Replacement Considerations

LM27952SD/NOPB is a documented direct substitute offering identical functionality in cut-tape or smaller reel formats.