LM3509SDX/NOPB

LED Driver IC Overview

The LM3509SDX/NOPB is a high-efficiency boost converter designed for white LED and OLED display applications. It features two independent current sinks capable of delivering up to 30 mA per channel. The device operates within an input voltage range of 2.7 V to 5.5 V and supports output voltages up to 21 V. It functions at a switching frequency of 1.27 MHz and is housed in a WSON-10 package. The component operates reliably across a temperature range of -40°C to +85°C.

LED Driver IC Feature Summary

• Integrates dual constant-current sinks for driving multiple LED strings or OLED panels with precise current regulation.
• Utilizes a boost topology to efficiently step up low input voltages for high-voltage LED loads.
• Includes thermal shutdown protection to safeguard the device during overtemperature conditions.

LED Driver IC Applications

• White LED backlighting systems
• OLED display driver circuits
• Portable electronic device illumination

LED Driver IC Procurement Notes

Verify the specific suffix 'SDX' indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status through official Texas Instruments documentation. Ensure the operating environment remains within the specified -40°C to +85°C range to maintain performance guarantees. Cross-reference the datasheet for exact pinout compatibility with existing PCB layouts.

LED Driver IC Selection Notes

Select this component for designs requiring dual-channel LED control from a single boost regulator. It is suitable for battery-powered devices due to its wide input voltage range. Consider the WSON-10 package size for space-constrained layouts. Verify that the required LED string voltage does not exceed the 21 V maximum output limit.

LED Driver IC Part Context

This part belongs to the LM3509 series, which focuses on efficient power management for lighting applications. It serves as a specialized solution for portable electronics needing compact, high-efficiency LED drivers. The series emphasizes integration to reduce external component count while maintaining high brightness control accuracy.

LED Driver IC Replacement Considerations

The LM3509SDE/NOPB is a documented alternative variant within the same family. Verify package differences and feature sets such as I2C control availability before substitution. Ensure electrical parameters match the original design requirements.