LM3509SD/NOPB

LED Driver IC Overview

The LM3509SD/NOPB is a high-efficiency boost LED driver IC designed for white LEDs and OLED displays. It features two independent current sinks, each capable of delivering up to 30 mA. 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 utilizes a fixed switching frequency of 1.27 MHz and is housed in a WSON-10 package. The operational temperature range spans from -40°C to +85°C.

LED Driver IC Feature Summary

• Dual constant current sinks for independent channel control
• High efficiency boost topology optimized for LED applications
• Integrated I2C control interface for configuration

LED Driver IC Applications

• White LED backlighting systems
• OLED display drivers
• Portable electronic devices requiring efficient LED power management

LED Driver IC Procurement Notes

Verify the specific suffix 'SD' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with system voltage requirements (2.7V–5.5V) and thermal constraints (-40°C to +85°C). Cross-reference the exact part number with Texas Instruments documentation to avoid confusion with variants such as SDE or SDX.

LED Driver IC Selection Notes

Select this component when designing circuits requiring dual-channel LED drive with I2C programmability. It is suitable for space-constrained designs due to the WSON-10 footprint. Consider the 1.27 MHz switching frequency for inductor size trade-offs. Verify that the load does not exceed the 30 mA per channel limit and that the output voltage remains within the 21 V maximum rating.

LED Driver IC Part Context

The LM3509 series comprises high-efficiency boost converters tailored for lighting applications. The LM3509SD/NOPB variant specifically denotes the WSON-10 package configuration. This family integrates control logic and power switches to simplify LED driver design while maintaining high energy conversion efficiency across varying input conditions.

LED Driver IC Replacement Considerations

Consult the Texas Instruments LM3509 datasheet for direct pin-compatible alternatives within the same family, such as LM3509SDE/NOPB or LM3509SDX/NOPB. Verify functional equivalence regarding I2C control and current sink capabilities before substitution.