LM3502SQX-16

LED Driver IC Overview

The LM3502SQX-16 is a high-performance step-up converter designed for white LED applications. It features two independent outputs capable of driving up to 400mA per channel with a maximum output voltage of 16V. Operating from a supply voltage range of 2.5V to 5.5V, the device integrates an internal switch and supports both analog and PWM dimming functions. The IC operates at a fixed switching frequency of 1MHz and is housed in a compact 16-WQFN (4x4) package.

LED Driver IC Feature Summary

• Integrates dual independent boost converters for multi-segment LED backlighting
• Supports precise brightness control via combined analog and PWM dimming inputs
• Includes internal power switch to minimize external component count
• Optimized for low input voltage operation suitable for single-cell battery systems

LED Driver IC Applications

• White LED backlight drivers for mobile phones
• LED illumination for portable media players
• Backlighting solutions for handheld gaming devices
• Segmented LED displays in consumer electronics

LED Driver IC Procurement Notes

Verify the specific suffix 'SQX-16' against the official Texas Instruments datasheet to ensure correct pinout and thermal pad configuration. Confirm RoHS compliance status as indicated by the '/NOPB' designation if applicable. Check current lifecycle status, as this part may be discontinued or subject to last-time buy restrictions. Ensure the ordering quantity matches the tape and reel specifications provided in the manufacturer's documentation.

LED Driver IC Selection Notes

Select this component when designing circuits requiring dual-channel LED drive from a single cell lithium-ion battery. Consider the 1MHz switching frequency for smaller passive component sizes compared to lower-frequency alternatives. Evaluate the 400mA switch current limit against the target LED forward current requirements. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range for reliable performance.

LED Driver IC Part Context

The LM3502 belongs to Texas Instruments' family of high-efficiency step-up converters tailored for LED lighting. It complements similar models like the LM3503 by offering dedicated dual-output architecture. This series is engineered to provide constant current regulation for white LEDs, ensuring uniform brightness across multiple segments in portable electronic devices.

LED Driver IC Replacement Considerations

• LM3502SQ-35
• LM3503SQ-16/NOPB

LED Driver IC FAQ

What dimming methods are supported by the LM3502SQX-16?

The device supports both analog dimming and pulse-width modulation (PWM) dimming for precise brightness control.

What is the maximum output voltage capability of this IC?

The LM3502SQX-16 can generate a maximum output voltage of 16V per channel.