LM3502SQ-44

$2.50

Description：IC LED DRV RGLTR PWM 16WQFN
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:5ca93edb695e Category: LED Drivers IC Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC LED DRV RGLTR PWM 16WQFN
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)
Type：DC DC Regulator
Topology：Step-Up (Boost)
Internal Switch(s)：Yes
Number of Outputs：2
Voltage - Supply (Min)：2.5V
Voltage - Supply (Max)：5.5V
Voltage - Output：44V
Current - Output / Channel：750mA (Switch)
Frequency：1MHz
Dimming：PWM
Applications：Backlight
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Package / Case：16-WFQFN Exposed Pad
Supplier Device Package：16-WQFN (4x4)
Grade：-
Qualification：-

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LM3502SQ-44

Overview

The LM3502SQ-44 is a dual-output boost DC-DC converter designed for white LED backlight applications. It operates within a supply voltage range of 2.5V to 5.5V and delivers a maximum switch current of 750mA per channel. The device integrates an internal power switch and supports PWM dimming control. It functions at a switching frequency of 1MHz and is housed in a 16-WQFN (4x4 mm) package with exposed pad. The component is rated for an operating temperature range of -40°C to 85°C.

Feature Summary

Dual-output constant current regulation for independent LED string driving
Integrated high-efficiency boost topology with internal power switch
Supports PWM dimming control for precise brightness adjustment
Compact surface-mount packaging suitable for space-constrained designs

Applications

LCD backlight drivers for portable electronics
White LED illumination systems
Mobile phone display backlights
Automotive interior lighting modules

Procurement Notes

Verify the specific suffix designation, as the LM3502SQ-44/NOPB variant indicates RoHS compliance while other versions may differ. Confirm lead times and availability status, as this part number has been reported as End-of-Life (EOL) by some distributors. Ensure the procurement source provides valid datasheets matching the exact ordering code to guarantee correct electrical characteristics and pinout configuration.

Selection Notes

Select this component when dual-channel LED driving is required from a single low-voltage supply. The 1MHz switching frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 750mA output limit when sizing LED strings. Verify thermal dissipation requirements due to the compact QFN package footprint and ensure the input voltage range aligns with the system battery profile.

Part Context

This device belongs to the LM3502 family of LED drivers from Texas Instruments. It shares architectural similarities with the LM3503 but differs in specific control interfaces and output configurations. The SQ-44 suffix denotes the specific output voltage rating and package type within the broader product line, distinguishing it from variants like the LM3502SQ-35 which targets different application parameters.