IS31BL3506A-STLS2-TR

Overview

The IS31BL3506A-STLS2-TR is an LED lighting driver IC manufactured by Lumissil Microsystems. It functions as a 35V step-up converter with an integrated MOSFET switch, designed for driving series strings of LEDs. The device operates within a supply voltage range up to 5.5V and supports an output current of 20 mA. It utilizes a boost topology and features a switching frequency of 1 MHz. The component is housed in a DFN-EP-8 package and is rated for operation between -40°C and +85°C.

Feature Summary

• Integrates a high-voltage step-up converter with an internal MOSFET switch for efficient LED string driving
• Supports analog and PWM dimming control methods for brightness adjustment
• Operates at a fixed 1 MHz switching frequency to minimize external component size

Applications

• LED backlighting systems
• General LED illumination circuits
• Portable electronic device lighting

Procurement Notes

Verify the specific suffix STLS2 against the manufacturer's official datasheet to confirm pinout and packaging details. Confirm RoHS compliance status and moisture sensitivity level (MSL) ratings prior to assembly planning. Ensure the design accounts for the recommended operating temperature range of -40°C to +85°C. Cross-reference the ordering number with Lumissil Microsystems documentation to avoid substitution errors with similar variants like the DLS2 or TTLS2 packages.

Selection Notes

Select this component when a compact solution for driving series-connected LEDs from a low-voltage source is required. The integrated MOSFET reduces external bill of materials compared to discrete solutions. Consider the 20 mA output limit and 35V maximum voltage rating to ensure compatibility with the target LED load configuration. Verify that the DFN-EP-8 package fits the available PCB real estate and thermal requirements.

Part Context

This part belongs to the IS31BL3506B/A series of LED drivers from Lumissil Microsystems. These devices are specialized power management ICs focused on single-output boost conversion for lighting applications. The series shares core architecture but may vary in package options and specific electrical tolerances depending on the suffix designation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Lumissil Microsystems directly for qualified alternatives or pin-compatible upgrades.