IS31FL3726-ZLS2

Overview

The IS31FL3726-ZLS2 is an LED driver IC from Lumissil Microsystems, designed for backlight applications. It features a linear topology with a shift register structure and provides 16 output channels. Each channel supports a maximum output current of 60mA, driven by a PWM dimming interface operating at a frequency of 20MHz. The device operates within a supply voltage range of 3.3V to 5.5V and delivers a maximum output voltage of 4V. It is housed in a 24-QFN (4x4mm) package with exposed pads, suitable for surface mount installation. The component is rated for an ambient operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates 16 constant-current sink channels with internal switches for direct LED control
• Supports high-frequency PWM dimming for precise brightness adjustment without visible flicker
• Utilizes a serial shift register interface to minimize microcontroller pin usage
• Includes built-in thermal protection mechanisms to ensure operational safety

Applications

• LCD panel backlighting systems
• Portable electronic device displays
• Automotive instrument cluster illumination
• Industrial control panel indicators

Procurement Notes

Verify the specific suffix ZLS2 against the manufacturer's official datasheet to confirm exact electrical characteristics and packaging specifications. Confirm RoHS compliance status and moisture sensitivity level prior to integration. Check for end-of-life notices or alternative part recommendations from Lumissil Microsystems to ensure long-term supply chain stability for production runs.

Selection Notes

Select this component when designing systems requiring multiple individually addressable LEDs with low power consumption. The linear topology makes it suitable for applications where cost efficiency is prioritized over high-voltage drive capabilities. Ensure the PCB layout accommodates the 24-QFN package dimensions and thermal pad requirements for adequate heat dissipation during continuous operation.

Part Context

This device belongs to the IS31FL37xx series of LED lighting drivers from Lumissil Microsystems. These components are engineered for high-density LED arrays, offering integrated solutions that reduce external component counts. The series focuses on providing reliable current regulation and dimming control for various display and signaling applications across consumer and industrial markets.

Replacement Considerations

The IS31FL3726A-QFLS4-TR is listed as a manufacturer-recommended substitute. Verify pin compatibility and electrical parameter alignment before substitution.

FAQ

What is the maximum output current per channel?

The maximum output current per channel is 60mA.

Does the device support PWM dimming?

Yes, the IS31FL3726-ZLS2 supports PWM dimming with a frequency of 20MHz.