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Product Detailed Parameters
- Description：IC LED DRVR LIN PWM 25.3MA 44QFN
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Constant Current
- Internal Switch(s)：No
- Number of Outputs：36
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：25.3mA
- Frequency：-
- Dimming：PWM
- Applications：LED Lighting
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：44-PowerWFQFN
- Supplier Device Package：44-QFN (5x5)
- Grade：-
- Qualification：-
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Overview
The IS31FL3246-QFLS4-TR is a 36-channel LED lighting driver IC manufactured by Lumissil Microsystems. It features a QFN-44 (5.0mm x 5.0mm) package and supports Boost and Buck topologies. The device operates on an input voltage range of 2.7 V to 5.5 V, with a maximum supply current of 4.5 mA. Each output channel provides a constant current of 23 mA. The operating frequency ranges from 127 Hz to 128 kHz, and the adjustable output voltage accommodates various LED configurations. It functions within a temperature range of -40°C to +125°C.
Feature Summary
- Integrates 36 independent constant current channels for high-density LED matrix control.
- Supports both Boost and Buck switching topologies for flexible power management.
- Enables precise brightness control through PWM dimming capabilities.
Applications
- General-purpose LED matrix drivers
- Industrial LED lighting applications
- LED display systems
Procurement Notes
Verify the specific suffix QFLS4 to confirm the automotive-grade qualification and tape-and-reel packaging format. Ensure the design accounts for the 44-pin QFN thermal pad requirements and the specified humidity sensitivity level during assembly. Confirm that the 2.7V to 5.5V input range aligns with the target system power supply constraints.
Selection Notes
Select this component when a high channel count is required in a compact footprint. The integrated Boost and Buck topology allows for efficient driving of various LED forward voltages without external complex circuitry. Consider the 23 mA per channel limit and the 125°C maximum junction temperature when designing the thermal solution for dense arrays.
Part Context
This part belongs to the IS31FL3x series of industrial LED drivers from Lumissil Microsystems. These devices are designed to address general lighting applications with monolithic solutions. The series emphasizes EMI noise reduction technology and supports a wide range of LED counts, positioning this model as a specialized solution for high-channel-count matrix displays.
Replacement Considerations
The IS31FL3246-QFLS4-EB is an evaluation board for this driver, not a direct replacement. No other specific substitute part numbers are publicly confirmed in the provided documentation. Engineers should verify pinout and electrical compatibility if considering alternative drivers from the same family or competitors.
