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Product Detailed Parameters
- Description：IC LED DRVR LIN PWM 78MA 28QFN
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Constant Current
- Internal Switch(s)：No
- Number of Outputs：18
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：78mA
- Frequency：-
- Dimming：PWM
- Applications：LED Lighting
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：28-WFQFN Exposed Pad
- Supplier Device Package：28-QFN (5x5)
- Grade：-
- Qualification：-
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Overview
The IS31FL3238-QFLS4-TR is an 18-channel LED driver IC from Lumissil Microsystems, housed in a QFN-28 package (4.0mm x 4.0mm). It operates on a supply voltage range of 2.7 V to 5.5 V with a maximum power consumption of 10 mA. The device delivers a constant output current of 78 mA per channel and supports PWM dimming. It integrates boost and buck topologies with a switching frequency of 1 MHz. The component functions within a temperature range of -40°C to +125°C and includes short circuit and thermal protection features.
Feature Summary
- Integrates 18 independent constant current channels for multi-zone LED control
- Supports PWM dimming for precise brightness adjustment
- Includes integrated boost and buck converter topologies
- Provides hardware-level short circuit and thermal protection
Applications
- Automotive interior lighting systems
- Dashboard and instrument cluster illumination
- Ambient cabin lighting modules
- LED matrix backlighting applications
Procurement Notes
Verify the specific suffix QFLS4-TR against official Lumissil documentation to confirm the tape and reel packaging configuration. Ensure compatibility with automotive qualification standards if used in vehicle electronics. Cross-reference the datasheet revision date to validate parameter accuracy before finalizing procurement specifications.
Selection Notes
Select this component when an 18-channel solution with integrated power management is required. The wide operating temperature range suits harsh environments. Verify that the 78 mA output current meets the specific LED string requirements. Confirm that the QFN-28 footprint aligns with the target PCB layout constraints.
Part Context
This part belongs to the IS31FL3x series of industrial LED drivers designed for high-reliability applications. The series emphasizes EMI noise reduction and broad LED support capabilities. The IS31FL3238 variant specifically targets complex lighting architectures requiring multiple independent channels within a compact form factor.
Replacement Considerations
Check for direct pin-compatible alternatives within the IS31FL3x family. Verify channel count and current ratings match exactly. Review package dimensions to ensure mechanical interchangeability without PCB redesign.
