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Product Detailed Parameters
- Description：IC LED DRV LIN PWM 34.5MA 40UQFN
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：-
- Internal Switch(s)：No
- Number of Outputs：11
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：34.5mA
- Frequency：24kHz
- Dimming：PWM
- Applications：General Purpose
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：40-UFQFN Exposed Pad
- Supplier Device Package：40-UQFN (5x5)
- Grade：-
- Qualification：-
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Overview
The IS31FL3743A-QULS4-TR is a linear LED driver IC manufactured by Lumissil Microsystems. It features 11 output channels with a constant current of 34.5mA per channel. The device operates on a supply voltage range of 2.7V to 5.5V and supports PWM dimming at a frequency of 24kHz. It is housed in a 40-UQFN (5x5) package with exposed pad, suitable for surface mount installation. The component functions within an ambient temperature range of -40°C to 125°C.
Feature Summary
- Integrates 11 independent linear LED drive channels for multi-channel lighting control
- Supports PWM dimming functionality for brightness adjustment
- Operates with a wide supply voltage range from 2.7V to 5.5V
- Designed for high-temperature environments up to 125°C
Applications
- General purpose LED lighting systems
- Industrial signaling applications
- Consumer electronics display backlighting
Procurement Notes
Verify the specific suffix QULS4-TR against official Lumissil documentation to confirm the exact package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint for the 40-UQFN (5x5) package. Confirm that the required 34.5mA output current meets the design specifications for the connected LEDs. Check RoHS compliance status if required by local regulations.
Selection Notes
Select this component when a moderate number of LED channels (11) are required without internal switching complexity. The linear topology is suitable for low-voltage applications where efficiency losses are acceptable. The 24kHz PWM frequency should be evaluated against audible noise constraints in the final assembly. Consider the thermal dissipation capabilities of the UQFN package for the expected power load.
Part Context
This part belongs to the IS31FL37xx series of LED drivers from Lumissil Microsystems, which focuses on integrated solutions for lighting and signaling. The series typically offers various channel counts and interface options. This specific model emphasizes linear regulation for simplicity and cost-effectiveness in general-purpose applications.
Replacement Considerations
Direct substitutes must match the 11-channel count, 34.5mA output current, and 40-UQFN package. Verify pin-to-pin compatibility and electrical characteristics such as supply voltage range and PWM frequency before substitution.
