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Product Detailed Parameters
- Description：4 LED CURRENT SINK LED DRIVER PR
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Constant Current
- Internal Switch(s)：Yes
- Number of Outputs：4
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：40mA
- Frequency：1MHz
- Dimming：I2C, PWM
- Applications：General Purpose
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：12-UFQFN
- Supplier Device Package：12-UTQFN (2x2)
- Grade：-
- Qualification：-
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Overview
The IS31FL3294-UTLS4-TR is a linear constant current LED driver IC manufactured by Lumissil Microsystems. It features four independent output channels, each capable of sourcing up to 40mA. The device operates on a supply voltage range of 2.7V to 5.5V and supports dimming via I²C and PWM interfaces. It utilizes a compact 12-UTQFN (2x2mm) surface-mount package and functions within an operating temperature range of -40°C to +125°C.
Feature Summary
- Four-channel linear constant current sink architecture for precise LED control
- Integrated I²C compatible interface for digital configuration and dimming
- Supports PWM dimming for brightness adjustment
- Compact 2mm x 2mm UTQFN package design
Applications
- General purpose LED lighting applications
- Backlighting systems requiring small form factor drivers
- Portable electronic devices with limited board space
- Indicator light arrays in consumer electronics
Procurement Notes
Verify the specific suffix LS4 against the manufacturer's latest datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the 12-UTQFN footprint aligns with your PCB layout guidelines. Confirm active status and availability through authorized distributors, as supply chain conditions may vary.
Selection Notes
Select this component when a low-profile, multi-channel linear driver is required for high-density designs. It is suitable for applications where the voltage drop across the LEDs allows for linear regulation without excessive heat dissipation. Consider the 40mA per channel limit and the 2.7V-5.5V supply range during circuit planning.
Part Context
This part belongs to the IS31FL32xx series of LED lighting drivers from Lumissil Microsystems. These components are designed for industrial and general-purpose applications, offering integrated control interfaces to reduce external component count. The series emphasizes compact packaging solutions like the UTQFN format for modern miniaturized electronics.
Replacement Considerations
Check for direct substitutes within the IS31FL32xx family that offer similar channel counts and package types. Verify compatibility of the I²C address and register map if replacing with other Lumissil parts. Cross-reference with other manufacturers' 4-channel linear LED drivers only if pinouts and electrical specs are identical.
FAQ
What is the maximum output current per channel?
Each of the four output channels can source a maximum constant current of 40mA.
Does the IS31FL3294 support analog dimming?
No, it supports digital dimming via I²C and pulse-width modulation (PWM).
What is the operating supply voltage range?
The device operates with a supply voltage between 2.7V and 5.5V.
