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Product Detailed Parameters
- Description：IC LED DRVR LIN I2C 42MA 48QFN
- Series：-
- Mfr：Lumissil Microsystems
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Linear
- Topology：Constant Current
- Internal Switch(s)：Yes
- Number of Outputs：16
- Voltage - Supply (Min)：2.7V
- Voltage - Supply (Max)：5.5V
- Voltage - Output：-
- Current - Output / Channel：42mA
- Frequency：1MHz
- Dimming：I2C, PWM
- Applications：General Purpose
- Operating Temperature：-40°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：48-WFQFN Exposed Pad
- Supplier Device Package：48-QFN (6x6)
- Grade：-
- Qualification：-
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Overview
The IS31FL3733B-QFLS4-TR is a linear constant current LED driver IC designed for 12x16 dot matrix displays. It features 16 output channels with an individual auto-breath function and supports I²C and PWM dimming. The device operates on a 2.7V to 5.5V supply, delivers up to 42mA per channel, and utilizes a 48-QFN (6x6mm) package.
Feature Summary
- Integrates individual auto-breath functionality for dynamic visual effects without external microcontroller intervention.
- Supports dual dimming methods via I²C interface and PWM signals for flexible control schemes.
- Provides linear constant current regulation across multiple output channels for uniform LED brightness.
Applications
- 12x16 Dot Matrix LED Displays
- General Purpose LED Signaling
- Consumer Electronics Indicators
Procurement Notes
Verify the specific suffix QFLS4-TR confirms the tape-and-reel packaging format and the 48-QFN (6x6mm) footprint. Ensure the component grade matches system requirements, as automotive variants may carry distinct suffixes or qualification standards. Confirm manufacturer designation is Lumissil Microsystems for accurate sourcing.
Selection Notes
Select this component when a compact solution for small dot matrix arrays is required. It is suitable for designs needing integrated breath effects and low pin-count control via I²C. Consider the 42mA output capability against total LED forward current requirements and thermal dissipation limits within the QFN package.
Part Context
This part belongs to the IS31FL3733 series of LED display drivers from Lumissil Microsystems. It is a successor or variant to earlier ISSI versions, maintaining compatibility in function while potentially differing in manufacturing origin or minor electrical specifications. The series targets cost-sensitive matrix applications requiring efficient drive capabilities.
Replacement Considerations
Direct substitutes include the IS31FL3733-QFLS4-TR and IS31FL3733-TQLS4. Verify pinout and electrical parameters before substitution, as package differences (QFN vs TQFP) require PCB layout adjustments.
FAQ
What is the maximum output current per channel?
The maximum output current per channel is 42mA.
Does the device support hardware dimming?
Yes, it supports both I²C digital dimming and PWM analog dimming.
