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TLC5940RHBR

TITLC5940RHBR

Texas Instruments
LED Driver IC 16 Output Linear Shift Register Dimming 120mA 32-VQFN (5x5)
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Overview

The TLC5940RHBR is a 16-channel, constant-current sink LED driver designed for high-precision lighting applications. It features 12-bit (4096 steps) PWM grayscale control for every channel and 6-bit (64 steps) dot correction for individual brightness matching, all managed via a 30 MHz serial interface. The device supports an output voltage up to 17V and includes integrated EEPROM to store dot correction values.

Why Choose This Part

The IC provides exceptional brightness granularity with its 4096-step PWM and helps simplify system calibration by storing dot correction factors in internal EEPROM. It also includes robust diagnostic features like LED Open Detection (LOD) and a Thermal Error Flag (TEF) to monitor system health in real-time.

Applications

LCD Backlighting
Precise PWM control allows for uniform backlighting and local dimming in high-end displays.
Full-Color LED Signage
Utilizes 12-bit PWM and dot correction to ensure color consistency across large-scale video walls and message boards.
Industrial Illumination
Ideal for status indicators and control panel lighting where consistent brightness across multiple LEDs is required.

Key Specifications

Type Linear
Topology Shift Register
Frequency 30MHz
Applications Backlight
Mounting Type Surface Mount
Package / Case 32-VFQFN Exposed Pad
Voltage - Output 17V
Number of Outputs 16
Internal Switch(s) Yes
Operating Temperature -40degC ~ 85degC (TA)
Voltage - Supply (Max) 5.5V
Voltage - Supply (Min) 3V
Supplier Device Package 32-VQFN (5x5)
Current - Output / Channel 120mA

Getting Started

To evaluate this part, look for the TLC5940EVM evaluation module or use an Arduino-compatible library to drive the serial interface. Ensure the IREF resistor is properly calculated to set the maximum desired sink current (up to 120mA) and provide adequate thermal dissipation through the VQFN exposed pad.

TLC5940 Family

Part NumberDifferenceStock
TLC5940PWPR PWPR 2,665

Also Consider

PCA9685 NXP Semiconductors - An I2C-based alternative with 12-bit resolution, better suited for systems where an I2C bus is preferred over high-speed serial data.