The TLC5947RHBR from Texas Instruments is a highly versatile 24-channel, 12-bit PWM LED driver designed to enable the creation of intricate lighting effects in a wide array of applications. This driver is capable of directly driving 24 individual LED channels with a constant current sink, which not only simplifies the design but also ensures consistent brightness and color for each LED in the array.

Key Features and Benefits

• High Precision: With 12-bit (4096 steps) PWM control per channel, the TLC5947RHBR provides smooth and fine dimming resolution, making it ideal for applications that require precise lighting control such as architectural lighting, display backlighting, and LED signage.
• Constant Current Sink: Each of the 24 output channels can provide a constant current sink from 0 mA to 30 mA (up to 60 mA with external resistors), allowing for uniform brightness across all connected LEDs without the need for external resistors.
• Flexible Control: The device can be controlled via a simple serial interface, which allows for easy connection to a microcontroller or other control hardware. The serial interface also supports cascading of multiple TLC5947RHBR devices for applications requiring additional channels.
• Thermal Shutdown: Built-in thermal shutdown protection ensures the longevity and reliability of the driver by preventing overheating.
• Dot Correction: The TLC5947RHBR features 6-bit (64 steps) dot correction to compensate for variations in LED forward voltage and ensure consistent color and brightness among different LEDs.

Applications

The TLC5947RHBR is suitable for a diverse range of applications, including:

• LED video displays
• Architectural lighting
• Channel letter lighting
• Commercial and industrial lighting
• Automotive lighting systems

Package and Quality

The device is offered in a compact QFN package designated as RHBR, which is optimized for heat dissipation and space-constrained applications. Texas Instruments' commitment to quality ensures that the TLC5947RHBR meets the stringent requirements of the industrial and automotive industries, providing reliable performance in a variety of operating conditions.