LED2472GBTR

Overview

The LED2472GBTR is a monolithic, low-voltage linear LED driver IC manufactured by STMicroelectronics. It features 24 constant-current output channels organized into three groups of eight independently controlled channels for red, green, and blue applications. The device supports an output current range from 4 mA to 72 mA per channel, adjustable via a single external resistor with 6-bit resolution. It operates on a supply voltage between 3 V and 5.5 V, delivering up to 19 V output capability to drive series-connected LEDs. The internal shift register supports clock frequencies up to 30 MHz, facilitating high data rate transmission.

Feature Summary

• Provides 24 constant-current sink channels configured in three independent RGB groups for precise color control.
• Integrates comprehensive error detection circuits capable of identifying open channels, short-to-ground, and short-to-supply conditions.
• Includes thermal management features such as overtemperature flagging and automatic thermal shutdown at 170 °C.
• Supports selectable auto power-saving modes and gradual output delay to reduce inrush current during operation.

Applications

• Indoor and outdoor LED screen billboards
• Large-area display panels
• Full-color board panels requiring high RGB resolution

Procurement Notes

Verify the component status carefully, as official documentation indicates this part number may be subject to end-of-life or discontinuation notices. Confirm the specific package variant matches the required 48-TQFP-EP form factor. Ensure that the design accounts for the serial interface requirements and external resistor selection for the desired current range. Cross-reference the latest datasheet revision to confirm pinout compatibility and electrical specifications before finalizing procurement.

Selection Notes

Select this driver when designing systems requiring independent current regulation for multiple LED strings within a single package. It is suitable for applications needing high-speed data transmission via its 30 MHz clock capability. Consider the linear topology and thermal characteristics when planning heat dissipation strategies. The integrated diagnostic features make it appropriate for systems requiring real-time fault detection without additional external monitoring components.

Part Context

The LED2472GBTR belongs to the LED2472G family of LED drivers designed for panel displays. It is typically evaluated using dedicated boards such as the STEVAL-ILL015V2 or STEVAL-ILL015V3, which integrate the driver with STM32 microcontrollers. These evaluation platforms demonstrate the device's capabilities in controlling high-brightness RGB LEDs and testing diagnostic functions like LED disconnection and shorting simulations.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official obsolescence notices or contact technical support for recommended alternatives if this component is discontinued.

FAQ

How is the LED output current regulated?

The LED current is separately regulated for each color group within the 4 mA to 72 mA range. Adjustment is achieved using a single external resistor, allowing for 64 steps of resolution (6 bits) within two sub-ranges.

What diagnostic features are included?

The device includes an LED failure detection circuit that checks for three conditions: short to ground, short to the LED power supply rail, and open channel. It also provides an overtemperature flag and automatic thermal shutdown.