STMicroelectronics LED2472GBTR

Overview

LED2472GBTR from STMicroelectronics is a 24-channel constant-current RGB LED driver IC with integrated open/short LED fault detection, 7-bit global gain control across two current ranges (4–72 mA), 20 V output capability, and 30 MHz serial interface. It operates from 3 V to 5.5 V and supports gradual output delay for inrush current reduction-designed specifically for full-color indoor/outdoor LED billboards requiring precise per-color current regulation.

For engineers reviewing the LED2472GBTR datasheet, LED2472GBTR pinout, LED2472GBTR application, or LED2472GBTR equivalent, key selection criteria include RGB group partitioning (8×3), programmable short-detection thresholds, thermal shutdown at 170 °C, auto power-saving mode, and TQFP48-EP package compatibility with high-density LED panel layouts.

Technical Context

The LED2472GBTR implements a monolithic 24-bit shift register with three independent 8-channel output banks (R/G/B), each configurable via a shared 24-bit configuration register and separate 7-bit gain register. Current regulation uses an external ISET resistor and dual-range 6-bit per-color resolution (64 steps per range), enabling fine-grained brightness matching across color channels.

Its error detection logic monitors all 24 outputs simultaneously for open-circuit (≤0.5 mA), short-to-rail, and short-to-GND conditions using programmable voltage thresholds (2.0 V or 3.0 V). Thermal management includes a dedicated thermal flag at 150 °C and automatic output shutdown at 170 °C with 15–20 °C hysteresis.

Key Specifications

Pinout & Package

TQFP48-EP (exposed pad), 7 mm × 7 mm, 0.5 mm pitch. Exposed thermal pad must be soldered to PCB ground plane for optimal thermal performance (R_thJA = 33 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RGB LED driver applications.

Compared with TLC5947 and IS31FL3731, LED2472GBTR uniquely combines per-group current tuning, hardware-level open/short diagnosis, and 20 V compliance in a single TQFP48 package - making it the only option that meets full diagnostic and thermal safety requirements for outdoor LED signage without external support circuitry.

Availability

LED2472GBTR is available at Aetrix Electronics and suitable for indoor LED video walls, outdoor digital billboards, transportation signage, and architectural LED facades requiring stable component supply, long-term lifecycle assurance, and automotive-grade thermal robustness.

Supply support for LED2472GBTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.

The LED2472G product line targets high-reliability LED display systems, emphasizing integrated diagnostics, thermal resilience, and scalable multi-device architectures for commercial signage applications.

FAQ

What is the maximum number of LED2472GBTR devices that can be daisy-chained?

Up to 16 devices can be cascaded using the SDI/SDO interface, limited by cumulative propagation delay (t_PLH/t_PHL ≤25 ns per stage) and CLK rise/fall time constraints (<5 µs). At 30 MHz, practical chaining is 8–12 devices for full 24-bit data integrity without added timing margin.

How does the gradual output delay reduce inrush current?

The gradual delay staggers turn-on timing across the first four RED outputs (R1–R4) with 10 ns inter-channel spacing. This spreads the initial capacitive charging current over ~30 ns instead of instantaneous, lowering peak supply current by up to 42% - critical for minimizing voltage droop on shared 5 V rails.

Can the LED2472GBTR drive LEDs with forward voltages exceeding 15 V?

Yes - its 20 V output compliance rating supports up to six standard white LEDs (3.2 V each) or eight red LEDs (2.1 V each) in series per channel. Dropout voltage remains <1.2 V at 61 mA, ensuring stable current regulation even near the 20 V limit.

What happens during thermal shutdown, and how is recovery handled?

At 170 °C junction temperature, all 24 outputs disable immediately and the thermal flag remains asserted. Recovery requires junction cooling below 155 °C (15 °C hysteresis); no reset or reconfiguration is needed - outputs resume normal operation automatically once thermal conditions stabilize.