STMicroelectronics LED2472GQTR

Overview

LED2472GQTR 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 voltage rating, and 30 MHz serial interface. It operates from 3 V to 5.5 V and supports gradual output delay for inrush current reduction in large-format indoor/outdoor LED signage.

For engineers reviewing the LED2472GQTR datasheet, LED2472GQTR pinout, LED2472GQTR application, or LED2472GQTR equivalent, key selection criteria include per-color group current programmability (6-bit resolution per channel set), thermal shutdown at 170 °C with flag output, auto power-saving mode timing (75 ns shutdown / 1 µs wakeup), and MLPQ40-EP 5×5 mm package compatibility with high-density LED panel layouts.

Technical Context

The device implements three independent 8-channel groups (R/G/B) with shared 24-bit shift register and single configuration register controlling error detection thresholds, gain range selection (CFG 0–2), auto power management (CFG 6), and gradual delay activation (CFG 8). Each group uses one external ISET resistor to define base current, then applies 7-bit gain scaling in two sub-ranges (low: 4–36 mA, high: 8–72 mA).

Error detection logic monitors all 24 outputs simultaneously for open-circuit (ODC = 0.5 × IOL), short-to-GND, and short-to-VDD conditions using configurable voltage thresholds (SDE1 = 2.0 V, SDE2 = 3.0 V). Thermal management includes dedicated thermal flag (Tflg = 150 °C) and hard shutdown (Tsd = 170 °C) with 15–20 °C hysteresis.

Key Specifications

Pinout & Package

LED2472GQTR uses the MLPQ40-EP 5×5 mm exposed-pad QFN package, optimized for thermal dissipation in high-power LED driving applications. The exposed pad must be soldered to PCB ground for effective junction-to-ambient heat transfer (R_thJA = 25.3 °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, LED2472GQTR uniquely combines 20 V string drive, per-group current tuning, and autonomous open/short detection in a thermally robust MLPQ40 package-making it optimal for outdoor-rated, high-reliability LED video systems where fault resilience and thermal margin are non-negotiable.

Availability

LED2472GQTR is available at Aetrix Electronics and suitable for indoor LED video walls, outdoor digital billboards, and architectural façade lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class B industrial deployments.

Supply support for LED2472GQTR 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 specializing in power management, analog, and automotive-grade ICs, with over 40 years of innovation in industrial and consumer electronics.

The LED2472G belongs to ST's high-reliability LED driver product line, engineered specifically for large-format, high-brightness signage applications demanding robust fault detection, thermal resilience, and scalable channel density.

FAQ

What is the function of the ISET pin and how is current calibrated?

The ISET pin connects to an external resistor (e.g., 13 kΩ) that sets the base current reference for all 24 channels. Current is scaled in two ranges: low (4–36 mA) and high (8–72 mA), each with 6-bit resolution (64 steps). Calibration is factory-trimmed; typical channel-to-channel matching is ±3% at 61 mA, verified per color group under defined test conditions.

How does the LED2472GQTR detect open and shorted LEDs?

It performs real-time monitoring on all 24 outputs using three detection modes: open-circuit (measuring <0.5 × IOL), short-to-GND (voltage < SDE threshold), and short-to-VDD (voltage > 19 V). Thresholds are programmable via CFG 3–5 bits (SDE1 = 2.0 V or SDE2 = 3.0 V), and detection occurs within 1 µs of output activation.

Can multiple LED2472GQTR devices be cascaded, and what is the maximum chain length?

Yes - via SDI-to-SDO daisy-chaining with 30 MHz clock support. Propagation delay from CLK to SDO is ≤25 ns, enabling reliable cascading of ≥100 devices in a single chain. Total latency scales linearly: 24 × N ns for N devices, with LE synchronization maintaining frame alignment across the chain.

What thermal management features does the MLPQ40-EP package provide?

The MLPQ40-EP's exposed thermal pad reduces junction-to-ambient resistance to 25.3 °C/W when soldered to a 4-layer PCB with 1-in² copper pour. Combined with internal thermal flag (150 °C) and shutdown (170 °C), it enables continuous 24-channel operation at 61 mA per channel up to +85 °C ambient - validated per JEDEC 51-7B standards.