Texas Instruments TLC6C5724QDAPRQ1

Overview

TLC6C5724QDAPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive 24-channel constant-current RGB LED driver with full diagnostics, supporting 50-mA per channel sink current, 8-V output voltage headroom, and integrated 12-/10-/8-bit PWM grayscale control for precise color and brightness management in cluster and ambient lighting systems.

For engineers reviewing the TLC6C5724QDAPRQ1 datasheet, TLC6C5724QDAPRQ1 pinout, TLC6C5724QDAPRQ1 application, or TLC6C5724QDAPRQ1 equivalent, key selection considerations include its triple-group (R/G/B) 8-channel output architecture, IREF-based current calibration, LED-open/short and adjacent-pin fault detection, and HTSSOP-38 thermal-pad package for automotive thermal reliability.

Technical Context

The TLC6C5724QDAPRQ1 implements a serial-shift-register interface with SDI/SDO daisy-chaining, synchronized by SCK and controlled via LATCH and GCLK; it uses a shared 3-pin GCLK input to drive a programmable grayscale PWM counter across all 24 channels. Its diagnostic engine continuously monitors LED open/short, IREF resistor integrity, pre-thermal warning (125–145°C), and thermal shutdown (150–170°C).

Each of the three output groups (OUTR0–7, OUTG0–7, OUTB0–7) supports independent 8-bit intensity control, while individual channels feature 7-bit dot correction with dual-range adjustment; output slew rate is configurable (fast/slow) to suppress EMI, and group-delay timing prevents simultaneous switching surges between R/G/B banks.

Key Specifications

Pinout & Package

Package: HTSSOP-38 with exposed thermal pad (6.20 mm × 12.50 mm); requires PCB thermal pad connection to ground plane for junction-to-board thermal resistance of 18 °C/W and reliable operation at 125°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX20051ATP/V+T and TPS61196RTVR, the TLC6C5724QDAPRQ1 uniquely delivers 24-channel RGB grouping with full hardware diagnostics-including adjacent-pin short detection and LOD_LSD self-test-enabling ASIL-B–compliant cluster and local-dimming systems without host MCU supervision.

Availability

TLC6C5724QDAPRQ1 is available at Aetrix Electronics and suitable for automotive cluster displays, local dimming backlighting, and interior ambient lighting requiring stable component supply across extended production lifecycles.

Supply support for TLC6C5724QDAPRQ1 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive ICs, with decades of automotive qualification expertise and AEC-Q100 leadership.

The TLC6C5724QDAPRQ1 belongs to TI's automotive LED driver product line, engineered specifically for high-reliability RGB backlighting and indicator systems in instrument clusters, center stacks, and ambient lighting modules.

FAQ

What is the maximum output voltage compliance of the TLC6C5724QDAPRQ1?

The TLC6C5724QDAPRQ1 supports up to 8 V output voltage headroom across all 24 constant-current sink channels. This allows direct driving of RGB LED strings with combined forward voltages up to 8 V - sufficient for typical automotive InGaN blue/green and AlInGaP red LEDs operating across –40°C to +125°C ambient conditions - without requiring external boost circuitry.

How does the TLC6C5724QDAPRQ1 implement LED open-circuit detection?

The TLC6C5724QDAPRQ1 performs LED open-circuit detection by monitoring the SENSE pin voltage during active output periods. When an LED opens, the channel's output voltage rises toward VSENSE; the device compares this against programmable thresholds (VLOD1 = 0.3 V, VLOD2 = 0.5 V) and asserts the ERR pin while setting the LOD_LSD flag. Detection is performed per-channel and validated via the LOD_LSD self-test circuit.

Can multiple TLC6C5724QDAPRQ1 devices be cascaded, and how is data synchronized?

Yes, multiple TLC6C5724QDAPRQ1 devices can be daisy-chained using SDI-to-SDO connections. Data is shifted in synchronously via the shared SCK signal; the LATCH pulse transfers all received bits into output latches simultaneously across the chain. GCLK remains common to all devices, ensuring synchronized PWM timing and frame-aligned dimming across distributed LED zones.

What thermal management features does the TLC6C5724QDAPRQ1 provide?

The TLC6C5724QDAPRQ1 includes pre-thermal warning (trip at 125–145°C, 10°C hysteresis) and thermal shutdown (trip at 150–170°C, 10°C hysteresis), both latched and readable via register. Its HTSSOP-38 package features an exposed thermal pad that must be soldered to a PCB ground plane to achieve RθJB = 18 °C/W - critical for sustaining 50-mA/channel operation at 125°C ambient.

Is the TLC6C5724QDAPRQ1 compatible with standard SPI interfaces?

The TLC6C5724QDAPRQ1 uses a proprietary 288-bit serial interface with SDI/SCK/LATCH/BLANK/GCLK signals - not standard 4-wire SPI. While SCK and SDI resemble SPI clock/data lines, it requires specific timing (e.g., tSU2 = 200 ns setup before LATCH) and command framing (12-bit CMD field). Host firmware must implement TI's protocol, not generic SPI peripheral hardware.