Texas Instruments TLC59282RGER

Overview

TLC59282RGER from Texas Instruments is a 16-channel constant-current LED sink driver in a 24-pin QFN package, supporting up to 45 mA per channel (VCC ≥ 3.6 V), 17 V LED supply voltage, and 35 MHz serial data rate. It implements four-grouped 20 ns output delay for EMI reduction and is used in high-density video displays and message boards requiring precise current matching.

For engineers reviewing the TLC59282RGER datasheet, TLC59282RGER pinout, TLC59282RGER application, or TLC59282RGER equivalent, key selection criteria include channel-to-channel current accuracy (±0.6% typ), BLANK pulse width (30 ns), thermal performance (θJA = 46.8°C/W), and daisy-chain capability via SIN/SOUT interface.

Technical Context

The TLC59282RGER integrates a 16-bit shift register and output latch controlled by SIN, SCLK, and LAT signals, with Schmitt-trigger inputs compatible with 3.3 V or 5 V logic. Data is latched on LAT rising edge and transferred to 16 constant-current sinks.

Its four-grouped output delay (OUT0/7/8/15 → OUT1/6/9/14 → OUT2/5/10/13 → OUT3/4/11/12) reduces simultaneous switching noise. Current magnitude is set by a single external resistor (RIREF) connected between IREF and GND, yielding 2–45 mA range depending on VCC and RIREF value.

Key Specifications

Pinout & Package

Package: 24-pin VQFN (RGE), 4 mm × 4 mm, 0.5 mm pitch, exposed thermal pad (internally unconnected; must be soldered to PCB GND plane for thermal performance).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59281RGER, the TLC59282RGER adds four-grouped delay for EMI suppression but shares identical pinout, current range, and serial protocol. Against MAX7219CWG+, it offers double channel count and external current tuning at the cost of no native SPI or on-chip decoding.

Availability

TLC59282RGER is available at Aetrix Electronics and suitable for video displays, message boards, and architectural illumination requiring stable component supply, consistent current matching, and industrial temperature operation.

Supply support for TLC59282RGER 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 and embedded processing technologies, with leadership in precision analog, power management, and interface solutions.

The TLC59282 product line delivers high-channel-count, constant-current LED drivers optimized for commercial and industrial signage applications demanding tight current matching, daisy-chain scalability, and robust thermal performance in compact packages.

FAQ

What is the maximum LED supply voltage supported by the TLC59282RGER?

The TLC59282RGER supports an output voltage range of –0.3 V to +18 V at its OUT0–OUT15 terminals. This allows direct connection to LED strings with total forward voltage up to 17 V, such as five 3.4 V white LEDs in series. The absolute maximum rating is 18 V; operation beyond 17 V risks exceeding safe operating area limits under load.

How does the four-grouped delay function in the TLC59282RGER improve system performance?

The TLC59282RGER staggers output switching across four groups (e.g., OUT0/7/8/15 first, then OUT1/6/9/14) with ~20 ns inter-group delay. This reduces peak supply current demand and minimizes simultaneous switching noise, lowering conducted and radiated EMI - critical for video displays complying with CISPR 22/32 standards. The delay is fixed and inherent to the IC's internal timing architecture.

Can the TLC59282RGER be used with both 3.3 V and 5 V microcontrollers?

Yes, the TLC59282RGER features Schmitt-trigger inputs (SIN, SCLK, LAT, BLANK) compatible with both 3.3 V and 5 V CMOS logic levels. Input thresholds scale with VCC: VIH = 0.7 × VCC (min), VIL = 0.3 × VCC (max). When VCC = 3.3 V, it accepts 3.3 V logic directly; when VCC = 5 V, it safely interfaces with 5 V controllers without level shifters.

What is the role of the IREF pin on the TLC59282RGER, and how is current set?

The IREF pin on the TLC59282RGER connects to an external resistor (RIREF) tied to GND, setting the sink current for all 16 channels. Internal reference voltage (VIREF = 1.205 V typ) develops across RIREF, yielding IOUT = 41.9 × (VIREF / RIREF). For example, RIREF = 1.5 kΩ yields ~33.6 mA per channel at VCC ≥ 3.6 V. Values from 2 mA to 45 mA are achievable within specified VCC ranges.

Is thermal pad connection mandatory for the TLC59282RGER in QFN package?

Yes, the exposed thermal pad on the TLC59282RGER (RGE package) is not internally connected to GND but must be soldered to a PCB GND plane. This connection is essential to achieve the published θJA = 46.8°C/W rating. Omitting the thermal pad increases junction temperature by >25°C under full load, risking thermal shutdown or accelerated parametric drift in continuous operation.