Texas Instruments TLC59283RGET

Overview

TLC59283RGET from Texas Instruments is a 16-channel constant-current LED sink driver with pre-charge FET, CMOS-level serial interface (SIN/SCLK/LAT/BLANK), and single-resistor current setting. It delivers up to 45mA per channel at VCC > 3.6V, supports LED supply up to 10V, and operates from –40°C to +85°C. It targets high-density multiplexed LED video displays requiring ghosting suppression and noise-controlled grouped switching.

For engineers reviewing the TLC59283RGET datasheet, TLC59283RGET pinout, TLC59283RGET application, or TLC59283RGET equivalent, this page provides verified functional identity, validated QFN-24 package mapping, confirmed pre-charge FET operation, channel-to-channel current accuracy (±1.4% typ), and daisy-chain timing compatibility at 35MHz.

Technical Context

The TLC59283RGET implements a 16-bit shift register feeding an output latch, with LAT-triggered data transfer and BLANK-synchronized global output blanking. Its constant-current sink outputs are set by a single external resistor connected to IREF, enabling precise per-device current calibration across VCC = 3V–5.5V.

Each OUT0–OUT15 includes an integrated pre-charge FET activated during BLANK high to discharge parasitic capacitance and suppress ghosting in dynamic LED matrix scanning. Outputs are grouped into nine staggered switching banks (e.g., OUT0 alone; OUT1/OUT15 paired) with ~2ns inter-group delay to limit simultaneous switching current transients.

Key Specifications

Pinout & Package

RGE package: 24-pin QFN (4mm × 4mm, 0.5mm pitch) with exposed thermal pad (must be soldered to GND plane). Pin 1 marked via top-side dot; thermal pad not internally connected - PCB connection required 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 TLC5940RHBR and MAX7219CWG+, the TLC59283RGET uniquely combines 16-channel sink capability, resistor-set current precision, integrated pre-charge FET for ghosting reduction, and grouped switching for EMI control - making it optimal for industrial-grade multiplexed LED signage where reliability and artifact-free operation are mandatory.

Availability

TLC59283RGET is available at Aetrix Electronics and suitable for video displays, outdoor message boards, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLC59283RGET 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 leader specializing in analog, embedded processing, and power management technologies, with decades of experience in LED driver innovation.

The TLC59283RGET belongs to TI's constant-current LED driver product line, engineered specifically for high-reliability, multiplexed LED display systems where ghosting suppression, noise control, and thermal robustness are critical design requirements.

FAQ

What is the maximum LED supply voltage supported by the TLC59283RGET?

The TLC59283RGET supports LED supply voltages up to 10V on its OUTx pins. This allows direct connection to common LED string configurations without external voltage translation, provided the voltage difference between VLED and the OUTx node remains within the device's absolute maximum rating of +11V. The driver itself operates from a separate 3V–5.5V VCC rail.

How does the pre-charge FET in the TLC59283RGET reduce ghosting in multiplexed LED displays?

The pre-charge FET in the TLC59283RGET actively pulls each OUTx node to VCC during BLANK high, discharging parasitic capacitance before the next common-line switch. This prevents unintended current flow through adjacent LEDs when row drivers change state - eliminating the "ghost" illumination effect observed in high-speed scanned LED matrices. The FET's 3–6kΩ on-resistance ensures fast, controlled discharge without excessive current draw.

Can multiple TLC59283RGET devices be cascaded, and what is required for reliable daisy-chaining?

Yes, multiple TLC59283RGET devices can be daisy-chained using the SOUT pin of one device connected to the SIN pin of the next. Reliable operation requires maintaining signal integrity on SIN/SCLK lines - use controlled-impedance routing, minimize stub length, and terminate SCLK if trace length exceeds 10cm. At 35MHz, propagation delays must be accounted for in LAT timing to ensure simultaneous latching across the chain.

What is the role of the IREF pin on the TLC59283RGET, and how is the output current calculated?

The IREF pin on the TLC59283RGET connects to an external resistor (RIREF) tied to GND, setting the sink current for all 16 channels. The current is calculated as IOUT ≈ 43.8 × (1.208V / RIREF), yielding 35mA with a 1.51kΩ resistor at VCC > 3.6V. This single-resistor method ensures matched current across channels and simplifies BOM and layout versus per-channel calibration.

Does the TLC59283RGET require external pull-up or pull-down resistors on its control pins?

The TLC59283RGET includes internal pull-down on LAT (500kΩ) and internal pull-up on BLANK (500kΩ), eliminating the need for external biasing under normal operation. SIN and SCLK have Schmitt-trigger inputs but no internal terminations - external pull-downs (e.g., 10kΩ) are recommended on SIN when unused to prevent floating-state noise coupling, especially in noisy industrial environments.