Diodes Incorporated AL1783T16E-13

Overview

AL1783T16E-13 from Diodes Incorporated is a three-channel linear LED driver IC with independent PWM dimming and external reference-based current setting per channel, supporting up to 60V input/LED voltage, ±4% current tolerance at 125mA, and operation from −40°C to +105°C ambient. It targets RGB, horticulture, architectural, and industrial LED lighting systems requiring precise multi-channel current control and flicker-free dimming.

For engineers reviewing the AL1783T16E-13 datasheet, AL1783T16E-13 pinout, AL1783T16E-13 application, or AL1783T16E-13 equivalent, key selection criteria include per-channel PWM enable timing (10μs min ON time), fault reporting via open-drain FAULTB, thermal foldback/shutdown thresholds (160°C/140°C), UVLO hysteresis (300mV), and RREF-based current scaling (30–250mA per channel).

Technical Context

The AL1783 implements three independent linear current-sink regulators, each with dedicated PWM input (internally pulled down 200kΩ), reference pin (REF1–REF3), and LED cathode output (LED1–LED3). Its pre-regulator stage enables stable operation across 6.5–60V VIN while maintaining low quiescent current (1.5mA normal mode, 200μA standby).

Protection logic includes cycle-counted LED open/short detection (7 cycles, 3ms deglitch), hiccup-mode recovery (128ms interval), and thermal management with foldback, shutdown (160°C), and automatic recovery (140°C). Fault status is reported synchronously on a shared open-drain FAULTB pin.

Key Specifications

Pinout & Package

TSSOP-16EP (Type DX) package with exposed thermal pad (EP) requiring PCB connection to GND for optimal thermal performance (θJA = 45°C/W, θJC = 10°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar three-channel linear LED driver applications.

Compared with AL1782T16E-13, the AL1783T16E-13 adds full RGB capability and fault bus scalability; versus AL8863W6-7, it trades efficiency for zero-EMI operation, deterministic dimming latency, and simplified BOM-critical for flicker-sensitive and space-constrained lighting designs.

Availability

AL1783T16E-13 is available at Aetrix Electronics and suitable for RGB lighting, horticulture lighting, and architectural lighting requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for AL1783T16E-13 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q standards.

The AL1783 belongs to Diodes' linear LED driver product line, designed specifically for high-accuracy, multi-channel constant-current regulation in commercial and industrial connected lighting systems where EMI-free operation and design simplicity are prioritized over switching efficiency.

FAQ

What is the minimum PWM pulse width supported by AL1783T16E-13?

The AL1783T16E-13 supports a minimum PWM ON time of 10μs, enabling deep dimming down to 1% duty cycle at 1kHz. This specification is guaranteed across −40°C to +105°C ambient and ensures flicker-free operation in video recording and high-speed inspection applications.

How does the AL1783T16E-13 handle thermal overload?

Under thermal stress, the AL1783T16E-13 first applies thermal foldback to reduce output current gradually above 140°C junction temperature. If temperature reaches 160°C, it shuts down completely and holds FAULTB low. Automatic recovery occurs only after junction temperature drops below 140°C, verified over 128ms intervals.

Can multiple AL1783T16E-13 devices share a single FAULTB line?

Yes-the FAULTB pin is open-drain and rated for 1mA sink current. Multiple AL1783T16E-13 ICs can connect their FAULTB pins together with one external pull-up resistor to a common MCU interrupt line, enabling centralized fault monitoring without additional GPIO resources.

What is the impact of using different RREF values across channels?

Each REF pin (REF1–REF3) sets its corresponding LED channel current independently via ILED = 4000 × VREF / RREF. Using mismatched RREF values (e.g., 24kΩ, 48kΩ, 100kΩ) yields 250mA, 125mA, and 60mA per channel respectively-enabling asymmetric current profiles for color balance or lumen tuning without external current mirrors.