Diodes Incorporated AL8116W6-7

Overview

AL8116W6-7 from Diodes Incorporated is a flexible 0–10V dimming signal interface controller that converts three input types-0–10V DC, 0–100% PWM (0.5–5 kHz), and 0–100 kΩ potentiometer-into a precise open-drain PWM output for LED driver control. It operates from 10V to 56V VCC, delivers ±2.5% output duty cycle accuracy, and supports isolation via opto-coupler in commercial LED luminaires.

For engineers reviewing the AL8116W6-7 datasheet, AL8116W6-7 pinout, AL8116W6-7 application, or AL8116W6-7 equivalent, key selection criteria include its adjustable DIM bias current (30–300 µA), four-step minimum duty clamping (2–8%), integrated over-temperature protection (135°C trip), SOT26 package footprint, and compatibility with primary-side dimmable LED drivers such as AL1665/AL1666.

Technical Context

The AL8116 implements a mixed-signal architecture with an internal 28-step microcontroller, analog-to-digital converter, and dedicated PWM mode detector that auto-identifies input type based on slew rate (>3 V/µs) and voltage thresholds. Its pre-regulator and UVLO circuit enforce stable startup at 7.0 V and shutdown at 6.0 V.

It features dual programmable current sources: one (KDIM = 4) sets DIM pin bias current via RISET (33–330 kΩ), and another (KCLAMP = 0.4) configures minimum output duty via RCLAMP, enabling discrete clamping levels (2%, 4%, 6%, 8%) without external logic.

Key Specifications

Pinout & Package

SOT26 (Type CJ) package: 2.9 mm × 2.8 mm × 1.15 mm body, 0.95 mm pitch, matte tin-plated leads, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dimming interface controller applications.

Compared with AL8117W6-7, AL8116W6-7 removes the EN pin to reduce cost and simplify layout where enable control isn't required; versus LT3799, it avoids PFC complexity and supports three input modes-making it optimal for DC-powered, space-constrained, or legacy-dimmer-compatible LED systems.

Availability

AL8116W6-7 is available at Aetrix Electronics and suitable for commercial LED luminaires, isolated primary-side LED drivers, and potentiometer-based architectural lighting requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AL8116W6-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and lighting solutions with ISO/TS 16949 and IATF 16949 certified facilities.

The AL8116 belongs to Diodes' LED lighting interface product line, designed specifically to simplify dimming interoperability between legacy 0–10 V infrastructure and modern primary-side LED drivers in commercial and architectural lighting.

FAQ

What input types does the AL8116W6-7 support, and how does it detect them?

The AL8116W6-7 supports three dimming inputs: 0–10 V DC, 0.5–5 kHz PWM, and 0–100 kΩ potentiometer. It detects PWM mode automatically when the DIM pin signal exhibits ≥3 V/µs rising slew rate across eight consecutive cycles between 1.2 V and 3.2 V thresholds. DC and potentiometer modes share the same analog path, distinguished by bias current flow and resulting voltage level.

How is the minimum output duty cycle configured, and what resistor values yield each clamping level?

Minimum duty is set via RCLAMP between CLAMP pin and GND. With RISET = 100 kΩ, clamping levels are: 0 Ω → 8%, 150 kΩ → 6%, 300 kΩ → 4%, and >510 kΩ (or open) → no clamping (0%). The internal KCLAMP = 0.4 current mirror ensures predictable VCLAMP vs. RCLAMP relationship: VCLAMP = (2.5 V / RISET) × 0.4 × RCLAMP.

Can the AL8116W6-7 drive an opto-coupler directly, and what are the recommended CTR requirements?

Yes-the open-drain OUT pin sinks up to 20 mA and is designed to drive standard opto-coupler LEDs directly. For reliable switching across temperature, Diodes recommends opto-couplers with CTR ≥ 50% at IF = 5 mA and VCE = 5 V. Slow optos (tR/tF > 5 µs) may require external base access (6-pin type) to avoid duty cycle distortion at 1.5 kHz output frequency.

What is the role of the ISET pin, and how does RISET affect DIM pin bias current?

The ISET pin sets the DIM pin's adjustable current source via RISET to GND. IDIM = (2.5 V / RISET) × KDIM, where KDIM = 4. So RISET = 100 kΩ yields IDIM ≈ 100 µA. This bias current enables compatibility with both active (current-sink) and passive (voltage-source) 0–10 V dimmers, and develops the correct voltage across potentiometers for linear dimming response.