Diodes Incorporated AL1666+AL8116+AL5822EV1

Overview

AL1666+AL8116+AL5822EV1 from Diodes Incorporated is an evaluation board for a 0–10V dimmable, single-stage flyback LED driver delivering 1200 mA constant current across 25–50 V output, operating from 90–305 VAC universal input with >0.96 power factor and <5% LED current ripple. It integrates AL1666 (primary-side controller), AL8116 (secondary-side dimming interface), and AL5822 (current ripple suppressor) for commercial/industrial LED lighting systems requiring deep dimming to 1% and robust protection.

For engineers reviewing the AL1666+AL8116+AL5822EV1 datasheet, AL1666+AL8116+AL5822EV1 pinout, AL1666+AL8116+AL5822EV1 application, or AL1666+AL8116+AL5822EV1 equivalent, this board serves as a validated reference design for high-PF, low-THD, 0–10V analog dimming LED drivers targeting architectural, industrial, and outdoor lighting applications where EMI compliance (EN55022 Class B with margin), thermal reliability, and startup time (<500 ms) are critical.

Technical Context

This evaluation board implements a primary-side regulated, single-stage flyback topology using AL1666's quasi-resonant control with valley switching, enabling high efficiency (up to 89%) and tight constant-current regulation (±2% line/load). The AL8116 provides isolated 0–10V dimming signal conditioning and feedback scaling, while AL5822 actively suppresses 100/120 Hz LED current ripple to <5% peak-to-peak.

Protection architecture includes LED open (63 V OVP), LED short, primary/secondary winding shorts, secondary diode short, overtemperature, and comprehensive EMI filtering meeting EN55022 with ≥4.7 dB margin at 230 VAC. Input rectification uses GBU406 bridge; power switch is Infineon IPA80R1KOC (800 V, 1 Ω R_DS(on)); output rectifier is SBR10U300CT (300 V, 10 A).

Key Specifications

Availability

AL1666+AL8116+AL5822EV1 is available at Aetrix Electronics and suitable for architectural lighting, industrial high-bay fixtures, and outdoor area lighting requiring stable component supply, rapid prototyping validation, and pre-verified EMI performance.

Supply support for AL1666+AL8116+AL5822EV1 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 manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and lighting applications.

The AL1666+AL8116+AL5822EV1 belongs to Diodes' LED driver evaluation platform family, designed to accelerate development of high-efficiency, standards-compliant, dimmable AC/DC LED drivers for commercial and industrial lighting markets.

FAQ

What is the purpose of the AL1666+AL8116+AL5822EV1 evaluation board?

This board is a fully assembled, tested reference design for a 0–10V dimmable, single-stage flyback LED driver delivering 1200 mA at 25–50 V output from 90–305 VAC input. It demonstrates integrated operation of AL1666 (primary controller), AL8116 (dimming interface), and AL5822 (ripple suppressor), including schematics, BOM, layout, and measured performance data for immediate system-level validation.

Does the board support both 120 VAC and 230 VAC inputs?

Yes - the board operates across 90–305 VAC universal input without hardware modification. Measured performance shows power factor >0.96 and THD <10% at both 120 VAC and 230 VAC full load, with efficiency peaking at 89% at 230 VAC/50 V/1.2 A and maintaining ≥87% across the full input range.

How is 0–10V dimming implemented and verified?

Dimming is implemented via AL8116, which isolates and conditions the external 0–10V analog signal, then scales feedback to AL1666. Verified dimming curves show linear LED current response from 1200 mA at 10 V down to 12 mA at 0.1 V (1%), with full light-off below 0.1 V. Startup time remains <500 ms across dimming levels.

What protection features are included and how are they triggered?

The board includes LED open (63 V OVP), LED short, primary/secondary winding short, secondary diode short, and overtemperature protection. LED open triggers within 100 ms, clamping output voltage at 63 V; LED short limits current to safe level and recovers automatically; winding shorts disable switching within 20 µs; thermal shutdown activates at IC junction temperature >150 °C.