Diodes Incorporated AL5890-10D-13

Overview

AL5890-10D-13 from Diodes Incorporated is a 400V linear constant-current LED driver in TO252 (Standard) package, delivering precisely 10mA ±1.0mA (typ.) output current with thermal foldback protection and 7V minimum turn-on voltage. It supports both high-side and low-side LED string configurations for commercial lighting, signage, and emergency fixtures operating up to 400V DC input.

For engineers reviewing the AL5890-10D-13 datasheet, AL5890-10D-13 pinout, AL5890-10D-13 application, or AL5890-10D-13 equivalent, this page provides verified electrical parameters, thermal performance data, TO252 package layout guidance, and real-world implementation constraints for LED current regulation in AC/DC lighting systems.

Technical Context

The AL5890-10D-13 implements a bandgap-referenced linear regulator architecture with internal voltage reference and current-sense feedback loop, enabling stable 10mA output across -40°C to +105°C ambient temperature. Its thermal foldback activates at +130°C junction temperature to linearly reduce output current and prevent thermal runaway.

It operates as a two-terminal series-connected device with no external resistor required-current is factory-trimmed and fixed at 10mA. The IN-to-OUT voltage range spans 7V to 400V DC, and it exhibits ≤1.5% line regulation over 20–60V input while maintaining <±2.0mA total current tolerance across full voltage and temperature range.

Key Specifications

Pinout & Package

AL5890-10D-13 uses the TO252 (Standard) thermally enhanced surface-mount package with exposed thermal pad. Pin 1 is IN (LED current input), Pin 2 is OUT (LED current output), and Pin 3 is NC (not connected). The exposed pad is electrically isolated and intended for thermal conduction only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL5809-10D-13 and NSI45015T1R2G, the AL5890-10D-13 uniquely supports 400V operation in a thermally capable TO252 package-making it the only viable option for direct AC-mains-driven commercial lighting where high-voltage string length and thermal reliability are mandatory.

Availability

AL5890-10D-13 is available at Aetrix Electronics and suitable for commercial LED lighting fixtures, emergency lighting systems, and architectural signage requiring stable component supply with full traceability and lifecycle continuity.

Supply support for AL5890-10D-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and lighting solutions for industrial and consumer markets.

The AL5890 product line delivers cost-effective, resistorless constant-current LED drivers optimized for AC-mains-powered lighting applications-designed to simplify thermal design and eliminate trimming resistors in high-voltage LED string topologies.

FAQ

What is the maximum continuous power dissipation for AL5890-10D-13 in TO252 package?

The AL5890-10D-13 supports 3.85W maximum power dissipation at TA = +25°C when mounted on a 50.8mm × 50.8mm GETEK PCB with 25.4mm × 25.4mm 2oz copper pad. Derating is required above +25°C ambient per the 26.12°C/W θJA value-e.g., at +70°C ambient, max dissipation drops to ~2.2W.

Can AL5890-10D-13 be used in AC-coupled LED circuits?

Yes-AL5890-10D-13 supports AC configuration via external bridge rectifier. The device requires ≥7V DC differential between IN and OUT to turn on, so peak AC input must exceed this threshold after rectification and filtering. It does not include internal rectification or zero-crossing detection.

Does AL5890-10D-13 require an external heatsink?

No external heatsink is required for typical operation up to 2.5W dissipation at +70°C ambient, given the TO252 package's 26.12°C/W θJA on standard 2oz copper. For >2.5W or >+70°C ambient, increasing copper area or adding thermal vias is recommended instead of discrete heatsinks.

How does thermal foldback behave during sustained overtemperature conditions?

When junction temperature exceeds +130°C, AL5890-10D-13 linearly reduces output current to limit power dissipation-e.g., at +140°C, current drops to ~7mA. This self-limiting behavior maintains safe operation without shutdown, allowing recovery once temperature falls below +130°C.