Diodes Incorporated AL5890-15P1-13

Overview

AL5890-15P1-13 from Diodes Incorporated is a 400V constant-current linear LED driver in PowerDI®123 (Type B) package, delivering a factory-trimmed 15mA output with ±1.5mA typical accuracy over −40°C to +105°C ambient. It operates as a two-terminal high-side or low-side current regulator for LED strings up to 400V, features thermal foldback activation at +130°C junction temperature, and requires no external current-setting resistor. It is used in commercial LED downlights and emergency lighting where compact, thermally robust, resistorless current regulation is required.

For engineers reviewing the AL5890-15P1-13 datasheet, AL5890-15P1-13 pinout, AL5890-15P1-13 application, or AL5890-15P1-13 equivalent, this page provides verified functional context, validated pin roles, confirmed thermal and electrical specifications, real-world application constraints, and technically documented alternative options - all derived from Diodes' official DS40280 Rev. 3 datasheet.

Technical Context

The AL5890-15P1-13 implements a bandgap-referenced linear current regulator with internal voltage reference and feedback loop, enabling stable 15mA current regulation across input voltages from 7V to 400V. Its turn-on threshold is 7V (min), with typical startup voltage of 5V and maximum V_IN–OUT of 425V absolute rating.

Thermal foldback initiates at +130°C junction temperature, linearly reducing output current to limit power dissipation; it is implemented via self-adaptive control without external components. The device supports both high-side and low-side configurations, with IN and OUT pins serving as bidirectional current path terminals depending on PCB layout.

Key Specifications

Pinout & Package

AL5890-15P1-13 is housed in PowerDI®123 (Type B) - a thermally enhanced surface-mount package with exposed cathode pad for improved heat dissipation. Dimensions: 3.70mm × 2.80mm × 1.78mm (L×W×H), with 2-pin configuration and no internal die attach pad connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL5890-15P1-13, AL5809-15Y-13 offers smaller footprint but reduced thermal headroom, while AL5890-15D-13 delivers superior thermal performance at the cost of larger PCB area - selection depends on system-level thermal budget and mechanical constraints.

Availability

AL5890-15P1-13 is available at Aetrix Electronics and suitable for commercial LED downlights, emergency lighting units, and architectural accent lighting requiring stable component supply, consistent current regulation, and long-term manufacturing continuity.

Supply support for AL5890-15P1-13 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, energy-efficient solutions for power management, signal integrity, and lighting applications.

The AL5890 product line is designed specifically for cost-sensitive, high-voltage LED lighting systems requiring simple, resistorless, thermally protected constant-current regulation - targeting commercial, industrial, and safety-critical illumination markets.

FAQ

What is the minimum input voltage required for AL5890-15P1-13 to regulate current?

The AL5890-15P1-13 requires a minimum voltage difference of 7V between its IN and OUT pins to initiate regulation. This is the absolute minimum turn-on threshold; typical startup occurs at ≈5V. Below this differential, the device remains off and conducts negligible current. Designers must ensure VIN–OUT ≥ 7V under worst-case conditions including LED forward voltage drop and line tolerance.

Can AL5890-15P1-13 be used in high-side and low-side configurations?

Yes - AL5890-15P1-13 supports both high-side and low-side LED driving. In high-side mode, IN connects to the positive rail and OUT connects to the LED anode; in low-side mode, IN connects to the LED cathode and OUT connects to ground. The device regulates current identically in either configuration, with no change to biasing or external components.

How does thermal foldback operate in AL5890-15P1-13?

Thermal foldback activates when the junction temperature reaches +130°C. At that point, the internal reference voltage is linearly reduced, causing output current to decrease proportionally - e.g., at +140°C, current drops ~10% below nominal. This self-limiting behavior prevents thermal runaway without external circuitry and maintains safe power dissipation under sustained overload or poor heatsinking.

Is AL5890-15P1-13 compatible with AC-input LED drivers?

Yes - AL5890-15P1-13 can be used with rectified AC inputs (e.g., bridge rectifier + bulk capacitor). Its 400V operating voltage and 425V absolute maximum rating accommodate 230VAC-derived DC buses (~325V peak). However, designers must verify ripple voltage stays within the 7–400V regulation window and ensure thermal design accounts for RMS current heating under non-DC conditions.