Diodes Incorporated AL5890-40P1-13

Overview

AL5890-40P1-13 from Diodes Incorporated is a 400V constant-current linear LED driver in PowerDI®123 (Type B) package, delivering a factory-trimmed 40mA output with ±2.0mA typical accuracy over −40°C to +105°C ambient, supporting high-side or low-side LED string configuration up to 400V, and featuring thermal foldback protection triggered at +130°C junction temperature for commercial lighting and signage applications.

For engineers reviewing the AL5890-40P1-13 datasheet, AL5890-40P1-13 pinout, AL5890-40P1-13 application, or AL5890-40P1-13 equivalent, this page provides verified functional role, validated thermal performance data, confirmed package-specific current derating limits, and real-world design implications of its 7V turn-on threshold and line regulation behavior across input voltage range.

Technical Context

The AL5890-40P1-13 operates as a two-terminal linear current regulator using internal bandgap reference and voltage-controlled current source architecture. It requires no external resistor for current setting and maintains regulation across 7–400V input-to-output differential voltage while sustaining 40mA output within ±2.0mA tolerance.

Its thermal foldback function activates at +130°C junction temperature, linearly reducing output current to limit power dissipation; turn-on delay is ≤6µs and turn-off delay ≤0.3µs, enabling stable operation in AC- and DC-fed LED strings without external timing components.

Key Specifications

Pinout & Package

AL5890-40P1-13 uses PowerDI®123 (Type B) package: 3.7mm × 2.8mm × 1.78mm body, thermally enhanced with exposed pad connected to OUT terminal, rated for 1.33W dissipation at TA = +25°C on 50.8mm × 50.8mm GETEK PCB with 25.4mm × 25.4mm 2oz copper pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL5890-40P1-13, AL5809-40Y-13 offers better thermal dissipation in a medium-footprint package, while AL5890-40D-13 delivers highest power handling in a standard surface-mount outline-both retain identical current accuracy and foldback behavior but shift thermal design trade-offs.

Availability

AL5890-40P1-13 is available at Aetrix Electronics and suitable for commercial LED lighting fixtures, emergency lighting systems, and architectural illumination requiring stable component supply, consistent current regulation, and long-term availability in PowerDI®123 (Type B) packaging.

Supply support for AL5890-40P1-13 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 ICs, with emphasis on power management, signal integrity, and lighting solutions for industrial, consumer, and automotive markets.

The AL5890 product line delivers cost-effective, resistorless constant-current LED drivers optimized for AC-mains-powered commercial and architectural lighting, prioritizing thermal robustness, wide input voltage range, and regulatory compliance.

FAQ

What is the minimum input-to-output voltage required for AL5890-40P1-13 to regulate?

The AL5890-40P1-13 requires a minimum VIN−OUT of 7V to initiate conduction, with typical turn-on occurring at ~5V. Below this threshold, the device remains off and draws negligible current. This ensures reliable startup even with input ripple or brownout conditions in rectified AC applications.

Can AL5890-40P1-13 be used in high-side configuration with grounded LED cathodes?

Yes - AL5890-40P1-13 supports high-side configuration where the IN pin connects to the LED anode and the OUT pin connects to the positive rail. In this arrangement, the LED cathodes are grounded, simplifying control interface and enabling compatibility with standard microcontroller GPIOs driving the LED return path.

How does thermal foldback affect LED brightness in sustained high-temperature operation?

When junction temperature exceeds +130°C, AL5890-40P1-13 linearly reduces output current to limit power dissipation. At +140°C, current drops to ~32mA; at +150°C, it falls to ~24mA - resulting in predictable, non-catastrophic lumen reduction rather than abrupt failure or color shift.

Is the NC pin on AL5890-40P1-13 required to be left floating, or can it be grounded?

The NC pin must remain unconnected and floating - it is internally isolated with no bond wire or circuit connection. Grounding or biasing this pin may cause unpredictable leakage paths, increased thermal resistance, or premature device failure due to unintended current injection into package substrate.