Diodes Incorporated AL5890-30D-13

Overview

AL5890-30D-13 from Diodes Incorporated is a 400V constant-current linear LED driver in TO252 (Standard) package, delivering a factory-trimmed 30mA output with ±2.0mA (typ.) accuracy over −40°C to +105°C ambient. It supports both high-side and low-side LED string configurations, activates at ≥7V IN–OUT differential, and integrates thermal foldback protection triggered at +130°C junction temperature. Used in commercial downlights and architectural lighting where stable current drive across long LED chains is required.

For engineers reviewing the AL5890-30D-13 datasheet, AL5890-30D-13 pinout, AL5890-30D-13 application, or AL5890-30D-13 equivalent, this page provides verified package mapping (TO252), confirmed two-pin topology (IN/OUT), thermal resistance (θJA = 26.12°C/W), line regulation (≤1.5%), and real-world thermal foldback behavior - all critical for LED driver selection in thermally constrained AC/DC lighting designs.

Technical Context

The AL5890-30D-13 implements a bandgap-referenced linear regulator architecture with internal voltage reference and current-sense circuitry, enabling precise constant-current regulation without external resistors. Its functional block includes a voltage regulator stage, precision bandgap reference, and feedback-controlled pass element.

It operates as a two-terminal device with unidirectional current flow (IN → OUT), requiring no control signals or biasing networks. Thermal foldback is implemented via self-adaptive junction-temperature sensing that linearly reduces output current above +130°C, preserving reliability under sustained high-voltage/high-temperature conditions typical in enclosed LED fixtures.

Key Specifications

Pinout & Package

AL5890-30D-13 is housed in TO252 (Standard) package - a thermally enhanced surface-mount outline with exposed pad for heatsinking. The package measures 6.10mm × 6.58mm × 1.59mm (D × E × L) and features a 5.33mm-wide source pad (b3) aligned to JEDEC MO-263 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL5809-30D-13, the AL5890-30D-13 adds critical thermal foldback for reliability in sealed fixtures; compared with NSI50010YT1G, it delivers 4× higher voltage capability and eliminates resistor dependency - making it uniquely suited for direct AC-line LED drivers in commercial lighting.

Availability

AL5890-30D-13 is available at Aetrix Electronics and suitable for commercial downlights, emergency signage, architectural accent lighting, and outdoor decorative fixtures requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for AL5890-30D-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 manufacturer specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the U.S., serving industrial, consumer, and automotive markets.

The AL5890 product line targets cost-sensitive, high-reliability LED lighting applications - engineered for direct AC-line operation, minimal external components, and robust thermal behavior in thermally challenging environments.

FAQ

What is the minimum input voltage required for AL5890-30D-13 to turn on?

The AL5890-30D-13 requires a minimum differential voltage of 7V between its IN and OUT pins to activate. This threshold is confirmed in the Recommended Operating Conditions table (VIN_OUT min = 7V) and validated across temperature in Figure 8 of the datasheet. Below 7V, the device remains in cutoff and delivers zero LED current.

Can AL5890-30D-13 be used in high-side configuration with AC input?

Yes - the AL5890-30D-13 supports high-side AC operation as shown in Figure 15 of the datasheet. When placed between the rectified AC line and the LED anode, it regulates current through the entire LED string. Designers must ensure the IN–OUT voltage remains within −0.3V to +425V and provide adequate creepage/clearance for 277VAC systems.

Does AL5890-30D-13 require an external current-setting resistor?

No - the AL5890-30D-13 has a factory-trimmed 30mA output current. Its internal current reference is laser-trimmed during production, eliminating the need for any external resistor. This is explicitly stated in the product description and confirmed by the absence of current-setting pins or external feedback nodes in the pinout and functional block diagram.

How does thermal foldback behave in AL5890-30D-13 under sustained high temperature?

When junction temperature exceeds +130°C, AL5890-30D-13 linearly reduces output current to limit power dissipation - as shown in Figure 19. At +150°C, current drops to ~15mA (50% of nominal), preventing thermal runaway. This behavior is inherent to the IC's bandgap-based thermal sensing and requires no external components or configuration.