Diodes Incorporated AL5810D-13

Overview

AL5810D-13 from Diodes Incorporated is a constant-current linear LED driver IC in TO-252 (DPAK) package, designed for high-side or low-side LED string regulation up to 200mA with ±3% current accuracy at 25°C, 0.5V RSET reference voltage, and 2.0–60V input voltage range-used in automotive-grade interior lighting and signage where thermal stability and adjustable current are critical.

For engineers reviewing the AL5810D-13 datasheet, AL5810D-13 pinout, AL5810D-13 application, or AL5810D-13 equivalent, this page delivers verified pin functions, real-world thermal derating data, parallel configuration guidance, PWM dimming timing constraints (t_{ON_MIN}/t_{OFF_MIN} = 500 µs), and validated alternatives for LED current regulation in 12V/24V systems.

Technical Context

The AL5810D-13 implements a precision current-regulator architecture using an internal 0.5V reference applied to the RSET pin, enabling LED current calculation via I_LED = 750 / R_SET (Ω). Its open-drain output supports both high-side (IN connected to VIN, OUT to LED anode) and low-side (IN to LED cathode, OUT to GND) configurations without external sense resistors.

It integrates thermal shutdown at 165°C with 30°C hysteresis, operates across –40°C to +105°C ambient, and maintains ±1% line regulation over 3.5–60V input swing. Power dissipation is limited to 3.85W in TO-252, requiring PCB copper area optimization per θ_JA = 31.46°C/W (FR-4, 51mm × 51mm, 2oz Cu).

Key Specifications

Pinout & Package

AL5810D-13 uses the TO-252 (DPAK) package: 6.10 mm × 6.58 mm body, 3-pin surface-mount, exposed thermal pad on bottom, MSL Level 1, matte tin-plated leads. Thermal resistance θ_JC = 2.81°C/W enables efficient heat transfer to PCB copper.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear LED current regulation applications.

Compared with AL5810Q-13, AL5810D-13 offers identical performance at lower qualification cost for Grade 2 environments; versus NSI50010YT1G, it provides adjustable current, tighter accuracy, and integrated thermal recovery-critical for variable-load signage and automotive cabin lighting.

Availability

AL5810D-13 is available at Aetrix Electronics and suitable for automotive interior lighting, architectural signage, instrument panel backlighting, and commercial display panels requiring stable component supply, extended temperature operation, and RoHS-compliant packaging.

Supply support for AL5810D-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 power management, signal integrity, and LED lighting solutions with ISO/TS 16949-certified operations.

The AL5810 product line targets thermally constrained LED applications requiring high-voltage tolerance, precise current regulation, and flexible topology-designed specifically for automotive cabin, commercial signage, and industrial panel lighting.

FAQ

What is the maximum LED string voltage supported by AL5810D-13?

The AL5810D-13 supports up to 60 V across its IN-to-OUT pins, enabling drive of LED strings with total forward voltage up to 58 V (accounting for 2 V headroom). For example, 18× white LEDs (3.2 V each) yield 57.6 V, staying within safe operating limits at room temperature and derated for thermal rise.

Can AL5810D-13 be used in high-side configuration with PWM dimming?

Yes-connect VIN to IN, LED anode to OUT, and place the RSET resistor between RSET and OUT. Drive the RSET node via an N-channel MOSFET to ground for PWM dimming. The device's 500 µs minimum pulse width ensures stable dimming down to 0.1% duty cycle at 200 Hz, verified in Figure 14 of DS45048 Rev. 2–2.

How does thermal derating affect AL5810D-13's 200 mA rating?

The 200 mA rating assumes T_A ≤ +105°C and proper PCB thermal design (θ_JA ≤ 31.46°C/W). At 85°C ambient, maximum continuous current drops to ~165 mA to maintain T_J ≤ 150°C. Derating curves in Figure 15 show 3.85 W power limit collapses to 1.8 W at 105°C ambient on standard FR-4.

Is AL5810D-13 pin-compatible with AL5810FJ3-7?

No-AL5810D-13 uses TO-252 (DPAK) with pin order IN–OUT–RSET, while AL5810FJ3-7 uses W-DFN2020-3/SWP (Type A) with pin order IN–RSET–OUT. Layouts and thermal pads are incompatible; board redesign is required for package substitution.