Diodes Incorporated AL5810QFJ3-7

Overview

AL5810QFJ3-7 from Diodes Incorporated is an AEC-Q100 Grade 2 qualified automotive linear LED driver with adjustable sink current up to 200mA, ±3% current accuracy at +25°C, 0.5V RSET reference voltage, and 2.0V–60V input voltage range. It operates in high-side or low-side configurations using an external resistor to set LED current and is optimized for interior/exterior automotive lighting requiring stable thermal performance across –40°C to +105°C ambient.

For engineers reviewing the AL5810QFJ3-7 datasheet, AL5810QFJ3-7 pinout, AL5810QFJ3-7 application, or AL5810QFJ3-7 equivalent, this device supports PWM dimming with 500µs minimum on/off pulse width, parallel operation for higher current, and thermal shutdown at +165°C - critical for automotive LED string regulation where supply voltage swing and junction temperature control are design constraints.

Technical Context

The AL5810QFJ3-7 implements a precision current-regulated linear sink architecture with a dedicated RSET pin referenced to OUT, enabling accurate current setting independent of LED forward voltage variation. 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) topologies.

It features internal overtemperature protection with +165°C shutdown threshold and +30°C hysteresis, and maintains ±1% line regulation over 3.5V–60V input while consuming only 300–1000µA quiescent current. The W-DFN2020-3/SWP (Type A) package delivers 2W power dissipation with θJA = 61.66°C/W on standard FR-4 PCB.

Key Specifications

Pinout & Package

AL5810QFJ3-7 uses the wettable flank W-DFN2020-3/SWP (Type A) package (2mm × 2mm), optimized for automated optical inspection (AOI) and thermal performance with 2W power dissipation capability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL5810D-13 and ASL3416SHN, AL5810QFJ3-7 offers optimal balance of compact size, automotive qualification, and ease of analog current setting - ideal for space-constrained, cost-sensitive interior lighting where 200mA and 2W dissipation suffice.

Availability

AL5810QFJ3-7 is available at Aetrix Electronics and suitable for interior automotive lighting, exterior puddle lighting, side marker lights, and instrument cluster backlighting requiring stable component supply, AEC-Q100 compliance, and wettable-flank package compatibility with automated optical inspection.

Supply support for AL5810QFJ3-7 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 ICs, specializing in high-reliability power management, signal integrity, and automotive-grade solutions.

The AL5810Q belongs to Diodes' automotive LED driver product line, designed specifically for robust, thermally efficient constant-current regulation in harsh-temperature vehicle lighting systems - prioritizing AEC-Q100 qualification, minimal external components, and flexible high-/low-side topology support.

FAQ

What is the maximum LED current supported by AL5810QFJ3-7 in the W-DFN2020-3/SWP package?

The AL5810QFJ3-7 supports up to 200mA LED sink current in the W-DFN2020-3/SWP (Type A) package, validated under AEC-Q100 Grade 2 conditions with ambient temperatures up to +105°C and junction temperature limited to +150°C. At 200mA and 2.5V VINOUT, power dissipation is 500mW - well within the 2W package rating on standard PCB layouts.

Can AL5810QFJ3-7 drive LED strings in high-side configuration?

Yes - AL5810QFJ3-7 supports high-side operation: connect VIN to the IN pin, LED anode to the OUT pin, and place the RSET resistor between RSET and OUT pins. This configuration allows the driver to regulate current while keeping the LED cathode grounded, simplifying EMI filtering and enabling shared ground with other vehicle subsystems.

How does the 0.5V RSET reference improve thermal performance compared to typical 1.25V references?

With a 0.5V RSET reference, power dissipated in the current-setting resistor is reduced by ~80% versus a 1.25V reference at the same LED current. For example, at 100mA and RSET = 5kΩ, RSET power drops from 125mW to 50mW - directly lowering board-level thermal load and easing thermal design for densely packed automotive modules.

Is parallel operation of multiple AL5810QFJ3-7 devices supported, and how is current sharing ensured?

Yes - AL5810QFJ3-7 supports parallel operation to increase total regulated current. Current sharing is achieved by connecting all IN pins together to the LED string, all OUT pins to common ground (or common rail), and tying all RSET pins together with a single resistor to OUT. Matching device tolerances (±3%) and symmetrical PCB layout ensure <±5% current imbalance across units.