Diodes Incorporated AL5809-100P1-7

Overview

AL5809-100P1-7 from Diodes Incorporated is a two-terminal linear constant current LED driver in PowerDI123 package, delivering precisely regulated 100 mA ±5% over -40°C to +125°C and input-to-output voltage range of 2.5 V to 60 V. It supports both high-side and low-side LED string configurations, features 20 ppm/°C temperature drift, and enables offline LED lamp designs with floating ground architecture rated to 80 V peak.

For engineers reviewing the AL5809-100P1-7 datasheet, AL5809-100P1-7 pinout, AL5809-100P1-7 application, or AL5809-100P1-7 equivalent, key selection criteria include its fixed 100 mA output, 60 V operating voltage rating, thermal shutdown at +165°C, PowerDI123 thermal performance (θJA = 148.6°C/W on FR-4), and compatibility with PWM dimming via external MOSFET switching.

Technical Context

The AL5809-100P1-7 integrates an internal low-dropout regulator powering a precision current mirror circuit with factory-trimmed reference resistor, enabling fixed 100 mA output without external components. Its floating two-terminal topology eliminates ground-referenced control requirements.

It operates across 2.5 V to 60 V differential voltage (V_IN-OUT) with ±5% current accuracy over full temperature range, 1.5 V minimum power-up threshold, and thermal shutdown with 30°C hysteresis triggered at +165°C junction temperature.

Key Specifications

Pinout & Package

AL5809-100P1-7 is housed in PowerDI123 package (3.7 mm × 2.8 mm × 1.78 mm), optimized for thermal dissipation up to 1.24 W on GETEK PCB or 0.68 W on FR-4 with recommended pad layout (X = 1.05 mm, X1 = 4.1 mm, Y = 1.5 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL5809-100S1-7, the PowerDI123 variant delivers 3.5× higher thermal capability for sustained 100 mA operation; versus NSI45015AT1G, it provides 6.7× higher current in same footprint but lacks sub-20 mA options.

Availability

AL5809-100P1-7 is available at Aetrix Electronics and suitable for offline LED lamps, white goods illumination, and LED signage requiring stable component supply, long-lifetime reliability, and industrial temperature range operation.

Supply support for AL5809-100P1-7 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 analog ICs, specializing in high-reliability power management, signal integrity, and LED driver solutions for industrial and consumer markets.

The AL5809 product line delivers two-terminal constant current regulation for cost-sensitive, thermally constrained LED lighting applications-designed specifically to replace passive current-limiting components in AC/DC and DC/DC LED systems.

FAQ

What is the minimum input-to-output voltage required for AL5809-100P1-7 to regulate?

The AL5809-100P1-7 requires a minimum differential voltage of 2.5 V between IN and OUT pins to initiate regulation. Below this threshold, the device remains off. This 2.5 V headroom enables operation with short LED strings (e.g., two 3.2 V LEDs at 6.4 V total) from a 12 V rail while retaining 5.6 V for regulation margin.

Can AL5809-100P1-7 be used in high-side configuration with common-anode LED arrays?

Yes. In high-side configuration, connect the LED array anode to the IN pin and cathode to the OUT pin. The device's floating ground architecture allows OUT to serve as the return path referenced to the LED cathode, enabling direct integration into common-anode topologies without level-shifting circuitry.

How does thermal shutdown behave under continuous overload?

Thermal shutdown activates at +165°C junction temperature and latches off until junction cools by ≥30°C (hysteresis). During shutdown, current ceases completely-no foldback or derating occurs. Recovery is automatic once T_J drops below +135°C, verified in Figure 24 of the datasheet for 100 mA variants.

Is AL5809-100P1-7 compatible with PWM dimming using microcontroller GPIO?

Yes. Drive an N-channel MOSFET (e.g., ZXMN6A11Z) between OUT and ground using a 100–200 Hz PWM signal from MCU GPIO. Minimum on/off pulse width is 500 µs, so 200 Hz (5 ms period) supports 10–90% duty cycle range. Ensure gate drive voltage stays within 0–4 V to avoid overstressing the MOSFET.