Diodes Incorporated AH289-YG-13

Overview

AH289-YG-13 from Diodes Incorporated is a monolithic high-voltage Hall-effect smart fan motor controller with integrated on-chip Hall sensor, dual complementary open-drain output drivers (DO/DOB), rotor-lock shutdown protection, automatic restart recovery, and Rotor-State Detection (RD) output. It operates from 3.8V to 28V, delivers 400mA average output current, and is packaged in SOT89-5L for brushless DC fan control in industrial cooling systems.

For engineers reviewing the AH289-YG-13 datasheet, AH289-YG-13 pinout, AH289-YG-13 application, or AH289-YG-13 equivalent, key selection considerations include its 700mA peak output capability, 0.46s lock-detection timeout, 2.25Ω typical R_DS(ON), RD latch behavior (low during rotation), and thermal derating curve up to 100°C ambient.

Technical Context

The AH289 implements a Hall-plate-based commutation controller with internal voltage regulator, lock-detection logic, and automatic recovery timing circuitry. Its dual open-drain outputs drive external fan coil windings in complementary mode, while the RD pin provides latched status indicating rotor motion (low) or stall (high).

It features built-in Zener protection on DO/DOB outputs, thermal shutdown at 150°C junction temperature, and magnetic hysteresis of 60 Gauss between B_OP (10–60 G) and B_RP (−60 to −10 G), enabling robust rotor position sensing across temperature and supply variation.

Key Specifications

Pinout & Package

SOT89-5L thermally enhanced surface-mount package with exposed drain pad; 5-pin configuration optimized for fan motor driver layout and heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart fan motor controller applications.

Compared with A3983SLDTR-T and NCP1701ADR2G, AH289-YG-13 uniquely integrates Hall sensing, dual-output commutation, latch-type RD, and autonomous lock-recovery - reducing BOM count and firmware dependency in space-constrained fan modules.

Availability

AH289-YG-13 is available at Aetrix Electronics and suitable for server chassis cooling, industrial PLC fan control, and telecom power shelf ventilation requiring stable component supply and long-lifecycle support.

Supply support for AH289-YG-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 protection solutions for industrial, computing, and communications markets.

AH289 belongs to Diodes' Smart Fan Controller product line, designed specifically for autonomous, high-reliability brushless DC fan operation in harsh thermal environments without MCU supervision.

FAQ

What is the function of the RD pin?

The RD (Rotor-State Detection) pin is a latched digital output: it drives low during normal rotation and goes high when the rotor stalls. This enables host systems to detect fan failure without polling or complex timing analysis. The latch holds state until rotation resumes, providing unambiguous fault indication even during brief interruptions.

Does AH289-YG-13 require external flyback diodes?

No - AH289-YG-13 includes built-in Zener protection on both DO and DOB outputs, with 42–65V breakdown voltage. This clamps inductive flyback from fan coils, eliminating the need for external diodes in standard 24V fan designs. External diodes may still be used for enhanced ESD robustness in high-noise environments.

How does the automatic restart feature work during rotor lock?

Upon detecting rotor lock (via Hall sensor absence of transitions), AH289 disables DO/DOB for 0.46 seconds, then attempts restart for 2.76 seconds. If rotation remains absent, it repeats this cycle indefinitely until motion resumes. This prevents thermal damage while maintaining readiness to resume operation without external intervention.

Can AH289-YG-13 operate from a 48V supply?

No - AH289-YG-13 has an absolute maximum Vdd rating of 30V and recommended operating range of 3.8V–28V. For 48V systems, a pre-regulator (e.g., buck converter) must supply 24V to Vdd. Attempting direct 48V connection will exceed absolute maximum ratings and cause permanent device failure.