Diodes Incorporated AH287-YL-13

Overview

AH287-YL-13 from Diodes Incorporated is a high-voltage Hall-effect smart fan motor controller in SOT89-5L package, integrating on-chip Hall sensor, dual complementary open-drain drivers, rotor-lock shutdown, and automatic restart logic. It operates from 3.8V to 28V, delivers 400mA average output current, and features built-in Zener protection for output drivers-designed specifically for brushless DC cooling fans in automotive HVAC and industrial power supply systems.

For engineers reviewing the AH287-YL-13 datasheet, AH287-YL-13 pinout, AH287-YL-13 application, or AH287-YL-13 equivalent, key selection criteria include its 0.4–0.6s lock-detection timeout, 2.4–3.6s recovery interval, 450mV saturation voltage at 200mA, magnetic operate point (10–60 Gauss), and thermal derating behavior across –40°C to +100°C ambient.

Technical Context

The AH287-YL-13 implements a monolithic Hall-sensor-based commutation controller with integrated regulation and protection logic. Its internal Hall plate detects rotor position via magnetic flux (Bop = 10–60 G, Brp = –60 to –10 G), enabling precise two-phase BLDC coil driving without external sensors.

Lock detection triggers within 400–600 ms when rotation stalls, forcing both DO and DOB outputs into high-impedance state; after 2.4–3.6 s, the device automatically attempts restart. This cycle repeats until mechanical obstruction clears-preventing coil overheating while maintaining system-level fan availability.

Key Specifications

Pinout & Package

Package: SOT89-5L (5-pin, surface-mount, lead-free, green molding compound). Thermal resistance θJA = 156 °C/W (no heatsink); pad layout per Diodes AP02001.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall-effect BLDC fan controller applications.

Compared with A3983SLDTR-T and NCV7703BDR2G, AH287-YL-13 provides fully autonomous stall management in a minimal 5-pin package-reducing design effort for cost-sensitive, single-fan applications where MCU resources are constrained or unavailable.

Availability

AH287-YL-13 is available at Aetrix Electronics and suitable for automotive HVAC blowers, industrial power supply cooling, and server rack fan modules requiring stable component supply despite its discontinued status and documented last-time-buy window.

Supply support for AH287-YL-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The AH287 belongs to Diodes' Smart Motor Control product line, engineered for cost-effective, self-protecting BLDC fan operation in harsh environments-emphasizing integration, reliability, and simplified system-level thermal management.

FAQ

What is the function of the NC pin on AH287-YL-13?

The NC (No Connect) pin in the SOT89-5L package has no internal connection and must remain unconnected or tied to GND per Diodes' AP02001 layout guidance. It serves a mechanical and thermal role in the package structure but carries no electrical signal or power path. Incorrect routing or solder bridging to adjacent pins may cause functional anomalies or thermal imbalance.

Can AH287-YL-13 drive a 48 V fan?

No-AH287-YL-13 is rated for 3.8 V to 28 V supply operation, with absolute maximum Vdd of 30 V. Driving a 48 V fan would exceed its voltage rating and risk immediate device failure. For 48 V systems, external step-down regulation to ≤28 V is mandatory, or alternative controllers such as NCV7703BDR2G (40 V max) should be evaluated.

How does the rotor-lock detection timing behave across temperature?

The lock-detection timeout (TLRP-ON) and restart interval (TLRP-OFF) are internally generated by RC timers and exhibit ±15% variation over –40°C to +100°C ambient. At 100°C, TLRP-ON remains within 0.34–0.69 s and TLRP-OFF within 2.04–4.14 s-ensuring functional safety margins remain intact across full operating range.

Is AH287-YL-13 qualified to AEC-Q100?

No-AH287-YL-13 is not AEC-Q100 qualified. Diodes states that automotive-grade variants require specific change control, PPAP capability, and IATF 16949 manufacturing; this part is marked "OBSOLETE – PART DISCONTINUED" and intended for non-automotive or legacy qualification paths only.