AH284 データシートの表示（PDF） - Diodes Incorporated.

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AH284

HALL-EFFECT SMART FAN MOTOR CONTROLLER

Diodes Incorporated. 

NOT RECOMMENDED FOR NEW DESIGN

USE AH2985

AH284

HALL-EFFECT SMART FAN MOTOR CONTROLLER

Description

Pin Assignments

The AH284 is a single-chip solution for driving two-coil brushless

direct current (BLDC) fans and motors. The device includes a Hall-

effect sensor, dynamic offset correction and two complementary

open-drain output drivers with internal Zener diode protection.

To help protect the motor coils, the AH284 provides Rotor Lock

Protection which shuts down output drives if rotor lock is detected.

The device automatically re-starts when the rotor lock is removed.

The AH284 is available in SIP-4 and SOT89-5 packages.

(Top View)

(Top View)

284

Vdd 1

1 : Vdd

5 NC

2 : DO GND 2 284

12 3 4

SIP-4

3 : DOB

4 : GND

DO 3

74 DOB

SOT89-5

Features

Applications

• Single-chip Solution

• Operating Voltage: 3.8V to 20V

• Built-in Hall Sensor and Input Amplifier

• Rotor Lock Protection (Lock detection, output shutdown and

automatic re-start)

• Built-in Zener Protection for Output Driver

• Average Output Current up to 500mA

• Packages: SIP-4 and SOT89-5

• Green Molding Compound

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

• Two-coil BLDC Cooling Fans

• Low to Medium Voltage, Low Power BLDC Motors

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

AH284

Document number: DS31051 Rev. 12 - 3

1 of 11

www.diodes.com

June 2017

© Diodes Incorporated

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