AH285-YG-13 데이터 시트보기 (PDF) - Diodes Incorporated.
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AH285-YG-13 Datasheet PDF : 10 Pages
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NOT RECOMMENDED FOR NEW DESIGN
USE AH2985
AH285
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Description
Pin Assignments
The AH285 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 AH285 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.
A Tachometer output is provided by open-drain Frequency Generator
(FG) Pin which allows external interface to monitor motor rotation or
speed. The FG output is the magnetic change frequency.
The AH285 is available in SOT89-5 package.
(Top View)
Vdd 1
5 FG
GND 2 285
DO 3
74 DOB
SOT89-5
Features
• Single-chip Solution
• Operating Voltage: 3.8V to 20V
• Built-in Hall Sensor and Input Amplifier
• Tachometer (FG) Output
• Rotor Lock Protection (Lock detection, output shutdown and
automatic re-start)
• Built-in Zener Protection for Output Driver
• Average Output Current up to 500mA
• Packaged in SOT89-5
• Green Molding Compound
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Applications
• 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.
AH285
Document number: DS31029 Rev. 9 - 3
1 of 10
www.diodes.com
June 2017
© Diodes Incorporated
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