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AH286-WL-7

P1-P3P4-P6P7-P9P10-P10
AH286
Document number: DS31030 Rev. 13 - 4
1 of 10
www.diodes.com
June 2017
© Diodes Incorporated
AH286
PART OBSOLETE – NO ALTERNATE PART
OBSOL ETE – P A RT D ISCO N T INU ED
HALL-EFFECT SMART FAN MOTOR CONTROLLER
Description
The AH286 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 AH286 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
Rotor-lock Detect (RD) output flag allows external monitoring of any
motor locks.
The AH286 is available in SOT89-5 package.
Features
• Single-chip Solution
• Operating Voltage: 3.8V to 20V
• Built-in Hall Sensor and Input Amplifier
• Rotor-lock Detect (RD) Flag
• 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)
Pin Assignments
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.
AH286
Document number: DS31030 Rev. 13 - 4
2 of 10
www.diodes.com
June 2017
© Diodes Incorporated
AH286
PART OBSOLETE – NO ALTERNATE PART
OBSOL ETE – P A RT D ISCO N T INU ED
Typical Application Circuit (Note 4)
286
1
3
2
Vdd
(12V)
Coil2
Coil1
R
pu
RD
D2
D1
C3
5 4
GND
D3
R1
C1
R2
C2
12V DC Brush-Less Fan with RD Output Function
Notes: 4. Typically it is recommended to us a 56 Ohm resistor for R1 and R2 and a 2.2μF E-Cap capacitor for C1, C2 and C3. These values may need to be
optimized depending on the coils used.
To help with IC protection it’s advised to add a Zener diode between Vdd and ground. The Zener diode should be chosen to help prevent the supply voltage
exceeding the maximum rating of the device.
Pin Descriptions
Pin Name
Description
RD
Rotor-state detection
Vdd
Input power
DO
Output pin
DOB
Output pin
GND
Ground
AH286
Document number: DS31030 Rev. 13 - 4
3 of 10
www.diodes.com
June 2017
© Diodes Incorporated
AH286
PART OBSOLETE – NO ALTERNATE PART
OBSOL ETE – P A RT D ISCO N T INU ED
Functional Block Diagram
Hall
Plate
Control Logic
Regulator
Lock detect,
shutdown and
automatic re-start
Vdd
GND
DOB
DO
Amp.
RD
P1-P3P4-P6P7-P9P10-P10

AH286-WL-7

Mfr. #:
Buy AH286-WL-7
Manufacturer:
Diodes Incorporated
Description:
Motor / Motion / Ignition Controllers & Drivers HALL IC AIO DRIVER CMOS DCOIL 3.8V-20V
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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