AH2984(2010) データシートの表示（PDF） - Diodes Incorporated.
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AH2984 Datasheet PDF : 11 Pages
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AH2984
TWO PHASE HALL-EFFECT SMART FAN MOTOR
CONTROLLER
Description
Pin Assignments
The AH2984 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. It is optimized for low start-up
voltage.
(Top View)
AH2984
1 : Vdd
2 : DO
To help protect the motor coils, the AH2984 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. Over temperature shutdown provides
thermal protection for the device.
12 3 4
SIP-4L
3 : DOB
4 : GND
The AH2984 is available in SIP4 and SOT89-5L packages.
(Top View)
Features
• Single-chip solution
• Operating Voltage: 2.5V to 15V
• Built-in Hall sensor and input amplifier
• Rotor Lock Protection (Lock detection, output shutdown
and automatic re-start)
• Built-in reverse voltage protection diode
• Built-in Zener protection for output drivers
• Average output current up to 500mA
• Packages: SIP-4L and SOT89-5L
• “Green” Molding Compound
Vdd 1
5 NC
GND 2 AH2984
GND
DO 3
74 DOB
SOT89-5L
Applications
• Two-coil BLDC Cooling Fans
• Low Voltage/ Low Power BLDC Motors
AH2984
Document number: DS31698 Rev. 3 - 2
1 of 11
www.diodes.com
May 2010
© Diodes Incorporated
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