OCH2981 Datasheet: Two Phase Hall-Effect Smart Fan Motor Controller





OCH2981 Two Phase Hall-Effect Smart Fan Motor Controller Datasheet

Part Number OCH2981
Description Two Phase Hall-Effect Smart Fan Motor Controller
Manufacture Orient Chip
Total Page 2 Pages
PDF Download Download OCH2981 Datasheet PDF

Features: OCH2981 Two Phase Hall-Effect Smart Fan Motor Controller ◼ General Descripti on The OCH2981 is a single-chip solutio n for driving two-coil brushless direct current (BLDC) fans and motors. The de vice includes a Hall-effect sensor, dyn amic offset correction and two compleme ntary open-drain output drivers with in ternal Zener diode protection. It is op timized for low start-up voltage. To he lp protect the motor coils, the OCH2981 provides Rotor Lock Protection which s huts down output drives if rotor lock i s detected. The device automatically re -starts when the rotor lock is removed. Over temperature shutdown provides the rmal protection for the device. The OCH 2981 is available in SIP4 package. ◼ Features ⚫ Single-Chip solution ⚫ High sensitivity Hall-effect Sensor ⚫ Operating Voltage: 3.5V to 28V ⚫ Ave rage output current up to 300mA ⚫ Bui lt-in Hall sensor and input amplifier Rotor Lock Protection (Lock detectio n, output shutdown and automatic re-start) ⚫ Built-in reverse.

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OCH2981
Two Phase Hall-Effect Smart Fan Motor Controller
General Description
The OCH2981 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.
To help protect the motor coils, the OCH2981
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.
The OCH2981 is available in SIP4 package.
Features
Single-Chip solution
High sensitivity Hall-effect Sensor
Operating Voltage: 3.5V to 28V
Average output current up to 300mA
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
Packages: SIP-4L
Applications
Dual-coil BLDC Cooling Motor/Fans
Low Voltage/ Low Power BLDC Motors
For 12V/24V Fans/Motor
Speed Measurement / Revolution Counting
Pin Configuration
(Top View)
Pin
Name
VDD
DO
DOB
GND
Pin No.
SIP-4L
1
2
3
4
Pin Function
Input Power
Output Pin
Output Pin
Ground
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Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下

     






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