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OCH2980
Two Phase Hall-Effect Smart Fan Motor Controller
General Description
The OCH2980 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 OCH2980
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 OCH2980 is available in SIP4 package.
Features
Single-Chip solution
High sensitivity Hall-effect Sensor
Operating Voltage: 3.5V to 18V
Average output current up to 600mA
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 5V/12V 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
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Typical Application Circuit
OCH2980
Two Phase Hall-Effect Smart Fan Motor Controller
Figure 3, Typical Application Circuit of OCH2980
Notes: 5, Recommended value of C is 1uF/ 50V (E-Cap).
Diode D1 is optional and helps to protect the device and fan coils from reverse power conditions.
The OCH2980 also includes an internal reverse blocking diode at VDD pin.
Ordering Information
Part Number Package Type Packing Qty BOP (Gauss) BRP(Gauss) Temperature Eco Plan Lead
OCH2980MD
SIP-4L
1500pcs/Box
25(Typ.)
-25(Typ.) -40 ~ 85ROHS Cu
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Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下