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OCH2986
Single Phase Hall-Effect DC Fan Driver
General Description
The OCH2986 is an integrated Hall sensor
with H-Bridged output driver designed for
brushless DC motor applications. The device is
using HV BCD process includes an on-chip Hall
sensor for magnetic sensing, an amplifier that
amplifies the Hall voltage, a comparator to provide
switching hysteresis for noise rejection, a
bi-directional drivers for sinking and driving large
current load.
Placing the device in a variable magnetic
field, if the magnetic flux density is larger than
threshold BOP, the DO is turned to sink and DOB
is turned to drive. This output state is held until the
magnetic flux density reverses and falls below
BRP, then causes DO to be turned to drive and
DOB turned to sink.
OCH2986 is available in SIP-4L package and
is rated over the -40°C to 85°C.
Features
One-chip Solution (Hall Element + Driver)
Input Voltage Range : 3.5V to 20V
For Single Coil DC motor / Fan Systems
High Sensitivity Hall Sensor
Thermal Shutdown Protection
Low Output Switching Current Noise
-40to +85 Temperature Range
RoHS Compliant
Available in SIP-4L Packages
Applications
Single Coil Design Cooling Fans
Single Coil DC Brushless Fan
Single Coil DC Brushless Motor
Office Automated Equipment
Brown-Goods
Home Applications
Car Audio Cooling Fan
Pin Configuration
(Top View)
Figure 1, Pin Assignments of OCH2986
Pin Name
VDD
DO
DOB
GND
Pin No.
1
2
3
4
Pin Function
Positive Power Supply
Output 1
Output 2
Ground
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Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下

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Typical Application Circuit
OCH2986
Single Phase Hall-Effect DC Fan Driver
OCH2986
VDD
1
DO DOB GND
234
OCH2986
VDD
1
DO DOB GND
234
VDD
VDD
D1
Coil C1
≥1uF
NOTE:D1 Is reversed protection diode
Figure 2, Typical Application Circuit of OCH2986 (SIP-4L)
Coil
Ordering Information
Part Number Package Type Packing Qty BOP (Gauss) BRP(Gauss) Temperature Eco Plan Lead
OCH2986MD
SIP-4L
1500pcs/Bag
5 ~ 50
-50 ~ -5 -40 ~ 85ROHS Cu
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Page2 - 2
Ver. 1.1 Feb .27, 2018
源于灿瑞 磁传天下