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General Description
The OCH41F is an integrated Hall Effect
latched sensor designed for electronic commutation
of brush-less DC motor applications. The device
includes an on-chip Hall voltage generator for
magnetic sensing, a comparator that amplifiers the
Hall voltage, and a Schmitt to provide switching
hysteresis for noise rejection, and open-collector
output. An internal bandgap regulator is used to
provide temperature compensated supply voltage
for internal circuits and allows a wide operating
supply range.
A north pole of sufficient strength will turn the
output ON. In the absence of a magnetic field, the
output is OFF.
OCH41F
Bipolar Hall Effect Position Sensor
Features
Wide operating voltage range: 4.0V~30V
Wide operating temperature range: -40°C
~+150°C
Reverse polarity protection
Package: SIP-3L
Applications
Rotor Position Sensing
Brush-less DC Fan
Brush-less DC Motor
Speed measurement
Revolution counting
Pin Configuration
(Top View)
Pin
Name
VCC
GND
Output
Pin No.
1
2
3
Typical Application Circuit
P/O
P
P
O
Pin Function
IC Power Supply
IC Ground
It is low state during the S magnetic field
Figure 1, application circuit of OCH41F
Note: CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is
0.1~1uF. If the VCC power supply is clean, the CIN can be cancelled.
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Rev. 1.2 Feb .27, 2018
源于灿瑞 磁传天下

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Ordering Information
OCH41F
Bipolar Hall Effect Position Sensor
Part Number Package Type Package Qty
OCH41FAMF
SIP-3L
Bulk
1000pcs/bag
Brp
(Gauss)
-80 ~ -5
Bop
(Gauss)
5 ~ 80
Temperature
-40150
Eco Plan
ROHS
Lead/Ball
Finish
Cu Sn
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Page 2-2
Rev. 1.2 Feb .27, 2018
源于灿瑞 磁传天下