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OCH147H
Hall Effect Latched Sensor
General Description
The OCH147H is an integrated Hall effect latched sensor designed for electronic commutation of brush-less DC
motor applications. The device using HV BCD process includes an on-chip Hall voltage generator for magnetic
sensing, a comparator that amplifiers the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise
rejection, and an open-collector output. An internal band-gap regulator is used to provide temperature compensated
supply voltage for internal circuits and allows a wide operating supply range.
If a magnetic flux density larger than threshold Bop,output is turned on(low).The output state is held until a
magnetic flux density reversal falls below Brp causing OUT to be turned off(high).
Features
Wide operating voltage range: 3.3V~26V
Operating temperature range: -40°C ~+150°C
Temperature compensation
Reverse polarity protection
Open-Drain pre-driver
Package: SOT23-3L
Applications
Rotor Position Sensing
Brush-less DC Motor
Speed measurement
Revolution counting
Pin Configuration
(Top View)
3
GND
Name
VDD
Gnd
Output
No.
1
3
2
Application Circuit
VDD
1
Status
P
P
O
OUTPUT
2
Description
IC Power Supply
IC Ground
It is low state during the S magnetic field
3
OCH147H
1
VDD
Cin RL 2.2K
2
Output
CL 20pF
Figure 1, application circuit of OCH147
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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Ver. 1.2 Feb .27, 2018
源于灿瑞 磁传天下

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OCH147H
Hall Effect Latched Sensor
Ordering Information
Part Number Package Type Packing Qty BOP (Gauss) BRP(Gauss) Temperature Eco Plan Lead
OCH147HWAF SOT23-3L
3000pcs
25(Typ.) -25(Typ.) -40 ~ 150ROHS Cu
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Page 2-2
Ver. 1.2 Feb .27, 2018
源于灿瑞 磁传天下