OH277
COMPLEMENTARY OUTPUT HALL EFFECT LATCH
Order Information
PN
OH277A/B/C
Temperature Range
-20 to 85°C
Package
1000pcs/bag
General Description
:
OH277 is an integrated Hall sensor with output driver
Description:
designed for electronic commutation of brushless DC motor applications. The
device includes an onchip Hall sensor for magnetic sensing, an amplifier that
amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for
noise rejection, a temperature compensation circuit to compensate the temperature drift of
Hall sensitivity and two complementary open-collector drivers for sinking large load
current. It also includes an internal band-gap regulator which is used to provide bias
voltage for internal circuits. Placing the device in a variable magnetic field, if the magnetic
flux density is larger than threshold BOP, the pin DO will be turned low (on) and pin DOB
will be turned high (off). This output state is held until the magnetic flux density reverses
and falls below BRP, then causes DO to be turned high (off) and DOB turned low (on).
Features
Applications
· On-Chip Hall Sensor
· Dual-Coil Brushless DC Motor
· 3.5V to 16V Supply Voltage
· Dual-Coil Brushless DC Fan
· 400mA (avg) Output Sink Current
· Revolution Counting
· Reversed Supply Voltage Protection
· Speed Measurement
· -20oC to 85oC Operating Temperature
· Low Profile TO-94 (SIP-4L) Package
· ESD Rating: 300V (Machine Model)
Functional Block Diagram
Nanjing Ouzhuo Technology co., Ltd
Tel：86-25-52312738，86-25-83247886
Page 1
www.ohhall.com
FAX: 86-25-52312738
www.zbling.com
E-mail: ohhall@163.com
OHHALLSENSOR [ Nanjing Ouzhuo Technology Co., Ltd. ]
