OH277 Datasheet, PDF (1/5 Pages) Nanjing Ouzhuo Technology Co., Ltd. – COMPLEMENTARY OUTPUT HALL EFFECT LATCH

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
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
· On-Chip Hall Sensor
· 3.5V to 16V Supply Voltage
· 400mA (avg) Output Sink Current
· Reversed Supply Voltage Protection
· -20oC to 85oC Operating Temperature
Applications
· Dual-Coil Brushless DC Motor
· Dual-Coil Brushless DC Fan
· Revolution Counting
· Speed Measurement
· Low Profile TO-94 (SIP-4L) Package
· ESD Rating: 300V (Machine Model)
Functional Block Diagram
Page 1
Nanjing Ouzhuo Technology co., Ltd
www.ohhall.com
Tel：86-25-52312738，86-25-83247886 FAX: [phone]
www.zbling.com
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