OCH277H sensor Datasheet

OCH277H Datasheet, PDF, Equivalent


Part Number

OCH277H

Description

Hall sensor

Manufacture

Orient Chip

Total Page 2 Pages
Datasheet
Download OCH277H Datasheet


OCH277H
OCH277H
General Description
The OCH277H is an integrated Hall sensor with
output driver designed for electronic commutation of
brushless DC motor applications. This IC is using HV
BCD process internally includes an on-chip 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-Drain 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).
OCH277H 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 : 3.3V to 20V
Reverse Supply Voltage Protection
For DC motor / Fan Systems
Low Cost Solution
High Sensitivity Hall Sensor
Dual Complementary Open Drain Output
Peak Current up to 700mA (<100uS)
Output Continues Current: 400mA/12V Supply
Built-in Output Protection Clamping Diode
Over Thermal Protection
RoHS Compliant
Available in SIP-4L Packages
-40to +85 Temperature Range
Applications
Two-Coil Design Cooling Fans
DC Brushless Fan
DC Brushless Motor
Office Automated Equipment
Brown-Goods
Home Applications
Car Audio Cooling Fan
Speed Measurement
Pin Configuration
(Top View)
Pin Name
VDD
DO
DOB
GND
Pin No.
SIP-4L
1
2
3
4
Figure 1, Pin Assignments of OCH277H
I/O Pin Function
P Positive Power Supply
O Open Drain Output 1
O Complementary Open Drain Output (2)
P Ground
Page1 - 2
Ver. 1.3 Feb .27, 2018
源于灿瑞 磁传天下

OCH277H
Typical Application Circuit
OCH277H
Figure 2, Typical Application Circuit of OCH277H (SIP-4L)
Ordering Information
Part Number Package Type Packing Qty BOP (Gauss) BRP(Gauss) Temperature Eco Plan Lead
OCH277HAMD
SIP-4L
1500pcs/Bag
5 ~ 50
-50 ~ -5 -40 ~ 85ROHS Cu
OCH277HBMD
SIP-4L
1500pcs/Bag
5 ~ 65
-65 ~ -5 -40 ~ 85ROHS Cu
OCH277HCMD
SIP-4L
1500pcs/Bag
5 ~95
-95 ~ -5 -40 ~ 85ROHS Cu
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Page2 - 2
Ver. 1.3 Feb .27, 2018
源于灿瑞 磁传天下


Features WWW.ORIENT-CHIP.COM OCH277H ◼ Genera l Description The OCH277H is an integra ted Hall sensor with output driver desi gned for electronic commutation of brus hless DC motor applications. This IC is using HV BCD process internally includ es an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies th e Hall voltage, a Schmitt trigger to pr ovide switching hysteresis for noise re jection, a temperature compensation cir cuit to compensate the temperature drif t of Hall sensitivity and two complemen tary open-Drain drivers for sinking lar ge load current. It also includes an in ternal band-gap regulator which is used to provide bias voltage for internal c ircuits. Placing the device in a variab le 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 magneti c flux density reverses and falls below BRP, then causes DO to be turned high (off) and DOB turned low.
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