BCD AH278 High voltage hall effect latch Datasheet

Product Brief
HIGH VOLTAGE HALL EFFECT LATCH
Description
The AH278 is an integrated Hall sensor with output driver
designed for electronic commutation of brushless DC
motor applications. The device 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 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 and allows a
wide operating supply voltage ranges.
AH278
Parametric Table
Supply Current (mA)
12.5
Output Saturation Voltage
(24V, 300mA) (V)
0.25
Hysteresis (Gauss)
80
Output Leakage Current (µA)
0.1
Package
TO-94
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
Benefits
·
·
·
·
·
·
·
·
·
·
·
·
·
On-Chip Hall Sensor
4V to 30V Supply Voltage
500mA (avg) Output Sink Current
Build in Protection Diode for Reverse Power
Connecting
-20oC to 85oC Operating Temperature
Low Profile TO-94 (SIP-4L) Package
Build in Over Temperature Protection Function
ESD Rating: 300V(Machine Model)
Good High Temperature Performance
With Over Temperature Protection (OTP) function
Very Low Saturation Voltage
Complementary Output
Optimization Solution: Higher Current at High
Voltage(24V) and Temperature (85oC)
Applications
Additional Available Materials
·
·
·
·
·
·
·
·
12V/24V Dual-Coil Brushless DC Motor/Fan
Power Supply and Switchboard
Communications Facilities
Industrial Equipment
Feb. 2007
Samples
Data Sheet
Reliability Report
ESD Report
BCD Semiconductor Manufacturing Limited
Product Brief
TWO PHASE HALL EFFECT LATCH WITH FG OUTPUT
AH278
Pin Configuration
Z4 Package
(TO-94)
4
GND
3
2
DOB
DO
1
VCC
Ordering Information Example
Package
TO-94
Temperature Range
-20 to 85 oC
Part Number
Marking ID
Packing Type
AH278Z4-AE1
AH278Z4-E1
Bulk
AH278Z4-BE1
AH278Z4-E1
Bulk
Detailed information please refer to the relevant datasheet.
Sales Office:
USA
30920 Huntwood Ave. Hayward, CA 94544,
USA
Tel : +1-510-324-2988
Fax : +1-510-324-2788
Shanghai
8F, B Zone, 900 Yi Shan Road, Shanghai 200233,
China
Tel : 86-21-6495 9539
Fax : 86-21-6485 9673
Taiwan
4F, 298-1 Rui Guang Road, Nei-Hu District, Taipei,
Taiwan
Tel : 886-2-2656-2808
Fax : 886-2-2656-2806
Shenzhen
Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian
District, Shenzhen 518026, China
Tel : 86-755-8826 7951
Fax : 86-755-8826 7865
Feb. 2007
BCD Semiconductor Manufacturing Limited
Similar pages