Product Brief
HIGH VOLTAGE HALL EFFECT LATCH
Description
The AH266 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
darlington 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.
Placing the device in a variable magnetic field, if the mag-
netic flux density is larger than threshold B
OP
, 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 den-
sity reverses and falls below B
RP,
then causes DO to be
turned high (off) and DOB turned low (on).
AH266
Parametric Table
Supply Current (mA)
Output Saturation Voltage
(24V, 300mA) (V)
Hysteresis (Gauss)
Output Leakage Current (
µA
)
Package
3.5
0.9
80
0.1
TO-94
Features
·
·
·
·
·
·
·
·
On-Chip Hall Sensor
4V to 30V Supply Voltage
400mA (avg) Output Sink Current
Build in Protection Diode for Reverse Power
Connecting
-20
o
C to 85
o
C Operating Temperature
Low Profile TO-94 (SIP-4L) Package
Build in Over Temperature Protection Function
ESD Rating: 300V(Machine Model)
Benefits
·
·
·
·
·
Good High Temperature Performance
With Over Temperature Protection (OTP)
Function
Low Supply Current
High Driver Capability with Darlington Output
Cost Effect Solution for High Voltage (24V) and
Temperature (85
o
C)
Applications
·
·
·
·
12V/24V Dual-Coil Brushless DC Motor/Fan
Power Supply and Switchboard
Communications Facilities
Industrial Equipment
Additional Available Materials
·
·
·
·
Samples
Data Sheet
Reliability Report
ESD Report
Feb. 2007
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
