H288 Datasheet, PDF (1/6 Pages) Hi-Sincerity Mocroelectronics – 3.0V to 20V operating voltage

HI-SINCERITY
MICROELECTRONICS GROUP.
Spec. No. : IC200903
Issued Date : 2009.02.12
Revised Date :
Page No. : 1/6
H288
Complementary Output Hall Effect Sensor IC
Description
H288 is designed to integrate Hall sensor with output driver together on the same chip. It is
suitable for dual coils brush-less DC motors, dual coils brush-less DC Fan, Speed
measurement, and revolution counting.
It includes a bandgap reference voltage source, a Hall device, a amplifier, a Hysteresis
SIP-4L Package
controller and a open-collector output drive capable of sinking up to 300mA current load. An
on-chip protection diode is implemented to prevent reverse power fault.
H288 has a control circuit to prevent “dead angle” from logic race condition in DC Fan. It has excellent characteristic of
temperature compensation. The internal temperature compensated voltage source can let sensor to get uniform sensitivity in a
wide temperature range.
It is rated for operation over temperature rage from -20oC to +85oC and voltage ranges from 3.0V to 20V.
Features
• On-chip Hall sensor
• 3.0V to 20V operating voltage
• Internal Temperature compensation
• Special design providing logic race condition immunity, shorter switching time, and good switch reliability
• 300mA output sink current
• Internal on-chip protection diode
• SIP-4L Package
Applications
• Dual-coil Brush-less DC Motor
• Dual-coil Brush-less DC Fan
• Revolution Counting
• Speed Measurement
Pin Assignment
AHX28787
1234
Name
VCC
DO
DOB
GND
P/I/O
P
O
O
P
Pin #
1
2
3
4
Description
Power Supply Input
Output Pin
Output Pin
Ground
Typical Application Circuit (Brush-Less DC Fan)
AX_H2₂7₈₈7
Coil1
Coil2
1234
+
VCC
-
C1
C2
H288
HSMC Product Specification