
High Voltage Hall-Effect Smart Fan Motor Controller
Block Diagram (SIP4)
VCC
1
Regulator
Lock shutdown
and
Automatic recovery
Hall
Plate
Amp.
Control Logic
AH287
2 DO
3 DOB
4
GND
Typical Application Circuit (SIP4)
24V
VCC
D2
287
D1
12 34
GND
C1=1uF
DO
DOB
Anachip Corp.
www.anachip.com.tw
24V brush-less DC fan
2/7
L2
L1
48V
48V
Rev 0.1 Jan 17, 2005