Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
APX9031
www.anpec.com.tw
1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Hall Effect Sensor IC
Features
General Description
The APX9031 is an integrated Hall Effect Sensor IC
designed for electric commutation of DC brushless
motor applications. Even with a reverse voltage pro-
tection diode, the APX9031 still can operate at as
low as 3 volts. The APX9031 is available in low cost
TO-92M3 and SOT-89 packages with 3 different
magnetic ranks.
Pin Description
1 : V
DD
2 3
2 : GND
1
3 : OUTPUT
Ordering Information
Front View
On-chip Hall Sensor
Low Operating Supply Voltage : 3 V with Re-
verse Voltage Protection
Versatile sensitivity and hysteresis setting
Reliable and Rugged
TO-92M3 and SOT-89 packages
Applications
Brushless DC Motor
Brushless DC Fan
Speed Measurement
Revolution Counting
APX9031
Magnetic Rank
Handling Code
Temp. Range
Package Code
Magnetic Rank
A : l Bop , Brp l < 70Gauss
B : l Bop , Brp l < 100 Gauss
C : l Bop , Brp l < 150 Gauss
Package Code
E : TO - 92M
D : SOT - 89
Temp. Range
E: - 20 to 85 C
Handling Code
PB : Plastic Bag
TR : Tape & Reel
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
APX9031
www.anpec.com.tw
2
Gnd
Output
APX9031
Reverse
Voltage
Protection
Temperature
Compensated
Voltage
Regulator
Hall
Element
Current
Amplifier
Latch
Circuit
Output
Buffer
Hysteresis
Control
Sensitivity
Control
V
DD
Block Diagram
APX9031
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
DD
Supply Voltage
Operating
3
20
V
V
SAT
Output Saturation Voltage
I
OUT
=20mA, B>Bop
0.2
V
I
DD
Supply Current
V
DD
=20V, B<Brp
3.5
6
mA
I
Leak
Output Leakage Current
V
OUT
=20V, B<Brp
0.5
2
A
t
r
a
Output Rise Time
0.6
s
t
f
a
Output Fall Time
V
DD
=12V, R
L
=820
,
C
L
=20pF
0.3
s
Symbol
Parameter
Rating
Unit
V
DD
Supply Voltage
20
V
I
DD
Supply Current
8
mA
I
O
Output Current
20
mA
P
D
Maximum Power Dissipation
400
mW
T
A
Operating Ambient Temperature
-20 to 85
T
STG
Storage Temperature Range
-55 to 150
T
S
Soldering Temperature (10 seconds)
260
C
Absolute Maximum Ratings
T
A
= 25C unless otherwise noted
Notes
a
: use Figure 1
T
A
= 25C, V
DD
=12V unless otherwise noted
Electical Characteristics
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
APX9031
www.anpec.com.tw
3
Rank
Maximum Operate Point
Bop
Maximum Release Point
Brp
Unit
A
+70
-70
B
+100
-100
C
+150
-150
Gauss
Magnetic Characteristics
T
A
= 25C, V
DD
=12V unless otherwise noted
Definition of Magnetic Switching Points and Hysteresis
Bop max.
Brp min.
0
B
HYS
Output Voltage
2
3
V
DD
1
Scope
R
L
C
L
V
DD
APX9031
Signal Generator
Figure 1 : Switching Circuit for Output Rise Time and Fall Time Measurement
Test Information
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
APX9031
www.anpec.com.tw
4
2
3
1
V
DD
+B
-B
APX9031
R1
R2
L1
L2
C1
C2
Q1
Q2
V
DD
Application Circuit
Figure 2 Typical DC brushless fan application circuit
-30
-20
-10
0
10
20
30
-10
-5
0
5
10
100
125
150
175
200
0
5
10
15
20
Typical Characteristics
Supply Current Vs Supply Voltage
Supply Voltage - V
Supply Current - mA
Output Low Voltage Vs Supply Voltage
Supply Voltage - V
Output Low Voltage - mV
T
A
= 25
C
T
A
= 25
C
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
APX9031
www.anpec.com.tw
5
-20
0
20
40
60
80
100
100
125
150
175
200
225
I
OUT
=20mA
V
DD
=20V
-20 0
20
40
60
80 100
0
1
2
3
4
5
V
DD
=20V
Output Low Voltage vs Ambient Temperature
Temperature -
C
Output Low Voltage- mV
Supply Current vs Temperature
Temperature -
C
Supply Current - mA
Typical Characteristics Cont.
0
5
10
15
20
-100
-75
-50
-25
0
25
50
75
100
Bop
Brp
I
OUT
=20mA
Magnetic Switch Points vs Supply Voltage
Supply Voltage - V
Magnetic Switch Points - G
-200
-150
-100
-50
0
50
100
150
200
-20
0
20
40
60
80 100
Bop
Brp
I
OUT
=20mA
V
DD
=20V
Magnetic Switch Points vs Temperature
Magnetic Switch Points - G
Temperature -
C
T
A
= 25
C
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