WCS2702
Hall Effect Base Linear Current Sensor
Features:
Low noise analog signal path
98 mΩ internal conductor resistance
Output voltage proportional to AC and DC current
Min. sensing current 0~2.0A at 5V voltage supply
High Sensitivity 1 mV/mA
Wide operating voltage range 3.0~12 V.
Low operating current 3mA
Nearly zero magnetic hysteresis.
Ratiometric output from supply voltage
10K Hz bandwidth
Functional Description :
The Winson WCS2702 provides economical and precise solution for both
DC and AC current sensing in industrial, commercial and communications
systems. The unique package allows for easy implementation by the customer.
Typical applications include motor control, load detection and management,
over-current fault detection and any intelligent power management system
etc…
The WCS2702 consists of a precise, low-temperature drift linear hall
sensor IC with temperature compensation circuit and a current path with 98
mΩ typical internal conductor resistance. This extremely low resistance can
effectively reduce power loss, operating temperature and increase the
reliability greatly. Applied current flowing through this conduction path
generates a magnetic field which is sensed by the integrated Hall IC and
converted into a proportional voltage.
The terminals of the conductive path are electrically isolated from the
sensor leads. This allow the WCS2702 current sensor to be used in
applications requiring electrical isolation without the use of opto-isolators or
other costly isolation techniques and make system more competitive in cost.
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
WCS2702
Electrical Characteristics:
Characteristic
Supply Voltage
Supply Current
Zero Current Vout
Primary Conductor Resistance
Sensitivity
Bandwidth
Measurable Current Range
Temperature Drift
(T=+25˚C, Vdd=5.0V )
Min Typ Max Units
3.0
─
2.4
─
0.85
－
Vdd=5V (DC
current)
Vdd=5V (AC
RMS)
Ip =0 A
－
－
－
─
3.5
2.5
98
1.0
10
±2.0
1.4
±0.5
12
6.0
2.6
─
1.15
－
－
－
－
V
mA
V
mΩ
V/A
kHz
A
mV/℃
─
IP =0 A
IP =0 A
IP =2 A
IP=
±
2.0 A
Symbol Test Conditions
Vcc
Isupply
V0G
R
primary
△Vout
BW
MCR
△Vout
1.All output-voltage measurements are made with a voltmeter having an input impedance
of at least 100kΩ
2. Do not apply any load on output pin, it will degrade IC’s performance.
Characteristic Diagrams:
WCS2702 Sensitivity standardization (30℃) V.S Temperature
1.20
1.00
0.80
0.60
0.40
0.20
0.00
-40
-30
0.881
-20
0.925
-10
0.959
0
0.982
10
0.995
20
1.001
30
1.000
40
0.991
50
0.974
60
0.953
70
0.929
80
0.901
90
0.868
100
0.834
110
0.792
120℃
0.752
數列1
0.822
V
5
4.5
4
3.5
3
2.5
2
0
0.1
0.2
0.3
0.4
0.5
0.6
WCS2702 Vout V.S IP(+)
y = 0.1018x + 2.3711 Best linear equations
R² = 0.999 the goodness of fit of the trend line
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2 (A)
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
WCS2702
V
3
2.5
2
1.5
1
0.5
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2 (A)
y = -0.0983x + 2.5923 Best linear equations
R² = 0.9996 the goodness of fit of the trend line
WCS2702 Vout V.S IP(-)
(V/A)
1.4
1.2
1
0.8
0.6
0.4
0.2
0
3
4
WCS2702 Sensitivity V.S Supply Voltage
5
6
7
8
9
10
11
12 (V)
(V/A)
1.4
1.2
1
0.8
0.6
0.4
0.2
0
3
3.2
WCS2702 Sensitivity V.S Supply Voltage 3V~5V
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5(V)
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
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