WCS2720

WCS2720
Hall Effect Base Linear Current Sensor
Features:
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Low noise analog signal path
0.4 mΩ internal conductor resistance
Output voltage proportional to AC and DC current
Min. sensing current 0~20A at 5V voltage supply
High Sensitivity 64 mV/A
Wide operating voltage range 3.0~12 V.
Low operating current 3mA
Nearly zero magnetic hysteresis.
Ratiometric output from supply voltage
23K Hz bandwidth
Functional Description :
The Winson WCS2720 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 WCS2720 consists of a precise, low-temperature drift linear hall
sensor IC with temperature compensation circuit and a current path with 0.4
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 WCS2720 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
WCS2720
Function Block:
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
WCS2720
Electrical Characteristics:
(T=+25˚C, Vdd=5.0V )
Characteristic
Min Typ Max Units
Symbol Test Conditions
─
3.0
─
12
V
IP =0 A
─
3.5
6.0
mA
V0G
Rprimary
IP =0 A
IP =10 A
2.4
─
2.5
0.4
2.6
─
V
mΩ
△Vout
BW
IP= ±10 A
54
64
74
mV/A
－
23
－
kHz
－
－
－
±30
20
±0.5
－
－
－
A
Supply Voltage
Vcc
Supply Current
Isupply
Zero Current Vout
Primary Conductor Resistance
Sensitivity
Bandwidth
Measurable Current Range
Vdd=5V (DC current)
Vdd=5V (AC RMS )
Ip =0 A
MCR
△Vout
Temperature Drift
mV/℃
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.
Electrical Diagram:
WCS2720 Sensitivity standardization of 30℃ V.S Temperature
1.2
1
0.8
0.6
0.4
0.2
0
-40℃
-30℃
-20℃
-10℃
0℃
10℃
20℃
數列1 0.8269 0.8853 0.9308 0.9604 0.9819 0.9936 0.9997
30℃
1
40℃
50℃
60℃
70℃
WCS2720 Vout V.S IP (+)
(V)
80℃
90℃
100℃
110℃
120℃
0.9928 0.9783 0.9578 0.9344 0.9057 0.8716 0.8376 0.8009 0.7643
y = 0.0321x + 2.5274 Best linear equations
R² = 0.9998 the goodness of fit of the trend line
3.4
3.2
3
2.8
2.6
2.4
2.2
2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
8.5
9
9.5
10(A)
WCS2720
y = -0.0325x + 2.5971 Best linear equations
R² = 0.9998 the goodness of fit of the trend line
WCS2720 Vout V.S IP (-)
(V)
3
2.5
2
1.5
1
0.5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10(A)
WCS2720 Sensitivity V.S Supply Voltage
V/A
0.08
0.07
0.06
0.05
0.04
0.03
0.02
3
4
5
6
7
8
9
10
11
12 (V)
WCS2720 Sensitivity V.S Supply Voltage 3~5V
V/A
0.08
0.07
0.06
0.05
0.04
0.03
0.02
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
4.8
5(V)
WCS2720
Package Information:
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27