WCS2705

WCS2705
Hall Effect Base Linear Current Sensor
Features:
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Low noise analog signal path
8.3 mΩ internal conductor resistance
Output voltage proportional to AC and DC current
Min. sensing current 0~5.0A at 5V voltage supply
High Sensitivity 255 mV/A
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 WCS2705 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 WCS2705 consists of a precise, low-temperature drift linear hall
sensor IC with temperature compensation circuit and a current path with 8.3
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 WCS2705 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
WCS2705
Function Block:
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
WCS2705
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 =5 A
2.4
─
2.5
8.3
2.6
─
V
mΩ
Sensitivity
△Vout
IP= ± 5 A
217
255
293
mV/A
Bandwidth
BW
－
10
－
kHz
－
－
－
±7.5
5
±0.5
－
－
－
A
Supply Voltage
Vcc
Supply Current
Isupply
Zero Current Vout
Primary Conductor Resistance
Measurable Current Range
MCR
△Vout
Temperature Drift
Vdd=5V (DC)
Vdd=5V (AC RMS )
Ip =0 A
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:
WCS2705 Sensitivity standardization(30℃) vs. Temperature
1.100
1.000
0.900
0.800
0.700
0.600
0.500
-40
數列1 0.864
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120℃
0.913
0.956
0.983
0.998
1.007
1.007
1.000
0.985
0.967
0.946
0.919
0.893
0.859
0.825
0.782
0.740
y = 0.1388x + 2.3303 Best linear equations
R² = 0.9987 the goodness of fit of the trend line
WCS2705 Vout V.S IP (+)
V
5
4.5
4
3.5
3
2.5
2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
6.5
7
7.5 (A)
WCS2705
y = -0.1346x + 2.6266 Best linear equations
R² = 0.9992 the goodness of fit of the trend line
WCS2705 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 (A)
WCS2705 Sensitivity V.S Supply Voltage
V/A
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
3
4
5
6
7
8
9
10
11
12 (V)
WCS2705 Sensitivity V.S Supply Voltage
V/A
0.3
0.25
0.2
0.15
0.1
0.05
0
3
3.2
3.4
3.6
3.8
4
4.2
4.4
4.6
4.8
5(V)
WCS2705 Sensitivity Standardization V.S Frequency
1.2
1
0.8
0.6
0.4
0.2
0
1
10
100
1000
10000
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27
100000
Hz
WCS2705
Package Information:
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2015/5/27