DVK MLX91205 - CSA-1V DownloadLink 5533

Development Kit
MLX91205 – CSA-1V
Development Kit
MLX91205 / CSA-1V
REV003
1 Description
The development kit provides the needed information and components to evaluate the current sensors
MLX91205 and/or CSA-1V. The main goal is to show the functionalities and the features of the parts in a
simple and effective way, without the need of investing precious time and money for develop design.
The kit includes:
•
•
•
•
•
•
•
1 MLX91205LB mounted on PCB_EC01
1 MLX91205LB mounted on PCB_EC02
1 separate MLX91205LB
3 separate MLX91205HBs
1 separate PCB_EC01
1 separate PCB_EC02
2 shields U_12
The kit does not include a busbar.
Datasheet and Application Note can be found on www.melexis.com
REV003
Page 1 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
2 Specification of EC-01
The included PCB utilizes PCB traces for medium current range measurements. This arrangement was
created for continuous currents up to ±30 A RMS, but can handle, without damage, short current peaks up to
±50 A. The typical sensitivity obtained with this design with and without the use of a magnetic shield is shown
on the last page in the typical Output diagram.
Layer:
Two layer with copper thickness 105µm
The top layer is a conductor
The bottom layer is an expanded ground layer
TOP- layer
Current:
Dimension [l/b/h]:
Bottom- layer
We recommend:
MAX 30A RMS for PCB application
MAX 1kA for Busbar application
36.8mm x 30.5mm x 1.6mm
Top view
Bottom view
Placeholder
Placeholder
for
additional
for additional
shield
shield
Current
IN
REV003
Current
OUT
Page 2 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
3 Specification of EC-02
The included PCB utilizes PCB loops for small current range measurements. This arrangement was created
for continuous currents up to ±30 A RMS, but can handle, without damage, short current peaks up to ±50 A.
The typical sensitivity obtained with this design with and without the use of a magnetic shield is shown on the
last page in the typical Output diagram.
Layer:
Four layers,
Top- and Bottom- layer with copper thickness 105µm,
Second- and the Third- layer with copper thickness 35µm
Three loops are on the PCB
Current:
Dimension [l/b/h]:
Top- layer
Second- layer
Third - layer
Bottom- layer
We recommend:
MAX 30A RMS for PCB application
MAX 1kA for Busbar application
36.8mm x 30.5mm x 2mm
Top view
Bottom view
Placeholder
Placeholder
for
additional
for additional
shield
shield
Current
IN
REV003
Current
OUT
Page 3 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
4 Settings
4.1 Schematic
U1/ DUT:
C1:
C2:
C3:
CSA-1V or 91205
100nF
1nF
1nF
VDD:
GND:
A_OUT:
C_OUT:
pos. supply voltage
supply common
analog sensor output
common output
4.2 Measurement
Single ended output
measure from A_Out to GND
Offset = 2500mV;
Out range = 0mV - 5000mV;
REV003
Differential output
measure from A_Out to CO_Out
Offset = 0mV;
OUT range = -2500mV - +2500mV;
Page 4 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
5 Shield description
The shield is made of soft ferromagnetic material with a high µr value, this attracts and concentrates the
magnetic flux. In order to get a low hysteresis the shields are annealed after shaping. Any applied mechanical
stress will deteriorate the performance and should be avoided. The purpose of the shield is to concentrate the
wanted signal and to reduce the influence of stray fields. Our shield is usable for busbar and PCB
applications.
5.1 Settings
View
Dimension [mm]
Y = thickness =0.8mm
•
•
•
•
•
Material: Mu - Metal with 48%Ni
Shielding factor is > 50 in the linear range
Nonlinearity is < 0.05mT in the linear range
The onset of the saturation starts at about ±25mT
Weight: 3.14g
5.2 Good to know about shield
Simulation
REV003
Recommendation
•
The closer the sensor to the ground plate of the shield,
the better the shielding against external stray fields
try to position the sensor as close as possible to the
ground plate of the shield
•
The higher and longer the shield the better the
shielding
choose the right dimension for your application
•
The closer the sensor to the bus bar the better is the
signal to noise ratio
try to position the sensor as close as possible to the
busbar
Page 5 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
6 OUTPUT Measurement
6.1 Sensor programming
Sensor:
Sensitivity:
Offset:
91205HB
100V/T
< 10mV
CSA-1V / 91205LB
280V/T
< 10mV
6.2 OUTPUT Range without Busbar (Typical values)
Measured with PCB_EC-01
Sensitivity [mV/A]:
Current range [A]:
without shield
CSA-1V /
91205HB
91205LB
12
32
+/-200
+/-70
with shield
CSA-1V /
91205HB
91205LB
18
47
+/-135
+/-50
Measured with PCB_EC-02
Sensitivity [mV/A]:
Current range [A]:
REV003
without shield
CSA-1V /
91205HB
91205LB
26
70
+/-90
+/-30
Page 6 of 9
with shield
CSA-1V /
91205HB
91205LB
45
125
+/-50
+/-18
Mar. 09
Development Kit
MLX91205 – CSA-1V
6.3 OUTPUT Range with Busbar (Typical values)
Measured with PCB_EC-01 and PCB_EC-02
Sensitivity [mV/A]:
Current range [A]:
•
without shield
CSA-1V /
91205HB
91205LB
3
8.5
+/-800
+/-285
with shield
CSA-1V /
91205HB
91205LB
9.9
28
+/-250
+/-90
The dimension of the used copper busbar was 12mm x 100mm x 2mm.
REV003
Page 7 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
7 Typical output
•
CSA-1V shows a similar typical sensitivity as MLX91205LB
7.1 Typical output with PCB_EC-01
5000
4500
4000
Ouput [mV]
3500
3000
2500
2000
1500
1000
500
0
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
25
30
35
25
30
35
Current [A]
91205HB without shield
91205HB with shield
91205LB with shield
91205LB without shield
7.2 Typical output PCB_EC-02
5000
4500
4000
Ouput [mV]
3500
3000
2500
2000
1500
1000
500
0
-35
-30
-25
-20
-15
-10
-5
0
5
10
15
20
Current [A]
REV003
91205HB without shield
91205HB with shield
91205LB with shield
91205LB without shield
Page 8 of 9
Mar. 09
Development Kit
MLX91205 – CSA-1V
7.3 Typical output with bus bar
5000
4500
4000
Ouput [mV]
3500
3000
2500
2000
1500
1000
500
0
-250
-200
-150
-100
-50
0
50
100
150
200
250
Current [A]
REV003
91205HB without shield
91205HB with shield
91205LB with shield
91205LB without shield
Page 9 of 9
Mar. 09
Similar pages