User guide for FHS 40-P
Current Transducer
FHS 40-P Kit 8 (G2.00.23.107.0)
Evaluation PCB
Top view
Bottom view
Connectors Pin-OUT
The board has two single row connectors J1 and J2.
•
The four pin one (J1) makes possible to supply the board and access to the output voltage easily.
It has the following pin-out:
Pin #
1
2
Name
V
REF
V
OUT
3
4
•
0
V
C
Description J1 connector
Reference voltage input/output
Output voltage is proportional to the current in the PCB track,
V
OUT
=
V
REF
+
G
I
*I
P
Note that the output voltage is positive when the current flows inside the
tracks according to the direction marked “I
P
” on the PCB
0V
Positive supply voltage 4.75-5.25V; typical consumption 15 mA
The two pin one (J2) makes possible to access to the fast output voltage and standby input easily.
It has the following pin-out:
Pin #
Name
Description J2 connector
1
2
V
OUTFAST
V
OUTFAST
, fast output signal; note that this output is opposite to V
OUT
(see datasheet for connection)
Standby Standby, Set operating or Standby modes (see datasheet for connection)
Manufacturer and reference for J1, J2: PRECI-DIP, 310-13-120-41-001001.
070202/0 KIT N°8
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Thermal Capability
The enclosed evaluation PCB has tracks with thickness of 70 µm.
The dimensions of the tracks drawn on the evaluation PCB lead to some limitations on the maximum continuous
current which can go through the PCB track.
Remark: under normal operating conditions, temperature of some parts of this product might exceed 70°C.
Primary track dimensions:
Parameters
Lx
Ly
L_center
L_cone
W_center
W_piste
Gap_piste
L_out
Th_piste
Value [mm]
32.45
30.51
4.8
2.5
0.78
3
0.33
7.53
0.07
Thermal simulation Cu 70 µm:
Track thickness 70
µm,
PCB thickness 1.6 mm,
T
A
= 83°C, natural convection, I
PN
= 5 A rms or DC.
070202/0 KIT N°8
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The following figures should be taken into account to avoid overheating:
(T primary track = 115 °C)
Cu 35 µm
Maxi rms current I
PN
[A]
0
2
4
5
6
8
T
A
[°C]
115
103.3
66.9
38.6
3.7
NA
∆T
[°C]
0
11.7
48.1
76.4
111.3
NA
T
A
[°C]
115
110
94.9
83.3
68.9
31.9
Cu 70 µm
∆T
[°C]
0
5
20.1
31.7
46.1
83.1
Typical primary current for a maximum track
temperature of 115°C (natural convection)
8
70 microns Cu
Primary current (Arms)
6
35 microns Cu
4
2
0
25
50
75
100
125
Ambient temperature (°C)
070202/0 KIT N°8
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I
P
IN
I
P
OUT
Connect then the primary between pins
I
P
IN and
I
P
OUT.
Features
Magnetic field sensitivity
Current sensitivity
Measuring range
Frequency range
L insertion
Typical 600
Typical 125.6
mini (typical-3σ): 122.8
maxi (typical+3σ): 128.4
Typical ± 16
Unless maxi rms current
reached, see Thermal Capability
DC – 100k
118
mV/mT
mV/A
A
Hz
[nH]
Isolation characteristics
Symbol
Rms voltage for AC isolation
test, 50-60 Hz, 1 min
Impulse withstand voltage
1.2/50 µs
Creepage/Clearance distance
Comparative tracking index
(PCB FR4)
V
D
V
W
dCp/dCl
CTI
Unit
kV
kV
mm
V
Value
4.3
7.8
8
200
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Application example
According to EN 50178 and IEC 61010-1 standards and following conditions:
•
•
•
•
•
Rated isolation voltage 300 V (IEC 61010-1)
Reinforced isolation
Over voltage category OV III
Pollution degree PD1
Non-uniform field
Safety
This transducer must be used in electric/electronic equipment with respect to applicable standards and safety
requirements in accordance with the manufacturer's operating instructions.
Caution, risk of electrical shock
When operating the transducer, certain parts of the module can carry hazardous voltage
(eg: primary busbar, power supply).
Ignoring this warning can lead to injury and/or cause serious damage.
This transducer is a built-in device, whose conducting parts must be inaccessible after installation.
A protective housing or additional shield could be used.
Main supply must be able to be disconnected.
070202/0 KIT N°8
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