AUTOMOTIVE CURRENT TRANSDUCER
HC5F500-S
Introduction
The HC5F family is for the electronic measurement of DC, AC
or pulsed currents in high power and low voltage automotive
applications with galvanic isolation between the primary circuit
(high power) and the secondary circuit (electronic circuit).
The HC5F family gives you the choice of having different peak
currents (from ± 200 A up to ± 900 A) in the same housing.
Principle of HC5F Family
The open loop transducers uses a Hall effect integrated circuit.
The magnetic flux density B, contributing to the rise of the
Hall voltage, is generated by the primary current I
P
to be
measured.
The current to be measured I
P
is supplied by a current source
i.e. battery or generator (Fig. 1).
Within the linear region of the hysteresis cycle, B is proportional
to:
B
(I
P
) = constant (a) x
I
P
The Hall voltage is thus expressed by:
V
H
= (R
H
/d) x
I
x constant (a) x
I
P
Except for
I
P
, all terms of this equation are constant.
Therefore:
V
H
= constant (b) x
I
P
The measurement signal
V
H
amplified to supply the user output
voltage or current.
Features
● Open Loop transducer using the Hall effect
● Low voltage application
● Unipolar + 5 V DC power supply
● Primary current measuring range up to ± 500 A
● Maximum RMS primary current limited by the busbar, the
magnetic core or the ASIC temperature T° < + 150°C
● Operating temperature range: - 40°C < T° < + 125°C
● Output voltage: full ratiometric (sensitivity and offset)
● High speed transducer.
Advantages
●
Good accuracy
●
Good linearity
● Low thermal offset drift
● Low thermal sensitivity drift.
+V
c
Automotive applications
● Electrical Power Steering
●
Starter Generators
● Converters ...
I
P
V
out
-V
c
0V
Primary current
I
P
Isolated output voltage
Fig. 1: Principle of the open loop transducer
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
www.lem.com
HC5F500-S
Dimensions HC5F500-S family
(in mm.)
Secondary connection
Terminals
Designations
Supply voltage + 5 V DC
3
1
2
E1 to E4
V
OUT
Ground
Ground (*)
(*) Only 1 of these 4 pins could be connected
Bill of materials
● Plastic case
●
Magnetic core
● Pins
●
Mass
PA66-GF25
FeSi alloy
Copper alloy base
tin plated (lead free)
21 g
Remarks
● General tolerance
± 0.2 mm
V
C
●
V
OUT
>
when
I
P
flows in the direction of the arrow.
2
Electronic schematic
LEM sensor
+ 5V
V
C
C2=47 nF
Gnd
+ 5V
I
P
Primary
current
Hall cell
Output
amplifier
V
OUT
R
LOAD
C
LOAD
Signal
C1
R1
CL=4.7 nF
R
1
C
1
Gnd
> 10 KΩ
Nominal value 4.7 nF ± 10 %
(C
LOAD
is obligation to stabilize and to
avoid the ondulation of the output signal)
low pass filter EMC protection (optional)
Gnd
Gnd
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
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HC5F500-S
Absolute maximum ratings (not operating)
Parameter
Supply over voltage
Reverse voltage
Output over voltage
Continuous output current
Output short-circuit duration
Maximum admissible vibration
Rms voltage for AC insulation test 50 Hz, 1 min
Electrostatic discharge voltage
Ambient storage temperature
Clearance distance
Creepage distance
Symbol
V
C
V
out
I
out
t
C
γ
V
d
V
ESD
T
S
Unit
V
V
V
mA
min
m.s
-2
kV
kV
°C
mm
mm
Specification
Min
Typical
Max
7
Not applicable
- 0.5
- 10
V
C
+ 0.5
10
2
200
1.5
2
- 55
1.7
2.55
150
Conditions
No operating, 1 min@ 25°C
No operating
No operating
No operating
ISO 16750-3&4.1.2.1.2.1
IEC 60664 Part 1
JESD22-A114-B
tested after 64H @-55°C connected
dCI
dCp
Operating characteristics
Parameter
Primary current, measuring range
Supply voltage
1)
Output voltage (Analog)
Sensitivity
Current consumption
Load resistance
Symbol
I
P
V
C
V
OUT
Unit
A
V
V
Min
Electrical Data
- 500
4.75
Specification
Typical
Max
500
5.00
4
12
20
5.25
@
V
C
@
V
C
= 5 V
Conditions
V
OUT
= (V
C
/5) x (2.5 +0.004 x I
P
)
G
I
C
R
L
C
L
R
OUT
T
A
mV/A
mA
ΚΩ
Ω
°C
%
A
A
A
mA/°C
- 40
-2
-2
- 1.6
- 2.7
-20
-0.05
-1
10
Capacitive loading
Output internal resistance
Ambient operating temperature
4.7
10
125
2
±1
±1
±5
± 0.025
8
30
0.1
4.9
16
2.4
2
1.6
2.7
20
0.05
1
10
@ - 3 dB
@
V
C
= 5 V
@
V
C
= 5 V
DC to 1 MHz
DC to 1 MHz
@
T
A
= 25°C;
V
C
= 5 V
Performance Data
(1)
Sensitivity error
Electrical offset
Magnetic offset
Offset current
Average temperature coefficient of I
OE
Average temperature coefficient of G
Linearity error
Response time
Frequency bandwidth
Output voltage low
Output voltage high
Output voltage noise peak-peak
Output voltage noise rms
2)
ε
G
I
OE
I
OM
I
O
TCI
OEAV
TCG
AV
T
A
= 25°C
@ After excursion to ±
I
P
;
T
A
= 25°C
T
A
= 25°C
@ - 40°C < T° < 125°C;
V
C
@ - 40°C < T° < 125°C;
V
C
Of full range
%/°C
% IP
µs
kHz
V
V
ε
L
t
r
BW
V
OUTL
V
OUTH
V
no p-p
V
no rms
mV
mV
Notes:
1)
The output voltage
V
OUT
is fully ratiometric. The offset and sensitivity are dependent on the supply voltage
V
C
relative to the following formula:
V
C
1
5
I
P
=
V
OUT
−
× ×
2
G V
C
with G in ( V / A )
2)
Small signal only to avoid excessive heating of the busbar, the magnetic core and the ASIC.
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
www.lem.com
HC5F500-S
PERFORMANCES PARAMETERS DEFINITIONS
Output noise voltage:
The output voltage noise is the result of the noise floor of the
Hall elements and the linear
I
C
amplifier gain.
Magnetic offset:
The magnetic offset is the consequence of an over-current on
the primary side. It’s defined after an excursion of I
P max
.
Linearity:
The maximum positive or negative discrepancy with a reference
straight line V
OUT
= f (I
P
).
Unit: linearity (%) expressed with full scale of I
P max
.
V
OUT
Sensitivity:
The Transducer’s sensitivity
G
is the slope of the straight line
V
out
= f (I
P
), it must establish the relation:
V
out
(I
P
) =
V
C
/5 (G
x
I
P
+ 2.5) (*)
(*) For all symetrics transducers.
Offset with temperature:
The error of the offset in the operating temperature is the
variation of the offset in the temperature considered with the
initial offset at 25°C.
The offset variation
I
OT
is a maximum variation the offset in the
temperature range:
I
OT
=
I
OE
max -
I
OE
min
The Offset drift
TCI
OEAV
is the
I
OT
value divided by the temperature
range.
Sensitivity with temperature:
The error of the sensitivity in the operating temperature
is the
relative variation of sensitivity with the temperature considered
with the initial offset at 25°C.
The sensitivity variation
G
T
is the maximum variation (in ppm or
%) of the sensitivity in the temperature range:
G
T
= (Sensitivity max - Sensitivity min) / Sensitivity at 25°C.
The sensitivity drift
TCG
AV
is the
G
T
value divided by the
temperature range.
Offset voltage @ I
P
= 0 A:
Is the output voltage when the primary current is null. The ideal
value of
V
O
is
V
C
/2 at
V
C
= 5 V. So, the difference of
V
O
-V
C
/2
is called the total offset voltage error. This offset error can be
attributed to the electrical offset (due to the resolution of the
ASIC quiescent voltage trimming), the magnetic offset, the
thermal drift and the thermal hysteresis.
Environmental test specifications
NAME
STANDARD
ENVIRONMENTAL TESTS
Thermal shocks
T° humidity cyclic
Power temp cycle
Temperature humidity
bias
IEC 60068-2-14
test Na (01/2009)
ISO 16750-4
IEC 60068 2-14
test Nb (01/2009)
JESD22-A101
(04/97)
T° - 40°C to 125°C / 30 mn each, 300 cycles not
connected
10 cycles of 24H, high T°, power supply on
monitored
T° - 40°C to 125°C, 15 mn/step, transition time
15 mn 600 cycles
T° 85°C / 85 % RH/ 1000 H power supply on,
monitored each 6H
Non linearity example
Reference
straight line
Max linearity error
I
P
Linearity variation in I
N
%
Response time (delay time) t
r
:
The time between the primary current signal and the output
signal reach at 90 % of its final value
I
[A]
90 %
I
P
t
r
I
S
I
T
CONDITIONS
t
[µs]
MECHANICAL TESTS
Sinus vibration
ISO 16750-3
& 4.1.2.1.2.1
(08/2007)
IEC 60068-2-64
(02/2008)
IEC 60068-2-27
(02/2008)
ISO 16750-3& 4.3
(08/2007)
No power supply- profile 1
f = 100 to 1000 Hz, g = 100 to 200 m/s
2
, 22H/axis,
3 axis, T°C cycle -40°C to 125°C
No power supply g rms = 27.8 m/s
2
, f = 10 Hz to
1 kHz, PSD = 0.14 to 20 (m/s
2
)
2
/Hz 12H/axis X
and Y, 36 H for axis Z, T°C. cycle -40°C to 125°C
Half sine shocks @ 25°C, 25 g/ 15 ms, 132
shocks/direction, 6 directions, 100 g/11 ms,
3 shock/direction, 6 directions
Drop 1 m, 2 falls/part, 1 part/axis, 6 directions,
parts without PCB
Typical:
Theorical value or usual accuracy recorded during the
production.
Random vibration
Stocks
Drop test
ELECTRICAL TESTS
Rms voltage for AC isola-
tion test
Isolation resistance
IEC 60664-1
ISO 16750-2& 4.10
1.5 kV/50 Hz/1 mn
500 V DC, 25°C, R
isolation
> 10 MOhms
EMC TESTS
Electrostatic discharge
Electrostatic discharge
IEC 61000-4-2
JESD22-A114-B
Contact ± 2 kV , air ± 2 kV
HBM: 1.5 kOhms / 100 pF 2kV
Page 4/4
29July2011/version 1
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
www.lem.com
