AUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGYHABT 100-V/SP20

Introduction

Principle of HABT Family

The HABT 100-V/SP20 current transducer is attached on thebattery cable (or bus-bar) of a vehicle. It provides to an engine
control unit (ECU) the actual value of current flowing in the cablevia a voltage signal and the ambient temperature by an NTC
thermistor. The transducer is linked to the ECU with the wiring
harness using a waterproof connector. The output voltage Vout isfully ratiometric with the supply voltage UC.

The open loop transducers use a Hall effect integrated circuit.
The magnetic flux density B, contributing to the rise of the Hall
voltage, is generated by the primary current IP to be measured.
The current to be measured IP is supplied by a current source
i.e. battery or generator (Figure 1).
Within the linear region of the hysteresis cycle, B is proportionalto:
B (IP) = constant (a) x IP

Features

The Hall voltage is thus expressed by:●● Open Loop transducer using the Hall effect sensor

Except for IP, all terms of this equation are constant.
Therefore:●● Unipolar + 5 V DC power supply●● Primary current measuring range up to ± 100 A●● Maximum RMS primary admissible current: limited by thecable, the magnetic core or the ASIC temperature T° < +VH= (RH/d) x I x constant (a) x IP

VH = constant (b) x IP
The measurement signal VH amplified to supply the user output
voltage or current.

150 °C●● Operating temperature range: - 30 °C < T° < + 90 °C●● Output voltage: fully ratio-metric (in sensitivity and offset)●● Temperature measurement by embedded NTC.

Advantages●● Excellent accuracy●● Very good linearity●● Very low thermal offset drift●● Very low thermal sensitivity drift●● Current & Temperature measurement●● No insertion losses.
Fig. 1: Principle of the open loop transducer

Automotive applications●● Battery monitoring●● HEV application●● EV application.

N° 97.F7.34.020.0
19October2015/version 0

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Dimensions HABT 100-V/SP20 (in mm)

IPIP

Mechanical characteristics		
●● Plastic case

>PBT-GF30<●● Magnetic core

Ferromagnetic alloy●● Pins

Gold plated

System architecture (example)

DCurrent sensor

C1BRemarks

5
1· Vout − VO  · UC
G●● IP = with G in (V/A)●● Vout > Vo when IP flows in the positive direction (see arrow on drawing).

IC1C2A

UdVout10 kΩ

C2CTemp

GND

ECU
ADC

RL = 39 KΩ

10 kΩ
47nf

CTN+ 5V

2.7 kΩ

ADC

CL = 47 nF

100nf

100nf

System architecture

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HABT 100-V/SP20

Absolute ratings (not operating)Parameter

SymbolUnit

Nominal supply voltage
Supply continuous over voltage

VUCReverse voltage

Specification
Min

TypicalMax

4.5

5

5.5
8.5

- 14

1 min @ TA = 25 °C

Over voltage
Continuious output voltage

Vout

V

Continuious output current

IoutmAConditions- 10142 min14

1 min @ TA = 25 °C

10Maximum Output short circuit duration

tcmin

Insulation resistanceRISMΩ10Ambient storage temperature

TS°C- 40100

MinSpecification
TypicalMax

2DC 500 V

Operating characteristics in nominal range (IPN)
Parameter

SymbolUnitConditions

Electrical Data
Supply voltage

UCV

4.5

Continuious output current

Iout

mA-1

Sensitivity errorεG%

Load resistance

RL

ΚΩ

5

5.5
1± 0.591010010100

Capacitive loading

CLnF

Ambient operating temperature

TA°C

Output voltage (diagnostic detection open ground)

Vout

V

0.15

Output voltage (diagnostic detection open UC)

Vout

V

0.15

- 3090

Performance DataICCurrent consumption
Linearity error
Overall accuracy @ I = 0 A @ - 30 to 90 °C
Overall accuracy @ I = 100 A @ - 30 to 90 °C
SensitivitymAεL%

XGAGmVA

5@ TA = 25 °C

710

Over temperature- 0.50.5

Up to 80 A (2)-11

Up to 100 A (2)

- 0.7

0.7

Vout = ± 14 mV; @ UC = 5 V ± 0.05 V- 3.75

3.75

Vout = ± 75 mV; @ UC = 5 V ± 0.05 V

20

Global offset current

IOmA

- 300

300

@ TA = 25 °C

Electrical offset current

IOEmA

- 250

250

@ TA = 25 °C

Magnetic offset current

IOMmA- 200200@ TA = 25 °C

Primary current, measuring range

IPMA- 100100

Output voltage @ Ip= 0Vout

Resolution
Output internal resistanceRout

VUC / 2mV

2.5
@ TA = 25 °C

1Ω

10Step response time to 90 % IPN (1)Over temperature

1.1

Power up timetrµs

25200RNTC

KΩ

2.178

2.2

2.222

Accuracy ± 1 % @ TA = 25 °C

B 25/85 constant

3485

35203555

Accuracy ± 1 %Output clamping voltage low

5.1

6

6.9

92.1

9393.925Setlling time after overload
Negative temperature coefficient resistance

VSZ

Output clamping voltage highTemperature accuracy

Notes:1)
2)% UC°C-22- 40/90 °C power off

With internal filter adjusted at 50 Hz
LEM standard 98.20.00.370.0 method2.
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HABT 100-V/SP20
Global Error
HABT 100-V/SP20: Current global error -30/90°C
32.5 A (50 mV)

260
5040Accuracy (A)200.7 A (14 mV)

1000-10-1-20

Accuracy (mV)30
1-30-2-40-50-3-100-50050100-60

Primary current (A)Output and clamping

Vout (% of U )C(Clamp high)IP =  5 · Vout − VO  · 1 with G in (V/A)
 UC

G

Ip (A)(Clamp low)Temperature output
Simplified formula:
T°C = 3520/ (Ln (RNTC/2200) + 3520/298.15) - 273.15
RNTC = R x UNTC / (UC - UNTC)
Complete formula:
1/T°K=A1+B1*Ln(Rntc/2200)+C1*Ln(Rntc/2200)2+D1*Ln(Rntc/2200)3
with A1 = 0.003354016
B1 = 0.0002866670
C1 = 1.563433 e-6
D1 = 1.327213 e-7
and T °C = T °K - 273.15

UdRRNTCVNTC

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HABT 100-V/SP20
PERFORMANCES PARAMETERS DEFINITIONS
Response time (delay time) tr:

Primary current definition:
Vout

Primary current nominal (IPN)
Primary current, measuring range (IPM)

The time between the primary current signal (IPN) and the output
signal reach at 90 % of its final value.
I [A]IT90 %Vout

IPIP

tr

Definition of typical, minimum and maximum values:
Minimum and maximum values for specified limiting and safety
conditions have to be understood as such as well as values
shown in “typical” graphs. On the other hand, measured values
are part of a statistical distribution that can be specified byan interval with upper and lower limits and a probability formeasured values to lie within this interval. Unless otherwise
stated (e.g. “100 % tested”), the LEM definition for such intervals
designated with “min” and “max” is that the probability forvalues of samples to lie in this interval is 99.73 %. For a normal(Gaussian) distribution, this corresponds to an interval between-3 sigma and +3 sigma. If “typical” values are not obviouslymean or average values, those values are defined to delimit
intervals with a probability of 68.27 %, corresponding to aninterval between -sigma and +sigma for a normal distribution.
Typical, minimum and maximum values are determined during
the initial characterization of a product.
Output noise voltage:
The output voltage noise is the result of the noise floor of theHall elements and the linear amplifier.
Magnetic offset:t [µs]

Sensitivity:
The Transducer’s sensitivity G is the slope of the straight line
Vout = f (IP), it must establish the relation:
Vout (IP) = UC/5 (G ٠ IP + Vo)
Offset with temperature:
The error of the offset in the operating temperature is thevariation of the offset in the temperature considered with theinitial offset at 25 °C.
The offset variation IOT is a maximum variation the offset in thetemperature range:
IOT = IOE max - IOE min
The Offset drift TCIOEAV is the IOT value divided by the temperature
range.
Sensitivity with temperature:

The magnetic offset is the consequence of an over-current on
the primary side. It’s defined after an excursion of IPN.
Linearity:
The maximum positive or negative discrepancy with a reference
straight line Vout = f (IP).
Unit: linearity (%) expressed with full scale of IPN.
Vout

Non linearity example

The error of the sensitivity in the operating temperature is therelative variation of sensitivity with the temperature consideredwith the initial offset at 25 °C.
The sensitivity variation GT is the maximum variation (in ppm or%) of the sensitivity in the temperature range:
GT = (Sensitivity max - Sensitivity min) / Sensitivity at 25 °C.
The sensitivity drift TCGAV is the GT value divided by thetemperature range. Deeper and detailed info available is ourLEM technical sales offices (www.lem.com).
Offset voltage @ IP = 0 A:

Referencestraight line
Max linearity error
IPLinearity variation in IPN

The offset voltage is the output voltage when the primary
current is null. The ideal value of VO is UC/2 at UC = 5 V. So,
the difference of VO -UC/2 is called the total offset voltage error.
This offset error can be attributed to the electrical offset (dueto the resolution of the ASIC quiescent voltage trimming), themagnetic offset, the thermal drift and the thermal hysteresis.
Deeper and detailed info available is our LEM technical sales
offices (www.lem.com).
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HABT 100-V/SP20
Environmental test specifications:

Resistance to bulk current injection (BCI)

Immunity to conducted disturbance test
TOYOTA TCS7006G rev5 (2010) 60 mA Class A, 100 mA Class A, 200 mA Class B
Immunity to radiated disturbance tests

Immunity to radiated electromagnetic field

TOYOTA TCS7006G rev5 (2010)30 V/m, 60 V/m, 100V/m. 1 MHz-400Mhz-2GHz. Class A
200 V/m. 1 MHz-400 MHz-2GHz. Class B

Emission of radio frequency energy: radiated

TOYOTA TCS7026G rev4 (2008)

30 MHz to 1GHz

Resistance to electrostatic discharge tests
Resistance to electrostatic discharges,
equipment not supplied

IEC 61000-4-2 (2001)
Nissan 28401 NDS02 (2008)
EQ/IR03
C = 150 pF; R = 330 Ohms

± 4 kV Contact discharge: Class A± 8 kV Contact discharge: Class A± 15 kV Air discharge: Class A

Resistance to electrostatic discharges,
equipment supplied

Nissan 28401 NDS02 (2008)
EQ/IR04
ISO 10605 (2001)± 4 kV Contact discharge: Class A± 8 kV Contact discharge: Class A± 4 kV Air discharge: Class A± 8 kV Air discharge: Class A± 15 kV Air discharge: Class A± 25 kV Air discharge: Class A

Electrical tests
Engine starting voltage test

6 to 8 V, 1 Hz

Voltage dips tests

1, 5, 10, 15 and 20 ms

Reversed power connection test

13 V/1 min
Environmental tests

Low T °C storage test

Not powered, - 40 °C, 96 ± 2 H

Low T °C operation test

- 30 °C, 192 H, poweredHigh T °C storage test

No powered, 100 °C ± 3.96 H

High T °C operation test

+ 90 °C ± 3, 192 H, powered

Temperature cycle test

30 cycles, 90 °C to - 30 °C, operational 5 H and nonoperational 1 H (180 H)

Thermal shock- 40 °C/+90 °C with 2000 H (30 min + 30 min) no powered

Temperature humidity cycle test
Constant humidity test

+ 60 °C / 90 % RH, 96 H, powered

Vibration in temperature

Resonnance point detection 3 g, 5 to 200 Hz, sweep 10min, 4+2+2 H

Impact test

Free fall @ 1 m, 3 times for each 5 planes, 15 times forconnector plane on concrete

Dew condensation test

2 H @ - 5 °C and 10 Min @ 85 % RH @ 35 °C nooperational

Temperature humidity cycle1000 H 85 °C/ 85% HRSalt spray test

JIS Z 2371

Storage temperature 80 ± 3 °C, storage time 1H minimum
water temperature 25 ± 10 °C Dip depth: 100 mm dippingtime
1 min No water immersion into inside of connector

Dipping test

Spray frost test

Test according to JIS Z 2371.
Leave transducers for 300H at ambient temperature of35 ± 3 °C

JIS D 0203 R2e

Spray frost Conform to JIS D 0203 R2eVibration durability

Ambient temperature 80 ± 3 °C, Frequency 20 to200 Hz, Sweep time: 2 min, Acceleration 43.12 m⋅s2,Time: 3 hours for each directions (top/bottom, left/rightfront/back), Power voltage 5 ± 2 V, measured current: 50to - 100 A

Chemical proof test

Chemical temperature: 25 ± 10 °C Dipping time: 1 min
Exposenal temperature: 80 ± 3 °C exposal time: 1H min
Chemical name: Gasoline, engine, oil, brake oil, antifreeze fluid. Torque converter oil. Washer fluid. Batteryfluid. CRC. WÀX WAX remover. PS. Oil.
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