HC5F500-S

AUTOMOTIVE CURRENT TRANSDUCER HC5F500-S Principle of HC5F Family 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. Features 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 IP to be measured. The current to be measured IP 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 (IP) = constant (a) x IP ●● 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. The Hall voltage is thus expressed by: VH= (RH/d) x I x constant (a) x IP Except for IP, all terms of this equation are constant. Therefore: VH = constant (b) x IP The measurement signal VH amplified to supply the user output voltage or current. Advantages ●● Good accuracy ●● Good linearity ●● Low thermal offset drift +Vc ●● Low thermal sensitivity drift. Automotive applications IP Vout ●● Electrical Power Steering ●● Starter Generators ●● Converters ... -Vc Primary current I P 0V Isolated output voltage Fig. 1: Principle of the open loop transducer Page 1/4 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 HC5F500-S Dimensions HC5F500-S family (in mm.) Secondary connection Terminals Designations 3 Supply voltage + 5 V DC 1 VOUT 2 Ground E1 to E4 Ground (*) (*) Only 1 of these 4 pins could be connected Remarks Bill of materials ●● Plastic case ●● Magnetic core ●● Pins ●● Mass ●● General tolerance ± 0.2 mm VC when IP flows in the direction of the arrow. 2 PA66-GF25 FeSi alloy Copper alloy base tin plated (lead free) 21 g ●● VOUT > Electronic schematic LEM sensor + 5V VC + 5V IP Primary current C2=47 nF RLOAD CLOAD Gnd Hall cell VOUT Output amplifier R1 CL=4.7 nF Gnd Gnd Signal C1 > 10 KΩ Nominal value 4.7 nF ± 10 % (CLOAD is obligation to stabilize and to avoid the ondulation of the output signal) R 1C 1 low pass filter EMC protection (optional) Gnd Page 2/4 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 HC5F500-S Absolute maximum ratings (not operating) Parameter Symbol Supply over voltage VC Reverse voltage Unit Specification Min Conditions Typical Max V 7 V Not applicable No operating, 1 min@ 25°C No operating Output over voltage Vout V - 0.5 VC + 0.5 No operating Continuous output current Iout mA - 10 10 No operating Output short-circuit duration tC min 2 Maximum admissible vibration γ m.s -2 200 ISO 16750-3&4.1.2.1.2.1 Vd kV 1.5 IEC 60664 Part 1 VESD kV 2 JESD22-A114-B Rms voltage for AC insulation test 50 Hz, 1 min Electrostatic discharge voltage TS °C Clearance distance dCI mm 1.7 Creepage distance dCp mm 2.55 Symbol Unit Ambient storage temperature - 55 150 tested after 64H @-55°C connected Operating characteristics Parameter Min Electrical Data Specification Typical Max Primary current, measuring range IP A - 500 Supply voltage 1) VC V 4.75 VOUT V Sensitivity G mV/A 4 Current consumption IC mA 12 Load resistance RL ΚΩ Capacitive loading CL Output voltage (Analog) ROUT Output internal resistance TA Ambient operating temperature Conditions 500 5.00 5.25 VOUT = (VC/5) x (2.5 +0.004 x IP ) @ VC @ VC = 5 V 20 10 4.7 Ω °C 10 - 40 125 Performance Data (1) Sensitivity error εG % -2 2 @ TA = 25°C; VC = 5 V Electrical offset IOE A -2 ±1 2 TA = 25°C Magnetic offset IOM A - 1.6 ±1 1.6 @ After excursion to ± IP; TA = 25°C Offset current IO A - 2.7 2.7 TA = 25°C Average temperature coefficient of IOE TCIOEAV mA/°C -20 ±5 20 @ - 40°C < T° < 125°C; VC Average temperature coefficient of G TCGAV ± 0.025 0.05 @ - 40°C < T° < 125°C; VC %/°C -0.05 Linearity error εL % IP -1 Response time tr µs Frequency bandwidth 2) BW kHz 30 Output voltage low VOUTL V 0.1 Output voltage high VOUTH V Output voltage noise peak-peak Vno p-p Output voltage noise rms Vno rms 1 8 Of full range 10 @ - 3 dB @ VC = 5 V 4.9 @ VC = 5 V mV 16 DC to 1 MHz mV 2.4 DC to 1 MHz Notes: 1) The output voltage VOUT is fully ratiometric. The offset and sensitivity are dependent on the supply voltage VC relative to the following formula: VC  1 5  IP =  VOUT − × × G V 2 C   2) with G in ( V / A ) Small signal only to avoid excessive heating of the busbar, the magnetic core and the ASIC. Page 3/4 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 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 IC 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 IP max. Linearity: The maximum positive or negative discrepancy with a reference straight line VOUT = f (IP). Unit: linearity (%) expressed with full scale of IP max. VOUT Non linearity example Reference straight line Max linearity error IP Linearity variation in IN % Response time (delay time) tr: The time between the primary current signal and the output signal reach at 90 % of its final value I [A] IT 90 % IS IP Sensitivity: The Transducer’s sensitivity G is the slope of the straight line Vout = f (IP), it must establish the relation: Vout (IP) = VC/5 (G x IP + 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 IOT is a maximum variation the offset in the temperature range: IOT = IOE max - IOE min The Offset drift TCIOEAV is the IOT 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 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 the temperature range. Offset voltage @ IP = 0 A: Is the output voltage when the primary current is null. The ideal value of VO is VC/2 at VC = 5 V. So, the difference of VO -VC/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 CONDITIONS ENVIRONMENTAL TESTS tr t [µs] Typical: Theorical value or usual accuracy recorded during the production. Thermal shocks IEC 60068-2-14 test Na (01/2009) T° - 40°C to 125°C / 30 mn each, 300 cycles not connected T° humidity cyclic ISO 16750-4 10 cycles of 24H, high T°, power supply on monitored Power temp cycle IEC 60068 2-14 test Nb (01/2009) T° - 40°C to 125°C, 15 mn/step, transition time 15 mn 600 cycles Temperature humidity bias JESD22-A101 (04/97) T° 85°C / 85 % RH/ 1000 H power supply on, monitored each 6H Sinus vibration ISO 16750-3 & 4.1.2.1.2.1 (08/2007) No power supply- profile 1 f = 100 to 1000 Hz, g = 100 to 200 m/s2, 22H/axis, 3 axis, T°C cycle -40°C to 125°C Random vibration IEC 60068-2-64 (02/2008) No power supply g rms = 27.8 m/s2, f = 10 Hz to 1 kHz, PSD = 0.14 to 20 (m/s2) 2/Hz 12H/axis X and Y, 36 H for axis Z, T°C. cycle -40°C to 125°C Stocks IEC 60068-2-27 (02/2008) Half sine shocks @ 25°C, 25 g/ 15 ms, 132 shocks/direction, 6 directions, 100 g/11 ms, 3 shock/direction, 6 directions Drop test ISO 16750-3& 4.3 (08/2007) Drop 1 m, 2 falls/part, 1 part/axis, 6 directions, parts without PCB Rms voltage for AC isolation test IEC 60664-1 Isolation resistance ISO 16750-2& 4.10 MECHANICAL TESTS ELECTRICAL TESTS 1.5 kV/50 Hz/1 mn 500 V DC, 25°C, R isolation > 10 MOhms EMC TESTS Electrostatic discharge IEC 61000-4-2 Contact ± 2 kV , air ± 2 kV Electrostatic discharge JESD22-A114-B 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