Datasheet > HC5FW 500-S

HC5FW 500-S

更新时间： 2025-09-13 18:42:59

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莱姆 - LEM		/
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外部供电 DC 单向

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HC5FW 500-S 数据手册

AUTOMOTIVE CURRENT TRANSDUCER OPEN LOOP TECHNOLOGY

HC5FW 500-S

Introduction

Principle of HC5FW Family

The HC5FW family is for the electronic measurement of DC, AC The open loop transducers use a Hall effect integrated circuit.

or pulsed currents in high power and low voltage automotive The magnetic ﬂux density B, contributing to the rise of the Hall

applications with galvanic separation between the primary voltage, is generated by the primary current I_Pto be measured.

The current to be measured I_Pis supplied by a current source

i.e. battery or generator (Figure 1).

circuit (high power) and the secondary circuit (electronic circuit).

Within the linear region of the hysteresis cycle, B is proportional

to:

The HC5FW family gives you the choice of having different

current measuring ranges in the same housing.

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

Features

● Open Loop transducer using the Hall effect

● Low voltage application

Except for I_P, all terms of this equation are constant.

Therefore:

● Unipolar + 5 V DC power supply

V_H= constant (b) x I_P

● 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 measurement signal V_Hampliﬁed to supply the user output

voltage or current.

Advantages

● Good accuracy

● Good linearity

● Low thermal offset drift

● Low thermal sensitivity drift.

Fig. 1: Principle of the open loop transducer

Automotive applications

● Electrical Power Steering

● Starter Generators

● Converters.

Page 1/7

N° 97.H6.50.000.0

15January2014/Version 0

LEM reserves the right to carry out modiﬁcations on its transducers, in order to improve them, without prior notice

www.lem.com

12 3 4 5 6 7

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