LEM’s new isolated surface-mount current transducer family operates from single +5V supply

10th September 2007
Source: LEM
Posted By : ES Admin
LEM’s new isolated surface-mount current transducer family operates from single +5V supply

LEM has extended its range of current transducer families designed to operate from a single +5V power supply with the introduction of the HMS model. The new unit measures only 16 (L) x 13.5 (W) x 12 (H) mm and integrates a primary conductor. It is directly surface-mounted onto a printed circuit board, reducing manufacturing costs.

Four standard models are available to cover nominal AC, DC, pulsed and mixed isolated current measurement of 5, 10, 15 or 20 ARMS, up to 50 kHz, with a measuring span of up to ± 3 x IPN. The same mechanical design is used for all four models so that they can be used to measure current across a complete range of end products.

The internal reference voltage (2.5V) is provided on a separate pin or can be forced by an external reference (between 2 and 2.8V) for reference thermal drift cancellation. Gain and offset are fixed and set so that, at Ipn, the output voltage is equal to Ref in or Ref out ± 0.625 V.

A unique LEM ASIC designed for use with open-loop Hall-effect technology has been used to provide performance improvements. These include better offset and gain drifts and linearity, in addition to an extended operating temperature range (-40 to +85°C) compared to traditional discrete technology.

An additional version of the HMS transducer is being developed for PCB mounting through holes instead of surface mounting and will be available in the next few months.

The transducers are CE marked, conform to the EN 50178 standard and are recognised for industrial applications such as home appliances, variable speed drives, UPS, SMPS, power inverters (solar, wind, etc) and air-conditioners.

The HMS is supplied with a five-year warranty, as are all LEM industrial products.


You must be logged in to comment

Write a comment

No comments




Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

Sensors Converge 2021
22nd June 2021
United States of America San Jose Convention Center
Smart Nation 2021 Expo
16th August 2021
Malasia Malaysia International Trade and Exhibition Centre
EVM Asia Expo 2021
16th August 2021
Malasia Malaysia International Trade and Exhibition Centre
Ceramics Expo 2021
30th August 2021
United States of America Huntington Convention Center of Cleveland