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Current monitor simplifies high-voltage circuit protection

Posted: 13 Dec 2007 ?? ?Print Version ?Bookmark and Share

Keywords:current monitor? high-voltage circuits? circuit protection?

Zetex Semiconductors has introduced the ZXCT1080 current monitor. With its extended common-mode sensing voltage range of 3V to 60V, the new device provides a simple solution for high-side current sensing in a wide range of high-voltage circuit protection duties in automotive, industrial motor control and power supply applications.

"By integrating a gain setting resistor, providing a fixed voltage gain of 10, the current monitor also reduces the number of external resistors needed to measure current to just one," said Echo Li, VP of sales at Zetex Asia Pacific. "The reduction in circuit complexity, combined with the monitor's SOT23-5 package, means savings in solution cost and footprint can be achieved."

Working off a separate 4.5V to 12V supply voltage, the ZXCT1080 current monitor enables its ground referred output voltage to be closely matched with ADCs and MCUs and to be protected against harmful overvoltage conditions.

This device is also characterised by a low quiescent currenttypically 80?Awhich serves to reduce the error incurred in translating the actual current being measured into the input sense current required and the overall power consumption.

An automotive AEC-Q100 qualified version is also planned for 1Q 2008.

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