ZXCT1010 데이터 시트보기 (PDF) - Zetex => Diodes

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ZXCT1010

Enhanced high-side current monitor

Zetex => Diodes 

PCB trace shunt resistor for low cost solution

The figure opposite shows output characteristics of

the device when using a PCB resistive trace for a low

cost solution in replacement for a conventional shunt

resistor. The graph shows the linear rise in voltage

across the resistor due to the PTC of the material and

demonstrates how this rise in resistance value over

temperature compensates for the NTC of the device.

The figure below shows a PCB layout suggestion.

The resistor section is 25mm x 0.25mm giving

approximately 150mW using 1oz copper. The data for

the normalised graph was obtained using a 1A load

current and a 100W output resistor. An electronic

version of the PCB layout is available at

www.zetex.com/isense

ZXCT1010

Layout shows area of shunt

resistor compared to ZSOT23-5

package (not actual size).

Issue 9 - July 2006

8

© Zetex Semiconductors plc 2006

www.zetex.com

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