ZXCT1010_06 ZETEX [Zetex Semiconductors], ZXCT1010_06 Datasheet - Page 8

• Manufacturer Part Number: ZXCT1010_06
• Description: Enhanced high-side current monitor
• Manufacturer: ZETEX [Zetex Semiconductors]

ZXCT1010
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
Layout shows area of shunt
resistor compared to ZSOT23-5
package (not actual size).
Issue 9 - July 2006
8
www.zetex.com
© Zetex Semiconductors plc 2006