ZXCT1010 Просмотр технического описания (PDF) - Diodes Incorporated.

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ZXCT1010

ENHANCED HIGH-SIDE CURRENT MONITOR

Diodes Incorporated. 

APPLICATIONS INFORMATION (Continued)

PCB trace shunt resistor for low cost

solution

The figure below 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 opposite shows a PCB layout suggestion.

The resistor section is 25mm x 0.25mm giving

approximately 150mΩ using 1oz copper. The data

for the normalised graph was obtained using a 1A

load current and a 100Ω output resistor. An

electronic version of the PCB layout is available at

www.zetex.com/isense

ZXCT1010

Actual Size

Layout shows area of shunt

resistor compared to SOT23-5

package. Not actual size

ISSUE 10 - JULY 2007

7

SEMICONDUCTORS

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