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ZXCT1012 Datasheet(PDF) 7 Page - Diodes Incorporated

Part # ZXCT1012
Description  Reduced height micro-power current monitor
PDF  10 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZXCT1012 Datasheet(HTML) 7 Page - Diodes Incorporated

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ZXCT1012
Issue 1 - December 2006
7
www.zetex.com
© Zetex Semiconductors plc 2006
Power dissipation
The maximum allowable power dissipation of the device for normal operation (PMAX), is a
function of the package junction to ambient thermal resistance ( JA), maximum junction
temperature (TJMAX), and ambient temperature (Tamb), according to the expression:
PMAX = (TJMAX – Tamb) / JA
The device power dissipation, PD is given by the expression:
PD=IOUT.(VIN-VOUT) watts
Care must be taken when using this device at large input voltages and large sense voltages to
prevent too much power dissipation.
VIN
= 20V
VSENSE = 2.5V
ROUT
= 100
IOUT
= 2.5 x 0.01
= 25mA
VOUT
= IOUT x ROUT
= 25mA x 100
= 2.5V
∴ P
D
= 25mA (20 - 2.5)V
= 438mW
Power Dissipation
0
100
200
300
400
500
600
0
255075
100
125
150
TA - Ambient temperature (°C)
TDFN3x3-5
TSOT23-5



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