ZXCT1012ET5TA Ver la hoja de datos (PDF) - Diodes Incorporated.

Número de pieza

componentes Descripción

Fabricante

ZXCT1012ET5TA

Reduced height micro-power current monitor

Diodes Incorporated. 

ZXCT1012

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.

600

500

400

300

200

100

0

0

Power Dissipation

TDFN3x3-5

TSOT23-5

25

50

75 100 125 150

TA - Ambient temperature (°C)

VIN

ROUT

IOUT

VOUT

∴ PD

= 20V

= 100⍀

VSENSE = 2.5V

= 2.5 x 0.01

= 25mA

= IOUT x ROUT

= 25mA x 100⍀

= 2.5V

= 25mA (20 - 2.5)V

= 438mW

Issue 1 - December 2006

7

© Zetex Semiconductors plc 2006

www.zetex.com

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