ZXCT1009 View Datasheet(PDF) - Zetex => Diodes
Part Name
Description
Manufacturer
ZXCT1009 Datasheet PDF : 9 Pages
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ZXCT1009
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
(θja), maximum junction temperature (Tjmax), and
ambient temperature (Tamb), according to the
expression:
Pmax = (Tjmax – Tamb) / θja
The device power dissipation, PD is given by the
expression:
PD=Iout.(Vin-Vout) Watts
SM8
APPLICATIONS INFORMATION
The following lines describe how to scale a load
current to an output voltage.
Vsense = Vin - Vload
Vout = 0.01 x Vsense x Rout1
E.g.
A 1A current is to be represented by a 100mV output
voltage:
1)Choose the value of Rsense to give 50mV > Vsense
> 500mV at full load.
For example Vsense = 100mV at 1.0A. Rsense =
0.1/1.0 => 0.1 ohms.
2)Choose Rout to give Vout = 100mV, when Vsense =
100mV.
Rearranging 1 for Rout gives:
Rout = Vout /(Vsense x 0.01)
Rout = 0.1 / (0.1 x 0.01) = 100 Ω
SOT23
TYPICAL CIRCUIT APPLICATION
ISSUE 10 - JULY 2007
Where Rload represents any load including DC motors,
a charging battery or further circuitry that requires
monitoring, Rsense can be selected on specific
requirements of accuracy, size and power rating.
5
SEMICONDUCTORS
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