ZXCT1010_06 ZETEX [Zetex Semiconductors], ZXCT1010_06 Datasheet - Page 5

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

Power dissipation
The maximum allowable power dissipation of the device
for normal operation (P
junction to ambient thermal resistance (
junction temperature (Tj
(T
Pmax = (Tj
The device power dissipation, P
expression:
P
Applications information
The following lines describe how to scale a load current to an output voltage.
For example:
A 1A current is to be represented by a 100mV output voltage:
1 Choose the value of R
2 Choose R
Schematic diagram
Issue 9 - July 2006
© Zetex Semiconductors plc 2006
SENSE+
D
amb
=I
V
V
For example V
Rearranging
R
R
OUT
SENSE
OUT
OUT
OUT
), according to the expression:
100
.(V
= V
= 0.1 / (0.1 x 0.01) = 100
= 0.01 x V
IN
= V
max
OUT
-V
OUT
IN
OUT
– T
(1)
/(V
- V
to give V
amb
SENSE
) Watts
SENSE
for R
SENSE
LOAD
) /
+
OUT
= 100mV at 1.0A. R
max
x R
SENSE
x 0.01)
ja
max
OUT
-
), is a function of the package
gives:
OUT
), and ambient temperature
= 100mV, when V
to give 50mV > V
(1)
OUT
SENSE-
GND
D
is given by the
SENSE
ja
), maximum
SENSE
5
SENSE
= 0.1/1.0 => 0.1 .
= 100mV.
> 500mV at full load.
ZXCT1010
www.zetex.com