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ZXCT1012 датащи(PDF) 6 Page - Diodes Incorporated

номер детали ZXCT1012
подробное описание детали  Reduced height micro-power current monitor
PDF  10 Pages
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производитель  DIODES [Diodes Incorporated]
домашняя страница  http://www.diodes.com
Logo DIODES - Diodes Incorporated

ZXCT1012 датащи(HTML) 6 Page - Diodes Incorporated

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ZXCT1012
Issue 1 - December 2006
6
www.zetex.com
© Zetex Semiconductors plc 2006
The following lines describe how to scale a load current to an output voltage.
VSENSE
= RSENSE * ILOAD
equation (1)
IOUT
= 10mA/V x VSENSE
equation (2)
VOUT
= IOUT x ROUT
equation (3)
Design example
In the circuit below a 1A current is to be represented by a 100mV output voltage (VOUT):
A)
To be within recommended values choose the value of RSENSE to give:
50mV > VSENSE > 200mV at full load.
For example set VSENSE = 100mV at 1.0A.
From equation (1)
RSENSE
= 0.1V/1.0A
= 0.1
B)
Now choose ROUT to give:
VOUT = 100mV, when VSENSE = 100mV.
From equation (2)
IOUT
= 10mA/V x 0.1
= 1mA
Rearranging equation (3) for ROUT gives:
ROUT = VOUT/IOUT
= 0.1/0.001
= 100
= 0.1 / (0.1 x 0.01) = 100
Typical circuit application
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.
OUT
OUT
OUT
GND
SENSE+
SENSE-
LOAD
ZXCT1012
IN
SENSE



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