ZXCT1012ET5TA Ver la hoja de datos (PDF) - Diodes Incorporated.
Número de pieza
componentes Descripción
Fabricante
ZXCT1012ET5TA Datasheet PDF : 10 Pages
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ZXCT1012
The following lines describe how to scale a load current to an output voltage.
VSENSE
IOUT
VOUT
= RSENSE * ILOAD
= 10mA/V x VSENSE
= IOUT x ROUT
equation (1)
equation (2)
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
Rearranging equation (3) for ROUT gives:
ROUT = VOUT/IOUT
= 0.1/0.001
= 1mA
= 100⍀
IN
SENSE
SENSE+ SENSE-
ZXCT1012
GND
OUT
OUT
OUT
LOAD
= 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.
Issue 1 - December 2006
6
© Zetex Semiconductors plc 2006
www.zetex.com
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