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MAX17843ACB датащи(PDF) 79 Page - Maxim Integrated Products

номер детали MAX17843ACB
подробное описание детали  12-Channel, High-Voltage Smart Sensor Data-Acquisition Interface
PDF  131 Pages
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производитель  MAXIM [Maxim Integrated Products]
домашняя страница  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX17843ACB датащи(HTML) 79 Page - Maxim Integrated Products

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Cn Open Diagnostic
If the cell is disconnected from the input, the correspond-
ing cell-test source (sinking to AGND) pulls the cell input
voltage toward 0V (except for C0, where source to VAA
current source will pull the cell input voltage to VAA). A new
measurement is taken with the current sources enabled,
and a change in measurement value is detected. If no
open circuit exists, then the measurement value changes
by only the value of the test current across the application
circuit series resistor to the Cn pin (see Table 44).
Cn Shorted to SWn Diagnostic
Short circuits between the SWn pins and the cell input
pins are detectable. A shorted SWn pin can be detected
by an acquisition with the relevant cell-balancing switch
off and then again with it on. If the SWn pin is not shorted
to an adjacent cell input pin, no change in the measured
value should be observed for the two cases. If the SWn
pin is shorted to the Cn pin, then the measured value will
change by approximately 40% to 50% when the balancing
switch is turned on based on the values of RBALANCE,
and the balancing switch resistance. A short circuit from
SWn to Cn-1 produces the same effect. By comparing
both the VCELLn measurement value along with the
VCELLn+1 and VCELLn-1 values, it is possible to deter-
mine exactly where the short circuit is located.
Note: I = Test source current, R = HVMUX resistance.
Table 44. Cn Pin Open Diagnostic
Cn PIN OPEN FAULT LOCATION
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
Cell1
Cell1-
3.3V
0V
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Cell2
NC
Cell2+
Cell1
0V
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Cell3
NC
NC
Cell3+
Cell2
0V
NC
NC
NC
NC
NC
NC
NC
NC
NC
Cell4
NC
NC
NC
Cell4+
Cell3
0V
NC
NC
NC
NC
NC
NC
NC
NC
Cell5
NC
NC
NC
NC
Cell5+
Cell4
0V
NC
NC
NC
NC
NC
NC
NC
Cell6
NC
NC
NC
NC
NC
Cell6+
Cell5
0V
NC
NC
NC
NC
NC
NC
Cell7
NC
NC
NC
NC
NC
NC
Cell7+
Cell6
0V
NC
NC
NC
NC
NC
Cell8
NC
NC
NC
NC
NC
NC
NC
Cell8+
Cell7
0V
NC
NC
NC
NC
Cell9
NC
NC
NC
NC
NC
NC
NC
NC
Cell9+
Cell8
0V
NC
NC
NC
Cell10
NC
NC
NC
NC
NC
NC
NC
NC
NC
Cell10+
Cell9
0V
NC
NC
Cell11
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Cell11+
Cell10
0V
NC
Cell12
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Cell12+
Cell11
0V
MAX17843
12-Channel, High-Voltage Smart Sensor
Data-Acquisition Interface
www.maximintegrated.com
Maxim Integrated │ 79



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