MAX14921 Evaluation Kit
Evaluates: MAX14921
Cell Readout Section
Theꢀtop-leftꢀsectionꢀisꢀwhereꢀcellꢀvoltagesꢀareꢀreported.ꢀOvervoltage,ꢀundervoltage,ꢀandꢀopen-wireꢀdetectionꢀareꢀ
alsoꢀindicatedꢀhere.ꢀCellꢀbalancingꢀforꢀindivididualꢀcellsꢀcanꢀbeꢀenabled/disabledꢀinꢀthisꢀsectionꢀasꢀwell.ꢀ(Figureꢀ7)
1) CELL VOLTAGE READOUT
2) UV/OV INDICATOR
3) LAST OW DETECT STATUS
4) INDIVIDUAL CELL BALANCE CHECK BOXES
5) TOTAL VOLTAGE READOUT
Figure 7. Cell Readout Section
Table 3. EV Kit Cell Readout Section Details (Figure 7)
ITEM
LABEL
READ/WRITE
DESCRIPTION
These are the cell voltages. Cell voltages are reported individually with 0.1mV
resolution.
1
Voltage
Read
These indicators are updated each time cell voltages are reported. A red indicator
means that the cell voltage is either too high (> 5V) or too low (< 1.5V).
2
3
U/OV
OW
Read
Read
These indicators report the result of the most recent open-wire detection. Gray
boxesꢀindicateꢀnoꢀopen-wireꢀdetectionꢀhasꢀyetꢀbeenꢀrequested.ꢀReferꢀtoꢀtheꢀ
MAX14920/MAX14921ꢀICꢀdataꢀsheetꢀforꢀdetailsꢀregardingꢀhowꢀtoꢀuseꢀtheꢀstatusꢀ
indicators to determine open-wire conditions.
Checkꢀtheseꢀboxesꢀtoꢀenable/disableꢀcellꢀbalancingꢀforꢀindividualꢀcells.ꢀWhenꢀ
theꢀglobalꢀcell-balanceꢀcontrolꢀisꢀenabled,ꢀeachꢀcheckedꢀboxꢀactivatesꢀtheꢀcell-
balancing switch for that corresponding cell. See the Detailed Description of
Hardware section for more details.
4
5
Balance
Pack
Write
Thisꢀfieldꢀreportsꢀtheꢀmathematicalꢀsumꢀofꢀtheꢀindividualꢀcellꢀvoltages.ꢀItꢀisꢀtheꢀ
voltage of the entire cell stack.
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