MAX14921EVKIT Datasheet, PDF (9/25 Pages) Maxim Integrated Products – A high-acuuracy 16-cell battery-management reference design

MAX14921 Evaluation Kit
Evaluates: MAX14921
Cell Readout Section
The top-left section is where cell voltages are reported. Overvoltage, undervoltage, and open-wire detection are
also indicated here. Cell balancing for individidual cells can be enabled/disabled in this section as well. (Figure 7)
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
1
2
3
LABEL
Voltage
U/OV
OW
READ/WRITE
Read
Read
DESCRIPTION
These are the cell voltages. Cell voltages are reported individually with 0.1mV
resolution.
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).
Read
These indicators report the result of the most recent open-wire detection. Gray
boxes indicate no open-wire detection has yet been requested. Refer to the
MAX14920/MAX14921 IC data sheet for details regarding how to use the status
indicators to determine open-wire conditions.
Check these boxes to enable/disable cell balancing for individual cells. When
4
Balance
Write
the global cell-balance control is enabled, each checked box activates the cell-
balancing switch for that corresponding cell. See the Detailed Description of
Hardware section for more details.
5
Pack
Read
This field reports the mathematical sum of the individual cell voltages. It is the
voltage of the entire cell stack.
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