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参数资料
| 型号： | DS2726G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | IC PROT LI+ 5-10CELL 32-TQFP |
| 标准包装： | 2,500 |
| 功能： | 过压/欠压保护 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 5 V ~ 50 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（7x7） |
| 包装： | 带卷 (TR) |
5-Cell to 10-Cell Li+ Protector with
Cell Balancing
Measurement Sequence
The period with which the DS2726 measures voltages
is a function of the discharge overcurrent delay time,
t DOCD . Figure 5 illustrates the measurement sequence.
One measurement period: 4 x t DOCD
V UV , V UV_REL , V CE , V OV , and V BAL are measured
for all cells: 5 x t DOCD /32
Chip performs balancing on even cells: 123 x t DOCD /32
One measurement period: 4 x t DOCD
V UV , V UV_REL , V CE , V OV , and V BAL are measured
for all cells: 5 x t DOCD /32
Chip performs balancing on odd cells: 123 x t DOCD /32
One cell-balancing period: 8 x t DOCD
Overvoltage and Undervoltage
Delay Time
Cell voltages are measured simultaneously and then
sequentially compared to each of the five thresholds
V UV , V UV_REL , V CE , V OV , and V BAL . This sequence is
repeated every four t DOCD intervals. Overvoltage and
undervoltage conditions are time qualified and there-
fore not recognized immediately. If an overvoltage con-
dition exists on any cell for 32 intervals consecutively
(t OVD = 4 x 32 x t DOCD = 128 x t DOCD ), an overvoltage
condition is recognized, and the CC FET is turned off. If
an undervoltage condition exists on any cell for 32
intervals consecutively (t UVD = 4 x 32 x t DOCD = 128 x
t DOCD ) an undervoltage condition is recognized, the
CC and DC FETs are turned off, and Sleep Mode is
entered.
ONE CELL-BALANCING PERIOD
ONE MEASUREMENT PERIOD
t DOCD /
32
1
t DOCD /
32
2
t DOCD /
32
3
t DOCD /
32
4
t DOCD /
32
5
t DOCD /
32
1
t DOCD /
32
2
t DOCD /
32
3
...
t DOCD /
32
123
t DOCD /
32
1
t DOCD /
32
2
t DOCD /
32
3
t DOCD /
32
4
t DOCD /
32
5
t DOCD /
32
1
t DOCD /
32
2
t DOCD /
32
3
...
t DOCD /
32
123
V UV , V UV_REL , V CE , V OV , AND V BAL ARE
MEASURED FOR ALL CELLS
CELL BALANCING IS PERFORMED ON EVEN-
NUMBERED CELLS
V UV , V UV_REL , V CE , V OV , AND V BAL ARE
MEASURED FOR ALL CELLS
CELL BALANCING IS PERFORMED ON ODD-
NUMBERED CELLS
1
2
3
4
5
6
32
4 × t DOCD 4 × t DOCD 4 × t DOCD 4 × t DOCD 4 × t DOCD 4 × t DOCD
...
4 × t DOCD
128 × t DOCD , PART RESPONDS TO V UV , V UV_REL , V CE , V OV , AND V BAL CONDITION
Figure 5. Cell Balancing and Measurement Periods
14
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相关代理商/技术参数 |
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|---|---|
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