参数资料
型号: DS2777G+
厂商: Maxim Integrated Products
文件页数: 28/46页
文件大小: 0K
描述: IC FUEL GAUGE LI+ 2CELL 14-TDFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
功能: 燃料,电量检测计/监控器
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4 V ~ 9.2 V
工作温度: -20°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 14-WFDFN 裸露焊盘
供应商设备封装: 14-TDFN-EP(3x5)
包装: 管件
产品目录页面: 1436 (CN2011-ZH PDF)
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Overvoltage Threshold Register Format
The 8-bit Overvoltage Threshold register (VOV) sets the overvoltage threshold for the protection circuitry. An over-
voltage condition is detected if either of the voltages on V IN1 or V IN2 exceeds the OV threshold for t OVD . The LSB of
the VOV register is 2 x 5V/1024 = 31.25mV. The V OV set point can be calculated by the following formula.
V OV = (678 + 2 x Overvoltage_Threshold_Register_Value) x 5V/1024
Example:
Overvoltage Threshold register = 1110110b = 118D
V OV = (678 + 2 x 118) x 5V/1024 = 4.46289V
Overvoltage Threshold Register (7Fh)
BIT 7
X
BIT 6
VOV6
BIT 5
VOV5
BIT 4
VOV4
BIT 3
VOV3
BIT 2
VOV2
BIT 1
VOV1
BIT 0
VOV0
Table 5. VOV Register Programmability
VOV[6:0] BIT FIELD
0000000
0000001
0000010
0000011
0000100
0000101
0000110
0000111
0001000
0001001
0001010
0001011
0001100
0001101
0001110
0001111
...
V OV (V)
3.311
3.320
3.330
3.340
3.350
3.359
3.369
3.379
3.389
3.398
3.408
3.418
3.428
3.438
3.447
3.457
...
VOV[6:0] BIT FIELD
1110000
1110001
1110010
1110011
1110100
1110101
1110110
1110111
1111000
1111001
1111010
1111011
1111100
1111101
1111110
1111111
V OV (V)
4.404
4.414
4.424
4.434
4.443
4.453
4.463
4.473
4.482
4.492
4.502
4.512
4.521
4.531
4.541
4.551
28
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