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参数资料
| 型号： | DS2745U+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC BATT MONITOR I2C 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 3,000 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion）；镍金属氢化物（NiMH） |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
DS2745 Low-Cost I 2 C Battery Monitor
CURRENT ACCUMULATION
The Accumulated Current register (ACR) serves as an up/down counter holding a running count of charge stored in
the battery. Current measurement results, plus a programmable bias value are internally summed, or accumulated,
at the completion of each current measurement conversion period with the results displayed in the ACR. The ACR
has a range of 0mVh to +409.6mVh with an LSb of 6.25 μ Vh ?? Additional registers hold fractional results of each
accumulation, however, these bits are not user accessible. The ACR count clamps at FFFFh when accumulating
charge values and at 0000h when accumulating discharge values.
Read and write access is allowed to the ACR. Whenever the ACR is written, fractional accumulation results are
cleared. A write to the ACR also forces the ADC to measure its offset and update the offset correction factor.
Current measurement and accumulation resume (using the new offset correction) with the second conversion
following the write to the ACR. Figure 7 describes the ACR address, format, and resolution.
Figure 7. ACCUMULATED CURRENT REGISTER FORMAT
MSB—Address 10
LSB—Address 11
2 15
2 14
2 13
2 12
2 11
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
“S”: sign bit
LSb
MSb
Units:
LSb
6.25 ? Vh/Rsns
Table 4. ACCUMULATED CURRENT RANGE FOR VARIOUS RSNS VALUES
ACR RANGE
V SS - V SNS
409.6mVh
20m ?
20.48Ah
15m ?
27.31Ah
R SNS
10m ?
40.96Ah
5m ?
81.92Ah
CURRENT OFFSET BIAS
The Current Offset Bias register (COBR) allows a programmable offset value to be added to raw current
measurements. The result of the raw current measurement plus the COBR value is displayed as the current
measurement result in the CURRENT register, and is used for current accumulation. The COBR value can be used
to correct for a static offset error, or can be used to intentionally skew the current results and therefore the current
accumulation.
Read and write access is allowed to COBR. Whenever the COBR is written, the new value is applied to all
subsequent current measurements. COBR can be programmed in 1.56 ? V steps to any value between +198.1 ? V
and -199.7 ? V. The COBR value is stored as a two’s complement value in volatile memory, and must be initialized
via the interface on power-up. Figure 8 describes the COBR address, format, and resolution.
Figure 8. CURRENT OFFSET BIAS REGISTER FORMAT
Address 61
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
LSb
“S”: sign bit
Units:
9 of 15
1.56 ? V/Rsns
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| DS2760BE+T&R | IC BATT MON LI-ION HP 16-TSSOP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2746 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Cost 2-Wire Battery Monitor with Ratiometric A/D Inputs |
| DS2746_07 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Low-Cost 2-Wire Battery Monitor with Ratiometric A/D Inputs |
| DS2746G+ | 功能描述:电池管理 2-Wire Bat Monitor w/Ratiometric A/D IN RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2746G+T&R | 制造商:Maxim Integrated Products 功能描述:MONITOR 2.4V 10TDFN EP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MON BATTERY 2-WIRE 10-TDFN |
| DS2746G+T&R | 功能描述:电池管理 2-Wire Bat Monitor w/Ratiometric A/D IN RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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