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参数资料
| 型号： | DS2788E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/32页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE W/DSP DRV 14TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 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： | 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： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 1437 (CN2011-ZH PDF) |
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Stand-Alone Fuel-Gauge IC with
LED Display Drivers
Average Current Measurement
The Average Current (IAVG) register reports an aver-
age current level over the preceding 28 seconds. The
register value is updated every 28s in two’s comple-
ment form, and is the average of the eight preceding
Current register updates. Figure 6 shows the format of
the Average Current register. Charge currents above
the maximum register value are reported at the maxi-
mum value (7FFFh = +51.2mV). Discharge currents
below the minimum register value are reported at the
minimum value (8000h = -51.2mV).
Current Offset Correction
Every 1024th conversion the ADC measures its input
offset to facilitate offset correction. Offset correction
occurs approximately once per hour. The resulting cor-
rection factor is applied to the subsequent 1023 mea-
surements. During the offset correction conversion, the
ADC does not measure the sense resistor signal. A
maximum error of 1/1024 in the Accumulated Current
(ACR) register is possible; however, to reduce the
error, the current measurement made just prior to the
offset conversion is displayed in the Current register
and is substituted for the dropped current measure-
ment in the current accumulation process. This results
in an accumulated current error due to offset correction
of less than 1/1024.
IAVG
MSB—ADDRESS 08h
Current Offset Bias
The Current Offset Bias (COB) register allows a pro-
grammable offset value to be added to raw current mea-
surements. The result of the raw current measurement
plus COB is displayed as the current measurement
result in the Current register, and is used for current
accumulation. COB can be used to correct for a static
offset error, or can be used to intentionally skew the cur-
rent results and therefore the current accumulation.
COB allows read and write access. Whenever the COB
is written, the new value is applied to all subsequent
current measurements. COB can be programmed in
1.56μV steps to any value between +198.1μV and -
199.7μV. The COB value is stored as a two’s comple-
ment value in nonvolatile memory.
Current Measurement
Calibration
The DS2788 ’s current measurement gain can be
adjusted through the RSGAIN register, which is factory-
calibrated to meet the data sheet specified accuracy.
RSGAIN is user accessible and can be reprogrammed
after module or pack manufacture to improve the cur-
rent measurement accuracy. Adjusting RSGAIN can
correct for variation in an external sense resistor’s nom-
inal value, and allows the use of low-cost, nonprecision
READ ONLY
LSB—ADDRESS 09h
S
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(S)
LSb
MSb
LSb
UNITS: 1.5625μV/R SNS
Figure 6. Average Current Register Format
COB
ADDRESS 7Bh
RW AND EE
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
“S ”: SIGN BIT(S)
Figure 7. Current Offset Bias Register Format
LSb
UNITS: 1.56 μV/R SNS
_______________________________________________________________________________________
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2788E+ | 功能描述:电池管理 Stand-Alone F-Gauge w/LED Display Drvrs 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 |
| DS2788E+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:FUEL GAUGE LI-ION/LI-POL 14TSSOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE W/DSP DRV 14TSSOP |
| DS2788E+T&R | 功能描述:电池管理 Stand-Alone F-Gauge w/LED Display Drvrs 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 |
| DS2788E+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel-Gauge IC with LED Display Drivers |
| DS2788EVKIT+ | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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