參數(shù)資料
型號(hào)： DS2770
英文描述： Battery Monitor and Charge Controller
中文描述： 電池充電控制器監(jiān)控
文件頁(yè)數(shù)： 10/27頁(yè)
文件大?。?/td> 272K
代理商： DS2770
DS2770
10 of 27
CURRENT REGISTER FORMAT
Figure 5
MSB—Address 0E
LSB—Address 0F
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
LSb
MSb
LSb
Units: 62.5 Ah for internal sense resistor
1.56 Vh for external sense resistor
CURRENT ACCUMULATORS
The current accumulator facilitates remaining capacity estimation by tracking the net current flow into
and out of the battery. Current flow into the battery increments the current accumulator while current
flow out of the battery decrements it. Data is maintained in the current accumulator in two’s complement
format and updated every 3.52s. Figure 6 the format of the current accumulator.
When the internal sense resistor is used, the DS2770 maintains the current accumulator in units of amp-
hours, with a resolution of 250 A and full-scale range of 8.19Ah. When using an external sense resistor,
the DS2770 maintains the current accumulator in units of volt-hours, with a resolution of 6.25 Vh and a
full-scale range of 205mVh.
ACCUMULATED CURRENT REGISTER FORMAT
Figure 6
MSB—Address 10
LSB—Address 11
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
LSb
MSb
LSb
Units: 0.25mAh for internal sense resistor
6.25 Vh for external sense resistor
CURRENT OFFSET COMPENSATION
Current measurement and consequently the current accumulation are internally compensated for offset on
a continual basis to minimize errors from variations in device temperature and supply voltage. Offset
compensation is corrected to ±1LSB at least once per hour. Additionally, the Current Offset Bias Register
provides a user-programmable constant bias value that may be used to correct for errors due to circuit
layout or topology that result in current measurement or current accumulation errors. It can also be used
to arbitrarily apply a constant bias to force the current measurement to be pessimistic, or correct for room
temperature self-discharge. The current offset bias value is stored in EEPROM addresses 32h and 33h in
two’s complement format. The stored value is subtracted from each current measurement; therefore,
positive values (0001h to 7fffh) bias the current measurement and current accumulation in the discharge
direction. Figure 7 shows the format of the Current Offset Bias Register.
相關(guān)PDF資料
PDF描述
DS2770AE Battery Monitor and Charge Controller
DS2770AE-025 Battery Monitor and Charge Controller
DS2770BE Battery Monitor and Charge Controller
DS28E04-100 4096-Bit Addressable 1-Wire EEPROM with PIO
DS28E04S-100 4096-Bit Addressable 1-Wire EEPROM with PIO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2770AE 制造商:Maxim Integrated Products 功能描述:BAT MONITOR CHARGE CNTRL VCV=4.1 - Rail/Tube
DS2770AE/R 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Battery Monitor and Charge Controller
DS2770AE/T 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Battery Monitor and Charge Controller
DS2770AE/T&R 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Battery Monitor and Charge Controller
DS2770AE/TR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
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