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參數(shù)資料
| 型號： | bq2945 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC with SMBus Interface(Gas Gauge芯片（帶SMBus 接口）) |
| 中文描述： | 氣體計IC，帶有SMBus接口（電量監(jiān)測計芯片（帶的SMBus接口）） |
| 文件頁數(shù)： | 25/32頁 |
| 文件大?。?/td> | 256K |
| 代理商： | BQ2945 |
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bq2945
Description
EEPROM
Address
EEPROM
Hex
Contents
Example
Values
Notes
Low
Byte
High
Byte
Low
Byte
High
Byte
Digital filter
0x4d
96
0.30mV
Used to set the digital magnitude filter as described in
Table 2.
Not currently used by the bq2945.
This packed field is the two’s complement of (52.73/x)
where x is the desired self-discharge rate per day (%)
at room temperature.
Voltage gain is packed as two units. For example,
(R4 + R5)/R4 = 7.09 would be stored as: whole number
stored in 0x57 as 7 and the decimal component stored
in 0x56 as 256 x 0.09 = 23 (= 17h).
Should be programmed to 0.
The current gain measurement and current integra-
tion gain are related and defined for the bq2945 cur-
rent measurement. This word equals 37.5/sense resis-
tor value in ohms.
The value programmed is the two’s complement of the
threshold voltage in mV.
The value programmed is the two’s complement of the
threshold voltage in mV.
Reserved
0x4e
00
0
Self-discharge rate
0x4f
2d
0.25%
Voltage gain
1
0x56
0x57
17
07
7.09
Reserved
0x58
0x59
00
00
0
Current measure-
ment gain
1
0x5a
0x5b
ee
02
750
End of discharge
voltage1
End of discharge
voltage final
Full charge
capacity
0x5c
0x5d
20
d1
12000mV
0x5e
0x5f
40
d4
11200mV
0x60
0x61
d0
07
2000mA
This value sets the initial estimated pack capacity.
t step
0x62
ff
20s
The
t step for
T/
t termination equals 20s
the
two’s complement of the byte value.
320s hold-offbyte value.
the two’s complement of the
181
Must be equal to 0xb5.
Not currently used by the bq2945.
Hold-off time
0x63
f0
EEPROM check 2 0x64
Reserved
b5
0x65
0x7f
Note:
1.
Can be adjusted to calibrate the battery pack.
Table 10. Example Register Contents (Continued)
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| BQ294502 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Overvoltage Protection for 2-Series and 3-Series Cell Li-Ion Batteries |
| BQ294502DRVR | 功能描述:電池管理 Overvltg Prot Device RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ294502DRVT | 功能描述:電池管理 Overvltg Prot Device RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ294502EVM-033 | 功能描述:電源管理IC開發(fā)工具 bq294502 Eval Mod RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| BQ294504 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Overvoltage Protection for 2-Series and 3-Series Cell Li-Ion Batteries |
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