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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)： | 24/32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
Reserved
Li-Ion taper
current
Maximum
overcharge
limit
Reserved
0x2e
0x2f
00
00
0
Not currently used by the bq2945.
Sets the upper taper limit for Li-Ion charge termina-
tion. Stored in 2’s complement.
Sets the maximum amount of overcharge before a
maximum overcharge charge suspend occurs.
Stored in 2’s complement.
Should be programmed to 0.
If the bq2945 is reset and this location is 0, the
bq2945 locks access to any command outside of the
SBD data set. Program to 0x08 for full R/W access.
Initializes FLAGS1
0x38
0x39
10
ff
240mA
0x3a
0x3b
9c
ff
100mAh
0x3c
00
0
Access protect
0x3d
00
SBD access only
FLAGS1
0x3e
00
0
FLAGS2
0x3f
b0
Relative display
Li-Ion chemistry
bq2945 charge
control
Initializes FLAGS2.
Battery voltage
offset
1
0x48
fe
-2mV
Used to adjust the battery voltage offset according to
the following:
Voltage = (V
SB
(mV) + V
OFF
)
Voltage gain
The default value (zero adjustment) for the offset is
12.8
°
C or 0x80.
TOFF
NEW
= TOFF
CURRENT
+
(TEMP
ACTUAL
- TEMP
REPORTED
)
10
Temperature
offset
1
0x49
8a
13.8
°
C
Maximum tem-
perature and
T step
0x4a
8f
Maximum
temperature =
61.2
°
C
T step = 4.6
°
C
Maintenance
compensation =
100%
Fast compensa-
tion = 100%
Maximum charge temperature is 74 - (mt
1.6)
°
C (mt
= upper nibble). The
T step is (dT
2 + 16)/10
°
C
(dT = lower nibble)
Charge
efficiency
0x4b
ff
Sets the fast-charge (high) and maintenance charge
(low) efficiencies. The upper nibbles sets the low ef-
ficiency and the lower nibble adjusts the high effi-
ciency according to the equation:
Nibble = (efficiency%
256 - 196)/4
This packed field is the two’s complement of the de-
sired value in RM when the bq2945 determines a
full-charge termination. If RM is below this value,
RM is set to this value. If RM is above this value,
then RM is not adjusted.
Full-charge
percentage
0x4c
9c
100%
Note:
1.
Can be adjusted to calibrate the battery pack.
Table 10. Example Register Contents (Continued)
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| BR-B21V1-12V | Metal Oxide Resistor; Series:MP800; Resistance:15ohm; Resistance Tolerance:+/- 1 %; Power Rating:20W; Temperature Coefficient:-20 to +50 ppm/ C; Terminal Type:Radial Leaded; Package/Case:2-TO-220; Voltage Rating:300V |
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相關(guān)代理商/技術(shù)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(chǎn)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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