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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(jì)IC，帶有SMBus接口（電量監(jiān)測計(jì)芯片（帶的SMBus接口）） |
| 文件頁數(shù)： | 11/32頁 |
| 文件大小： | 256K |
| 代理商： | BQ2945 |
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RemainingCapacityAlarm() (0x01)
This function sets or returns the low-capacity alarm
value.
When RM falls below the RemainingCapac-
ityAlarm value initialized from the external EE-
PROM, the Remaining_Capacity_Alarm bit is set in
BatteryStatus. The system may alter this alarm dur-
ing operation.
Input/Output: unsigned integer. This sets/returns
the value where the Remaining_Capacity_Alarm
bit is set in Battery Status.
Units:mAh
Range:0 to 65,535mAh
RemainingTimeAlarm() (0x02)
This function sets or returns the low remaining time
alarm value. When the AverageTimeToEmpty falls be-
low this value, the Remaining_Time_Alarm bit in Bat-
teryStatus is set. The default value for this register is
programmed in EE 0x02-0x03.
this alarm during operation.
The system may alter
Input/Output: unsigned integer. This sets/returns
the value where the Remaining_Time_Alarm bit is
set in Battery Status
.
Units:minutes
Range:0 to 65,535 minutes
BatteryMode() (0x03)
This read/write word selects the various battery opera-
tional modes. The bq2945 supports the battery capacity
information specified in mAh. This function also deter-
mines whether the bq2945 charging values are broad-
casted to the Smart Battery Charger address.
Writing bit 14 to 1 disables voltage and current Master
Mode broadcasts to the Smart Battery Charger. Bit 14 is
automatically reset to 0 if SMBC and SMBD = 0 for
greater than 2 seconds (i.e.pack removal).
Writing bit 13 to 1 disables all Master Mode broadcasts
including alarm messages to the Smart Battery Charger
and Host. The bit remains set until overwritten. Pro-
gramming bit 3 of FLAGS2 in the EEPROM (EE0x3f)
initializes this bit to a 1.
Bit 7 is the condition request flag. It is set when the
bq2945 is initialized from the EEPROM and reset when
a learning cycle has been completed. It is also set to a 1
if CycleCount increases by 32 without a new learning
cycle.
AtRate() (0x04)
This read/write word is the first half of a two-function
set used to set the AtRate value used in calculations
made by the AtRateTimeToFull and AtRateTime-
ToEmpty.
When the AtRate value is positive, the
AtRateTimeToFull function returns the predicted
time to full-charge at the AtRate value of charge.
11
bq2945
FG294501.eps
S
Battery Address
0001011
0
A
Command Code
A
Data byte low
A
Data byte high
A
P
1
1
8
1
8
1
8
1
1
7
1
S
Bat0001011
0
A
Command Code
A
Battery Address
A
1
1
1
7
1
8
1
1
7
1
S
1
A
A
1
8
1
8
P
Data byte low
Data byte high
S
Battery Address
0001011
8
0
A
Command Code
A
Battery Address
A
1
1
1
7
1
8
1
1
7
1
S
1
A
A
1
8
1
Byte Count =N
Data byte 1
A
A
1
8
1
8
P
Data byte 2
Data byte N
1
bq2945
System Host
Block Read
Read Word
Write Word
A – ACKNOWLEDGE
A – NOT ACKNOWLEDGE
S – START
P – STOP
Figure 3. Host Communication Protocols
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| 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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