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參數(shù)資料
| 型號(hào)： | 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(cè)計(jì)芯片（帶的SMBus接口）） |
| 文件頁數(shù)： | 16/32頁 |
| 文件大?。?/td> | 256K |
| 代理商： | BQ2945 |
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AverageTimeToFull() (0x13)
This read-only word returns the predicted time until the
Smart Battery reaches full charge at the present aver-
age charge rate (minutes).
Output:
time in minutes to full.
unsigned integer. Returns the remaining
Units: minutes
Range: 0 to 65,534min
Granularity: 2min or better
Invalid data indication: 65,535 indicates battery
is not being charged.
ChargingCurrent() (0x14)
If enabled, the bq2945 sends the desired charging rate in
mA to the Smart Battery Charger.
Output:
maximumchargeroutputcurrentinmA.
unsigned integer.
Transmits/returns the
Units: mA
Range: 0 to 65,534mA
Granularity: 0.2% of the design capacity or better
Invalid data indication:
Smart Charger should operate as a voltage source
outside its maximum regulated current range.
65,535 indicates that the
ChargingVoltage() (0x15)
If enabled, the bq2945 sends the desired voltage in mV
to the Smart Battery Charger.
Output: unsigned integer. Transmits/returns the
charger voltage output in mV.
Units: mV
Range: 0 to 65,534mV
Granularity: 0.2% of the DesignVoltage or better
Invalid data indication: 65,535 indicates that the
Smart Battery Charger should operate as a cur-
rent source outside its maximum regulated volt-
age range.
BatteryStatus() (0x16)
This read-only word returns the battery status word.
Output: unsigned integer. Returns the status reg-
ister with alarm conditions bitmapped as shown in
Table 5.
Some of the BatteryStatus flags (Remaining_Capac-
ity_Alarm and Remaining_Time_Alarm) are calculated
based on current. See Table 8 and 9 for definitions.
CycleCount() (0x17)
This read-only word returns the number of charge/dis-
charge cycles the battery has experienced. A charge/dis-
charge cycle starts from a base value equivalent to the
battery's state-of-charge on completion of a charge cycle.
The bq2945 increments the cycle counter during the cur-
rent charge cycle if the battery has been discharged 15%
below the state-of-charge at the end of the last charge cy-
cle. This prevents false reporting of small charge/discharge
cycles.
The cycle count is stored in EEPROM within
400ms of an update.
Output: unsigned integer. Returns the count of
charge/discharge cycles the battery has
experienced.
Units:cycles
Range: 0 to 65,535 cycles; 65,535 indicates battery
hasexperienced65,535ormorecycles.
Granularity: 1 cycle
DesignCapacity() (0x18)
This read-only word returns the theoretical capacity of a
new pack.
The DesignCapacity value is expressed in
mAh at the nominal discharge rate.
16
bq2945
Alarm Bits
Over_Charged_Alarm
Terminate_Charge_Alarm
Reserved
Over_Temp_Alarm
Terminate_Discharge_Alarm
Reserved
Remaining_Capacity_Alarm
Remaining_Time_Alarm
Status Bits
Initialized
Discharging
Fully_Charged
Fully_Discharged
Error Code
0x8000
0x4000
0x2000
0x1000
0x0800
0x0400
0x0200
0x0100
0x0080
0x0040
0x0020
0x0010
0x0000-
0x000f
Reserved for error codes
Table 5. Status Register
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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(píng)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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