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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)： | 2/32頁 |
| 文件大?。?/td> | 256K |
| 代理商： | BQ2945 |
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Pin Descriptions
V
CC
Supply voltage input
LED
1
–
LED
5
LED display segment outputs
Each output may drive an external LED.
ESCL
Serial memory clock
Output used to clock the data transfer be-
tween the bq2945 and the external non-
volatile configuration memory.
ESDA
Serial memory data and address
Bidirectional pin used to transfer ad-
dress and data to and from the bq2945
and the external nonvolitile configura-
tion memory.
CP
1
–
CP
2
Control pins 1 and 2
These open-drain outputs can be con-
trolled by an SMBus command from the
host. CP
2
can also act as a digital input.
V
SS
Ground
SR
Sense resistor input
The voltage drop (V
SR
) across pins SR and
V
SS
is monitored and integrated over time
to interpret charge and discharge activity.
The SR input is connected to the sense re-
sistor and the negative terminal of the
battery. V
SR
< V
SS
indicates discharge, and
V
SR
> V
SS
indicates charge. The effective
voltage drop, V
SRO
, as seen by the bq2945
is V
SR
+ V
OS
. (See Table 3.)
DISP
Display control input
DISP high disables the LED display. DISP
floating allows the LED display to be active
during charge if the rate is greater than
100mA. DISP low activates the display for
4 seconds.
SB
Secondary battery input
Monitors the pack voltage through a high-
impedance resistor divider network.
pack voltage is reported in the SBD register
function Voltage (0x09) and is monitored for
end-of-discharge voltage and charging volt-
age parameters.
The
SMBD
SMBus data
Open-drain bidirectional pin used to trans-
fer address and data to and from the
bq2945.
SMBC
SMBus clock
Open-drain bidirectional pin used to clock
the data transfer to and from the bq2945.
REF
Reference output for regulator
REF provides a reference output for an op-
tional FET-based micro-regulator.
V
OUT
Supply output
Supplies power to the external EEPROM
configuration memory.
2
bq2945
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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(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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