- 您現在的位置：買賣IC網 > PDF目錄385186 > bq2945 (Benchmark Technology Group) Gas Gauge IC with SMBus Interface(Gas Gauge芯片（帶SMBus 接口）) PDF資料下載
參數資料
| 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（電量監測計芯片（帶的SMBus接口）） |
| 文件頁數： | 1/32頁 |
| 文件大?。?/td> | 256K |
| 代理商： | BQ2945 |
當前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
1
Features
Provides accurate measurement
of available charge in NiCd,
NiMH, and Li-Ion batteries
Supports SBS v1.0 data set and
two-wire interface
Two programmable general
purpose output ports for added
flexibility
Designed for battery pack inte-
gration
-
Low operating current
-
Complete circuit can fit on less
than square inch of PCB
space
Supports SBS charge control
commands for NiCd, NiMH, and
Li-Ion
Drives a five-segment LED dis-
play for remaining capacity
indication
16-pin narrow SOIC
General Description
The bq2945 Gas Gauge IC With
SMBus Interface is intended for
battery-pack or in-system installa-
tion to maintain an accurate record
of available battery charge. The
bq2945 directly supports capacity
monitoring for NiCd, NiMH, and
Li-Ion battery chemistries.
The bq2945 uses the System Man-
agement Bus v1.0 (SMBus) protocol
and supports the Smart Battery
Data (SBData) commands. The
bq2945 also supports the SBData
charge control functions.
state-of-charge, remaining capacity,
remaining time, and chemistry are
available over the serial link.
Battery-charge state can be directly
indicated using a five-segment LED
display to graphically depict battery
full-to-empty in 20% increments.
Battery
The bq2945 estimates battery self-
discharge based on an internal
timer and temperature sensor and
user-programmable rate informa-
tion stored in external EEPROM.
The bq2945 also automatically re-
calibrates or “learns” battery capac-
ity in the full course of a discharge
cycle from full to empty.
The bq2945 may operate directly
from three nickel chemistry cells.
With the REF output and an exter-
nal transistor, a simple, inexpensive
regulator can be built to provide V
CC
for other battery cell configurations.
An external EEPROM programs
initial values into the bq2945 and is
necessary for proper operation.
bq2945
Gas Gauge IC with SMBus Interface
V
CC
3.0–6.5V
LED
1
LED segment 1/
EEPROM clock
LED
2
LED segment 2/
EEPROM data
LED
3
LED segment 3
LED
4
LED segment 4
LED
5
LED segment 5
CP
1
Control pin 1
V
SS
System ground
1
PN294501.eps
16-Pin Narrow SOIC
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VOUT
REF
SMBC
SMBD
CP2
SB
DISP
SR
VCC
LED1/ESCL
LED2/ESDA
LED3
LED4
LED5
CP1
VSS
SR
Sense resistor input
DISP
Display control input
SB
Battery sense input
CP
2
Control pin 2
SMBD
SMBus data input/output
SMBC
SMBus clock
REF
Voltage reference output
V
OUT
EEPROM supply output
6/99 C
Pin Connections
Pin Names
相關PDF資料 |
PDF描述 |
|---|---|
| BR-B6134-05V | RESISTOR LED LAMPS (ROUND TYPES) |
| BR-B51V1-05V | RESISTOR LED LAMPS (ROUND TYPES) |
| BR-B61V1-05V | RESISTOR LED LAMPS (ROUND TYPES) |
| 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 |
| BR-BX11V1-12V | 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
發布緊急采購，3分鐘左右您將得到回復。