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參數資料
| 型號： | bq2040 |
| 廠商： | Benchmark Technology Group |
| 英文描述： | Gas Gauge IC With SMBus Interface(氣體Gauge芯片（帶SMBus 接口）) |
| 中文描述： | 氣體計IC，帶有SMBus接口（氣體計芯片（帶的SMBus接口）） |
| 文件頁數： | 1/32頁 |
| 文件大小： | 189K |
| 代理商： | BQ2040 |
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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
Monitors charge FET in Li-Ion
pack protection circuit
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 four-segment LED dis-
play for remaining capacity
indication
16-pin narrow SOIC
General Description
The bq2040 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
bq2040 directly supports capacity
monitoring for NiCd, NiMH, and Li-
Ion battery chemistries.
The bq2040 uses the System Man-
agement Bus v1.0 (SMBus) protocol
and supports the Smart Battery
Data (SBData) commands. The
bq2040 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 four-segment LED
display to graphically depict battery
full-to-empty in 25% increments.
Battery
The bq2040 estimates battery self-
discharge based on an internal
timer and temperature sensor and
user-programmable rate informa-
tion stored in external EEPROM.
The bq2040 also automatically re-
calibrates or “learns” battery capac-
ity in the full course of a discharge
cycle from full to empty.
The bq2040 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 configu-
rations.
An external EEPROM is used to
program initial values into the
bq2040 and is necessary for proper
operation.
bq2040
Gas Gauge IC With SMBus Interface
V
CC
3.0–6.5V
ESCL
EEPROM clock
ESDA
EEPROM data
LED
1-4
LED segment 1-4
V
SS
System ground
SR
Sense resistor input
DISP
Display control input
1
PN204001.eps
16-Pin Narrow SOIC
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VCC
ESCL
ESDA
LED1
LED2
LED3
LED4
VSS
VOUT
REF
SMBC
SMBD
PSTAT
SB
DISP
SR
SB
Battery sense input
PSTAT
Protector status input
SMBD
SMBus data input/output
SMBC
SMBus clock
REF
Voltage reference output
V
OUT
EEPROM supply output
SLUS005–JUNE 1999 E
Pin Connections
Pin Names
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相關代理商/技術參數 |
參數描述 |
|---|---|
| BQ2040EVM-001 | 功能描述:電源管理IC開發工具 Eval Kit for NiMH 10.8V 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 |
| BQ2040SN | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Gas Gauge IC With SMBus Interface |
| BQ2040SN | 制造商:Texas Instruments 功能描述:BATTERY CHARGE MONITOR SMD 2040 |
| BQ2040SN-C408 | 功能描述:電池管理 Multi-Chemistry SBS 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 |
| BQ2040SN-C408 | 制造商:Texas Instruments 功能描述:Battery Management IC |
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