- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385499 > LT1239 (Linear Technology Corporation) Backup Battery Management Circuit(后備電池管理電路) PDF資料下載
參數(shù)資料
| 型號(hào)： | LT1239 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Backup Battery Management Circuit(后備電池管理電路) |
| 中文描述： | 備份電池管理電路（后備電池管理電路） |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 211K |
| 代理商： | LT1239 |
1
LT1239
Backup Battery
Management Circuit
I
Micropower Operation (I
Q
= 20
μ
A)
I
Adjustable Regulator for Battery Charging
I
4.85V Regulator for Battery Regulation
I
Cell Voltage Equalization in 2-Cell Systems
I
Low-Battery Detector Protects Lithium Cells
I
Comparator for Automatic Power Switching
I
Shutdown
I
Output Current Sensing
I
Current and Thermal Limiting
I
Reverse Output Protection
I
16-Pin SO Package
I
Operates on 7V to 30V Input
The LT
1239 is a micropower backup battery manage-
ment system for portable computers and instrumenta-
tion. It contains two regulators for regulating the battery
voltage and memory voltage and a comparator for switch-
ing between main power and backup power. The first
regulator provides a constant voltage charge for the
backup batteries and is adjustable from 3.75V up to 20V.
An equalization amplifier combined with the first regulator
provides precision charge equalization for a 2-cell
lithium-ion system. A second regulator with 4.85V output
provides a regulated backup battery voltage to the memory
when main power is lost. The second regulator also
isolates the backup battery from the main 5V supply
during normal operation when the memory is being pow-
ered by the 5V supply.
A comparator is included which provides automatic
switchover from main 5V power to backup power ensur-
ing uninterrupted power for memory and power monitor-
FEATURES
DESCRIPTIO
N
U
I
Backup Battery Management Systems for Portable
Computers
I
Lithium-Ion Backup Systems
I
NiCd Backup Systems
APPLICATIO
S
U
TYPICAL APPLICATIO
N
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
Lithium-Ion Backup System
604k
1%
69.8k
1%
681k
1%
22
μ
F
3.4V
Li-Ion
CELL
3.4V
Li-Ion
CELL
E/A (IN)
E/A (OUT)
5V
IN
OUT 1
ADJ
I
MON1
300pF
INPUT 2
120
* 120
*
INPUT 2
OUT 2
I
MON2
SHDN1
IN
MAIN
BATTERY
PACK
7V TO 24V
INPUT 1
22
μ
F
INPUT 1
SHDN2
OUT
IN
GND
GND
GND
GND
GND
*REQUIRED BY SOME SAFETY AGENCIES
SEE APPLICATIONS INFORMATION
FOR INFORMATION ON
SELECTING VALUES.
LTC1239 TA01
–
+
–
+
5V SYSTEM
POWER
MEMORY
POWER
MANAGEMENT
LOW-BATTERY
DETECT
+
+
11
1
7
8
15
16
13
12
10
2
4
5
6
14
3
REGULATOR
#1
REGULATOR
#2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1241 Series | High Speed Current Mode Pulse Width Modulators(高速，電流模式脈寬調(diào)制器) |
| LT1248 | Octal D-Type Transparent Latches with 3-state Outputs 20-SO 0 to 70 |
| LT1248C | Octal D-Type Transparent Latches with 3-state Outputs 20-SO 0 to 70 |
| LT1248CN | Octal D-Type Transparent Latches with 3-state Outputs 20-SO 0 to 70 |
| LT1248CS | Replaced by SN74ALS374A : Octal D-Type Edge Triggered Flip-Flops with 3-State Outputs 20-SSOP 0 to 70 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1239_02 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Backup Battery Management Circuit |
| LT1239CS | 功能描述:IC BATT BACKUP MNGMNT SYS 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:充電管理 電池化學(xué):鋰離子（Li-Ion）、鋰聚合物（Li-Pol） 電源電壓:3.75 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:669 (CN2011-ZH PDF) 其它名稱:MCP73831T-2ACI/OTCT |
| LT123A | 制造商:LINER 制造商全稱:Linear Technology 功能描述:5 Volt, 3 Amp Voltage Regulator |
| LT123AK | 制造商:LINER 制造商全稱:Linear Technology 功能描述:5 Volt, 3 Amp Voltage Regulator |
| LT123AK/883 | 制造商:Linear Technology 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。