音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LT1239CS Datasheet

  • LT1239CS

  • Backup Battery Management Circuit

  • 249.99KB

  • 12頁(yè)

  • LINER

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書(shū)

PDF預(yù)覽

LT1239
Backup Battery
Management Circuit
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTION
The LT
廬
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-
, LTC and LT are registered trademarks of Linear Technology Corporation.
Micropower Operation (I
Q
= 20
碌
A)
Adjustable Regulator for Battery Charging
4.85V Regulator for Battery Regulation
Cell Voltage Equalization in 2-Cell Systems
Low-Battery Detector Protects Lithium Cells
Comparator for Automatic Power Switching
Shutdown
Output Current Sensing
Current and Thermal Limiting
Reverse Output Protection
16-Pin SO Package
Operates on 7V to 30V Input
APPLICATIONS
s
s
s
Backup Battery Management Systems for Portable
Computers
Lithium-Ion Backup Systems
NiCd Backup Systems
TYPICAL APPLICATION
Lithium-Ion Backup System
120鈩? 120鈩?
10
INPUT 2
OUT 1
14
MAIN
BATTERY
PACK
7V TO 24V
INPUT 1
REGULATOR
#1
16
1
15
7
681k
1%
8
3.4V
Li-Ion
CELL
13
5V SYSTEM
POWER
69.8k
1%
3.4V
Li-Ion
CELL
300pF
ADJ
I
MON1
E/A (IN)
INPUT 2
GND
IN
LOW-BATTERY
DETECT
GND
4
GND
INPUT 1
5
IN
REGULATOR
#2
OUT
604k
1%
+
22碌F
3
SHDN1
2
E/A (OUT)
5V
IN
GND
+
鈥?/div>
GND
OUT 2
12
MEMORY
POWER
MANAGEMENT
* REQUIRED BY SOME SAFETY AGENCIES
SEE APPLICATIONS INFORMATION
FOR INFORMATION ON
SELECTING VALUES.
LTC1239 鈥?TA01
6
SHDN2
I
MON2
11
U
+
鈥?/div>
U
U
+
22碌F
1

LT1239CS相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠(chǎng)商
    下載
  • 英文版
    Sharp Electrionic Components [Hall Voltage 160mV GaAs Hall ...
    SHARP
  • 英文版
    Seoul Semiconductor [RED OVAL LAMP LED]
    SEOUL
  • 英文版
    Linear Technology [5 Volt, 3 Amp Voltage Regulator]
    LINER
  • 英文版
    Low Power High Speed Operational Amplifier
    Linear
  • 英文版
    Low Power High Speed Operational Amplifier
    Linear
  • 英文版
    Dual and Quad 1mA, 12MHz, 50V/ms Op Amps
    Linear
  • 英文版
    Dual and Quad 1mA, 12MHz, 50V/s Op Amps
    Linear
  • 英文版
    Dual and Quad 1mA, 12MHz, 50V/ms Op Amps
    Linear
  • 英文版
    Dual and Quad 1mA, 12MHz, 50V/s Op Amps
    Linear
  • 英文版
    150MHz Video Multiplexers
    LINER
  • 英文版
    150MHz Video Multiplexers
    Linear
  • 英文版
    150MHz Video Multiplexers
    Linear
  • 英文版
    4-Input Video Multiplexer with 75MHz Current Feedback Amplif...
    LINER
  • 英文版
    4-Input Video Multiplexer with 75MHz Current Feedback Amplif...
    Linear
  • 英文版
    4-Input Video Multiplexer with 75MHz Current Feedback Amplif...
    Linear
  • 英文版
    150MHz Video Multiplexers
    LINER
  • 英文版
    150MHz Video Multiplexers
    Linear
  • 英文版
    150MHz Video Multiplexers
    Linear
  • 英文版
    250mA/60MHz Current Feedback Amplifier
    LINER
  • 英文版
    250mA/60MHz Current Feedback Amplifier
    Linear

掃碼下載APP，
一鍵連接廣大的電子世界。

在線(xiàn)人工客服

買(mǎi)家服務(wù)：
賣(mài)家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線(xiàn)時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見(jiàn)，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見(jiàn)一經(jīng)采納，將有感恩紅包奉上哦！