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參數(shù)資料
| 型號： | LTC1980 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | RS-232 |
| 英文描述： | 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors |
| 中文描述： | 5V的高速RS - 232收發(fā)器與0.1uF電容 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 463K |
| 代理商： | LTC1980 |
LTC1980
1
1980i
I
Digital Cameras
I
Handheld Computers
I
Personal Digital Assistants
I
1W to 10W Uninterruptable Power Supplies
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Final Electrical Specifications
APPLICATIU
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
Combination Battery
Charger and DC/DC Converter
May 2003
The LTC
1980 integrates PWM power control for charg-
ing a battery and converting the battery voltage to a
regulated output or simultaneously charging the battery
while powering system load from an unregulated AC wall
adapter. Combining these features into a single IC pro-
duces a smaller area and lower cost solution compared to
presently available multi-IC solutions. The LTC1980 shares
the discrete components for both the battery charger and
the DC/DC converter thus minimizing size and cost relative
to dual controller solutions. Both the battery charger and
DC/DC converter use a current mode flyback topology for
high efficiency and excellent transient response. Optional
Burst Mode operation and power-down mode allow power
density, efficiency and output ripple to be tailored to the
application.
The LTC1980 provides a complete Li-Ion battery charger
with charge termination timer, preset Li-Ion battery volt-
ages, overvoltage and undervoltage protection, and user-
programmable constant-current charging. Automatic bat-
tery recharging, shorted-cell detection, and open-drain
C
/10 and wall plug detect outputs are also provided. User
programming allows NiMH and NiCd battery chemistries
to be charged as well.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
I
Single Controller IC Includes Battery Charger
Plus DC/DC Converter
I
Wall Adapter Voltage May be Above or Below
Battery Voltage
I
LDO Controller Allows Simultaneous Charging
and Regulating from Wall Adapter Input
I
Standalone Li-Ion Battery Charger Including Charge
Termination, Overvoltage Protection, Shorted-Cell
Detection and Battery Recharge
I
Selectable 4.1V, 4.2V, 8.2V and 8.4V Float Voltages
I
Simple NiMH and NiCd Battery Charger
I
Pin Programmable Regulator Burst Mode
Operation
and Shutdown for High Efficiency
I
High Efficiency Current Mode 300kHz PWM
I
Reduced Component Architecture
I
Undervoltage Protection and Soft-Start Insures
Start-Up with Current Limited Wall Adapter
I
Small 24-Pin SSOP Package
LTC1980
Li-Ion
BATTERY
POWER FLOW
CHARGING
BATTERY
OPERATION
SYSTEM
POWER
LDO/
SWITCH
3.3V
UNREGULATED
WALL ADAPTER
INPUT (3V TO 10V)
1.8V
1.5V
1980 TA01
SYSTEM LOAD
DC/DC
CONVERTERS
BAT-FET
REG-FET
Li-Ion Charger and DC/DC Converter Using One IC
LOAD CURRENT (mA)
10
E
90
85
80
75
70
65
60
100
1000
1980 G04
V
BAT
= 3.6V
T
= 25
°
C
FIGURE 5
3.3V Regulator Efficiency vs Load Current
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| LTC1980EGN | 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1980EGN#PBF | 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1980EGN#TR | 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1980EGN#TRPBF | 功能描述:IC PWM BATT CHARGER/CONV 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| LTC1981ES5 | 制造商:Linear Technology 功能描述:MOSFET DRVR 1-OUT Hi Side 5-Pin TSOT-23 |
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