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参数资料
| 型号： | LTC3550EDHC-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER BATT DUAL 16-DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4.3 V ~ 8 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFDFN 裸露焊盘 |
| 供应商设备封装： | 16-DFN（5x3） |
| 包装： | 带卷 (TR) |
LTC3550-1
Dual Input USB/AC Adapter
Li-Ion Battery Charger with
600mA Buck Converter
FEATURES
DESCRIPTIO
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Charges Single-Cell Li-Ion Batteries from Wall
Adapter and USB Inputs
Automatic Input Power Detection and Selection
Charge Current Programmable Up to 950mA from
Wall Adapter Input
High Ef?ciency 600mA Synchronous DC/DC
Converter
No External MOSFET, Sense Resistor or Blocking
Diode Needed
Thermal Regulation Maximizes Charge Rate Without
Risk of Overheating*
Preset Charge Voltage with ±0.6% Accuracy
Programmable Charge Current Termination
1.5MHz Constant Frequency Operation (Step-Down
Converter)
18μA USB Suspend Current in Shutdown
Independent “Power Present” Status Outputs
Charge Status Output
Automatic Recharge
Available in a Thermally Enhanced, Low Pro?le
(0.75mm) 16-Lead (5mm x 3mm) DFN Package
The LTC ? 3550-1 is a standalone linear charger with a
600mA monolithic synchronous buck converter. It is
capable of charging a single-cell Li-Ion battery from both
wall adapter and USB inputs. The charger automatically
selects the appropriate power source for charging.
Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The ?oat voltage is ?xed at 4.2V and the charge currents
are programmed with external resistors. The LTC3550-1
terminates the charge cycle when the charge current drops
below the programmed termination threshold after the
?nal ?oat voltage is reached. With power applied to both
inputs, the LTC3550-1 can be put into shutdown mode
reducing the DCIN supply current to 20μA, the USBIN
supply current to 10μA, and the battery drain current to
less than 2μA.
The synchronous buck converter generates a ?xed output
voltage of 1.875V. The switching frequency is internally
set at 1.5MHz, allowing the use of small surface mount
inductors and capacitors.
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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Cellular Telephones
*Protected by U.S. patents, includng 6522118, 6700364, 6580258, 5481178, 6304066,
6127815, 6498466, 6611131
TYPICAL APPLICATIO
Dual Input Battery Charger and DC/DC Converter
Complete Charge Cycle (1100mA Battery)
1000
800
600
C OUT
WALL
ADAPTER
USB
PORT
1 μ F
1 μ F
2k
1%
1.24k
1%
LTC3550-1
RUN SW
DCIN V OUT
USBIN V CC
IUSB BAT
IDC ITERM
GND
2.2 μ H
800mA (WALL)
500mA (USB)
4.7 μ F
2k +
1%
V OUT
1.875V
600mA
10 μ F
CER
4.2V
SINGLE-CELL
Li-Ion BATTERY
3550-1 TA01
400
200
0
4.2
4.0
3.8
3.6
3.4
5.0
2.5
0
–2.5
0
0.5
1.0
CONSTANT VOLTAGE
USBIN = 5V
T A = 25 ° C
R IDC = 1.25k
R IUSB = 2k
2.0
1.5
2.5
3.0
TIME (HR)
3550-1 TA02
35501f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3552 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter |
| LTC3552-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter |
| LTC3552EDHC | 制造商:LINER 制造商全称:Linear Technology 功能描述:Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter |
| LTC3552EDHC#PBF | 功能描述:IC CHARGER BATT LI-ION 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
| LTC3552EDHC#TRPBF | 功能描述:IC CHARGER BATT LI-ION 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:61 系列:- 功能:电源管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:4.35 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:22-WFDFN 裸露焊盘 供应商设备封装:22-DFN（6x3）裸露焊盘 包装:管件 |
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