LTC3550EDHC-1#TR

更新时间： 2024-09-24 13:09:51

品牌	Logo	应用领域
凌特 - Linear		电池
页数	文件大小	规格书
24页	344K
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LTC3550EDHC-1#TR 数据手册

LTC3550-1

Dual Input USB/AC Adapter

Li-Ion Battery Charger with

600mA Buck Converter

DESCRIPTIO

FEATURES

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.

■

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 Efﬁciency 600mA Synchronous DC/DC

Internal thermal feedback regulates the battery charge

currenttomaintainaconstantdietemperatureduringhigh

power operation or high ambient temperature conditions.

The ﬂoat voltage is ﬁxed at 4.2V and the charge currents

are programmed with external resistors. The LTC3550-1

terminatesthechargecyclewhenthechargecurrentdrops

below the programmed termination threshold after the

ﬁnal ﬂoat 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.

Converter

■

No External MOSFET, Sense Resistor or Blocking

Diode Needed

■

Thermal Regulation Maximizes Charge Rate Without

Risk of Overheating*

■

Preset Charge Voltage with 0.6ꢀ 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

■

The synchronous buck converter generates a ﬁxed output

voltage of 1.875V. The switching frequency is internally

set at 1.5MHz, allowing the use of small surface mount

inductors and capacitors.

, LTC and LT are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

*Protected by U.S. patents, includng 6522118, 6700364, 6580258, 5481178, 6304066,

6127815, 6498466, 6611131

Available in a Thermally Enhanced, Low Proﬁle

(0.75mm) 16-Lead (5mm x 3mm) DFN Package

APPLICATIO S

■

Cellular Telephones

TYPICAL APPLICATIO

Complete Charge Cycle (1100mA Battery)

1000

800

600

400

200

4.2

4.0

3.8

3.6

3.4

Dual Input Battery Charger and DC/DC Converter

LTC3550-1

RUN SW

2.2µH

OUT

1.875V

600mA

WALL

CONSTANT VOLTAGE

USBIN = 5V

OUT

ADAPTER

DCIN

USBIN

IUSB

IDC

OUT

10µF

800mA (WALL)

500mA (USB)

CER

USB

PORT

= 25°C

IDC

1µF

BAT

= 1.25k

= 2k

4.7µF

IUSB

ITERM

5.0

2.5

4.2V

1µF

GND

1.24k

SINGLE-CELL

Li-Ion BATTERY

–2.5

3550-1 TA01

0.5

1.0

1.5

2.0

2.5

3.0

TIME (HR)

3550-1 TA02

35501f

12 3 4 5 6 7...24

中文翻译

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与LTC3550EDHC-1#TR相关器件

型号	品牌	获取价格	描述	数据表
LTC3550EDHC-1#TRPBF	Linear	获取价格	LTC3550-1 - Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter; Pa
LTC3552	Linear	获取价格	Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
LTC3552	ADI	获取价格	独立型线性锂离子电池充电器和双通道同步降压型转换器
LTC3552-1	Linear	获取价格	Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
LTC3552-1	ADI	获取价格	独立型线性锂离子电池充电器和双通道同步降压型转换器
LTC3552EDHC	Linear	获取价格	Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
LTC3552EDHC-1	Linear	获取价格	Standalone Linear Li-Ion Battery Charger and Dual Synchronous Buck Converter
LTC3553	ADI	获取价格	具锂离子电池充电器、LDO 和降压型稳压器的微功率 USB 电源管理器
LTC3553-2	Linear	获取价格	Micropower USB Power Manager with Li-Ion Charger, Always-On LDO and Buck Regulator
LTC3553-2	ADI	获取价格	具锂离子电池充电器、始终保持接通的 LDO 和降压型稳压器的微功率 USB 电源管理器

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