LTC4085EDE-1-TRPBF

更新时间： 2024-11-07 05:43:59

品牌	Logo	应用领域
凌特 - Linear		电池二极管控制器
页数	文件大小	规格书
24页	298K
描述
USB Power Manager with Ideal Diode Controller and 4.1V Li-Ion Charger

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LTC4085-1

USB Power Manager with

Ideal Diode Controller and

4.1V Li-Ion Charger

FEATURES

DESCRIPTIO

■

Seamless Transition Between Input Power Sources:

The LTC^®4085-1 is a USB power manager and Li-Ion

battery charger designed for portable battery-powered

applications. The part controls the total current used by

the USB peripheral for operation and battery charging.

The total input current can be limited to 20% or 100%

of a programmed value up to 1.5A (typically 100mA or

500mA). Battery charge current is automatically reduced

such that the sum of the load current and charge current

does not exceed the programmed input current limit.

Li-Ion Battery, USB and 5V Wall Adapter

■

215mΩ Internal Ideal Diode Plus Optional External

IdealDiodeControllerProvideLowLossPowerPath^TM

When Wall Adapter/USB Input Not Present

■

Load Dependent Charging Guarantees Accurate USB

Input Current Compliance

■

4.1V Float Voltage Improves Battery Life Span and

High Temperature Safety Margin

■

Constant-Current/Constant-Voltage Operation with

The LTC4085-1 includes a complete constant-current/

constant-voltagelinearchargerforsinglecellLi-Ionbatter-

ies. This 4.1V version of the standard LTC4085 is intended

for applications which will be operated or stored above

approximately 60°C. Under these conditions, a reduced

ﬂoatvoltagewilltrade-offinitialcellcapacityforthebeneﬁt

ofincreasedcapacityretentionoverthelifeofthebattery.A

reduced ﬂoat voltage also minimizes swelling in prismatic

and polymer cells, and avoids open CID (pressure fuse)

in cylindrical cells.

Thermal Feedback to Maximize Charging Rate Without

Risk of Overheating*

■

Selectable 100% or 20% Input Current Limit

(e.g., 500mA/100mA)

■

Battery Charge Current Independently Programmable

Up to 1.2A

■

Preset 4.1V Charge Voltage with 0.8% Accuracy

■

C/10 Charge Current Detection Output

■

^{Tiny (4mm × 3m}U^{m × 0.75mm) 14-Lead DFN Package}

APPLICATIO S

The LTC4085-1 also includes a programmable termina-

tion timer, automatic recharging, an end-of-charge status

output and an NTC thermistor.

■

Portable USB Devices: Cameras, MP3 Players, PDAs

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

PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents, including 6522118, 6700364.

Other patents pending.

The LTC4085-1 is available in a 14-lead low proﬁle 4mm

× 3mm DFN package.

TYPICAL APPLICATIO

LOAD

Input and Battery Current vs Load Current

R_PROG= 100k, R_CLPROG= 2k

5V WALL

ADAPTER

INPUT

TO LDOs,

REGs, ETC

600

4.7μF

510Ω

5V (NOM)

500

400

300

200

100

FROM USB

WALL

ACPR

OUT

CABLE V

BUS

SUSPEND USB POWER

100mA 500mA SELECT

SUSP

HPWR

4.7μF

LOAD

LTC4085-1

PROG

GATE

BAT

(CHARGING)

CLPROG

NTC

BAT

CHRG

TIMER

BAT

(DISCHARGING)

GND

WALL = 0V

100

NTC

BAT

–100

300 500

400

(mA)

600

200

10k

LOAD

OPTIONAL - TO LOWER

IDEAL DIODE IMPEDANCE

40851 TA01b

0.1μF

100k

10k

40851 TA01

40851f

12 3 4 5 6 7...24

中文翻译

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与LTC4085EDE-1-TRPBF相关器件

型号	品牌	获取价格	描述	数据表
LTC4085EDE-3#PBF	Linear	获取价格	LTC4085-3/-4 - USB Power Manager with Ideal Diode Controller and 3.95V Li-Ion Charger; Pac
LTC4085EDE-4#PBF	Linear	获取价格	LTC4085-3/-4 - USB Power Manager with Ideal Diode Controller and 3.95V Li-Ion Charger; Pac
LTC4085EDE-4#TRPBF	Linear	获取价格	LTC4085-3/-4 - USB Power Manager with Ideal Diode Controller and 3.95V Li-Ion Charger; Pac
LTC4085EDE-PBF	Linear	获取价格	USB Power Manager with Ideal Diode Controller and Li-Ion Charger
LTC4085EDE-TRPBF	Linear	获取价格	USB Power Manager with Ideal Diode Controller and Li-Ion Charger
LTC4088	Linear	获取价格	High Effi ciency Battery Charger/USB Power Manager
LTC4088	ADI	获取价格	高效率电池充电器 / USB 电源管理器
LTC4088_12	Linear	获取价格	High Efficiency Battery Charger/USB Power Manager
LTC4088-1	Linear	获取价格	High Effi ciency Battery Charger/USB Power Manager with Regulated Output Voltage
LTC4088-1	ADI	获取价格	具已调输出电压的高效率电池充电器 / USB 电源管理器

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