Datasheet > LTC4120_15

LTC4120_15

更新时间： 2024-09-25 01:22:31

品牌	Logo	应用领域
凌特 - Linear		电池无线
页数	文件大小	规格书
32页	786K
描述
Wireless Power Receiver and 400mA Buck Battery Charger

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中文翻译

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数据手册

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LTC4120_15 数据手册

LTC4120/LTC4120-4.2

Wireless Power Receiver and

400mA Buck Battery Charger

FeaTures

DescripTion

The LTC^®4120 is a constant-current/constant-voltage wire-

less receiver and battery charger. An external program-

ming resistor sets the charge current up to 400mA. The

LTC4120-4.2 is suitable for charging Li-Ion/Polymer bat-

teries,whiletheprogrammablefloatvoltageoftheLTC4120

accommodates several battery chemistries. The LTC4120

usesaDynamicHarmonizationControl(DHC)techniquethat

allowshighefficiencycontactlesschargingacrossanairgap.

Dynamic Harmonization Control Optimizes

Wireless Charging Over a Wide Coupling Range

Wide Input Voltage Range (12.5V to 40V)

Adjustable Float Voltage (3.5V to 11V)

Fixed 4.2V Float Voltage Option (LTC4120-4.2)

50mA to 400mA Charge Current Programmed with a

Single Resistor

1% Feedback Voltage Accuracy

Programmable 5% Accurate Charge Current

No Microprocessor Required

The LTC4120 regulates its input voltage via the DHC pin.

This technique modulates the resonant frequency of a

receiver tank to automatically adjust the power received

as well as the power transmitted to provide an efficient

solution for wirelessly charging battery-powered devices.

No Transformer Core

Thermally Enhanced, Low Profile 16-Lead

(3mm × 3mm × 0.75mm) QFN Package

Wireless charging with the LTC4120 provides a method

to power devices in harsh environments without requiring

expensive failure-prone connectors. This allows products

to be charged while locked within sealed enclosures, or

in moving or rotating equipment, or where cleanliness or

sanitation is critical.

applicaTions

Handheld Instruments

Industrial/Military Sensors and Devices

Harsh Environments

Portable Medical Devices

This full featured battery charger includes accurate RUN

pinthreshold,lowvoltagebatterypreconditioningandbad

battery fault detection, timer termination, auto-recharge,

and NTC temperature qualified charging. The FAULT pin

providesanindicationofbadbatteryortemperaturefaults.

Physically Small Devices

Electrically Isolated Devices

L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks

of Linear Technology Corporation. All other trademarks are the property of their respective

owners.

Once charging is terminated, the LTC4120 signals end-of-

charge via the CHRG pin, and enters a low current sleep

mode. An auto-restart feature starts a new charging cycle

if the battery voltage drops by 2.2%.

Typical applicaTion

Wireless Rx Voltage/Charge Current vs Spacing

26.7nF

400

333

267

200

133

RUN

INTV

FREQ

BOOST

CHARGE

MAX

2.2µF

22nF 33µH

10µF

LTC4120

6.5nF

47µH

NOT

Tx CIRCUITRY

5µH

DHC

CHGSNS

NTC

CHARGING

FAULT

CHRG

BAT

1.01M

1.35M

Li-Ion

4.2V

CHARGING

GND PROG FBG

3.01k

22µF

0.4 0.6

0.8 1.0 1.2

SPACING (cm)

1.4

1.6 1.8

4120 TA01a

4120 TA01b

4120fe

For more information www.linear.com/LTC4120

12 3 4 5 6 7...32

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与LTC4120_15相关器件

型号	品牌	获取价格	描述	数据表
LTC4120-4.2	ADI	获取价格	Wireless Power Receiver and 400mA Buck Battery Charger
LTC4120-4.2_15	Linear	获取价格	Wireless Power Receiver and 400mA Buck Battery Charger
LTC4120EUD	Linear	获取价格	Wireless Power Transfer Battery Charger Demonstration Kit
LTC4120EUD#PBF	Linear	获取价格	LTC4120/LTC4120-4.2 - Wireless Power Receiver and 400mA Buck Battery Charger; Package: QFN
LTC4120EUD-4.2	Linear	获取价格	Wireless Power Receiver and 400mA Buck Battery Charger
LTC4120EUD-4.2#PBF	Linear	获取价格	LTC4120/LTC4120-4.2 - Wireless Power Receiver and 400mA Buck Battery Charger; Package: QFN
LTC4121	Linear	获取价格	40V 400mA Synchronous Step-Down Battery Charger
LTC4121	ADI	获取价格	40V 400mA 同步降压型电池充电器
LTC4121_15	Linear	获取价格	40V 400mA Synchronous Step-Down Battery Charger
LTC4121-4.2	Linear	获取价格	40V 400mA Synchronous Step-Down Battery Charger

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