Datasheet > LTC4123

LTC4123

更新时间： 2024-01-23 16:28:23

品牌	Logo	应用领域
亚德诺 - ADI		无线
页数	文件大小	规格书
24页	1648K
描述
Wireless Li-Ion Charger with 1.2V Step-Down DC/DC Converter

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中文翻译

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LTC4123 数据手册

LTC4126-ADJ

Wireless Li-Ion Charger with

1.2V Step-Down DC/DC Converter

FEATURES

DESCRIPTION

The LTC^®4126-ADJ is a low-power wireless single-cell

Li-Ion battery charger with an integrated step-down DC/

DCregulator.Thestep-downregulatorisalow-noisemulti-

mode charge pump which is powered from the battery and

provides a regulated 1.2V at the output. The switching

frequency is set to either 50kHz or 75kHz depending on the

mode to keep any switching noise out of the audible range.

Wireless Li-Ion Battery Charger Plus High

Efficiency Multi-Mode Charge Pump DC/DC

Programmable Charge Current from 1mA to 50mA

Via an External Resistor

Wideband Rx Frequency: DC to >10MHz

Integrated Rectifier with Overvoltage Limit

Charge Voltage: 4.2V

Low Battery Disconnect: 3.0V

The constant-current constant-voltage Li-Ion battery

charger has automatic recharge, automatic termination

by safety timer, and battery temperature monitoring via

an NTC pin. Charge current is programmable from 1mA

to 50mA via an external resistor. Undervoltage protection

disconnects the battery from all loads when the battery

voltage is below 3.0V.

NTC Pin for Temperature Qualified Charging

DC/DC Regulated Output: 1.2V

DC/DC Output Current: Up to 60mA

50kHz/75kHz Switching, No Audible Noise

Pushbutton and/or Digital on/off Control for DC/DC

Thermally Enhanced 12-Lead 2mm × 2mm LQFN

Package

Thesmallpackageandminimalexternalcomponentcount

make the LTC4126-ADJ and its variants suitable for hear-

ing aid applications and other low power portable devices.

See the chart below.

APPLICATIONS

Hearing Aids

Low Power Li-Ion Powered Devices

Wireless Headsets

PARAMETER

LTC4126-ADJ

Programmable

6 Hours

LTC4126-10

10mA

3 Hours

4.1V/4.2V

Active Low

1MΩ

LTC4126

7.5mA

6 Hours

4.2V/4.35V

Active High

N/A

Charge Current

Charge Timer

Charge Voltage

EN Pin Polarity

EN Pin Pull-Up

IoT Wearables

4.2V

Active High

N/A

NTC Upper Threshold 76.5% of V

62% of V

3.5V

1.05V

1.7s

76.5% of V

3.2V

1.1V

LOBAT3

Threshold

Timing

1.1V

110ms

DC/DC

Mode 3

110ms

All registered trademarks and trademarks are the property of their respective owners.

Top and Bottom View of the IC with

Complete Application Circuit

TYPICAL APPLICATION

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Rev. 0

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中文翻译

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与LTC4123相关器件

型号	品牌	获取价格	描述	数据表
LTC4124	ADI	获取价格	Wireless Li-Ion Charger with 1.2V Step-Down DC/DC Converter
LTC4125	ADI	获取价格	5W AutoResonant 无线功率发送器
LTC4125EUFD	Linear	获取价格	Wireless Power Transfer Battery Charger Demonstration Kit
LTC4126	ADI	获取价格	Wireless Li-Ion Charger with 1.2V Step-Down DC/DC Converter
LTC4126-10	ADI	获取价格	Wireless Li-Ion Charger with 1.2V Step-Down DC/DC Converter
LTC4126-ADJ	ADI	获取价格	Wireless Li-Ion Charger with 1.2V Step-Down DC/DC Converter
LTC4150	Linear	获取价格	Coulomb Counter/ Battery Gas Gauge
LTC4150	ADI	获取价格	库仑计量器/电池电量测量芯片
LTC4150_1	Linear	获取价格	Coulomb Counter/ Battery Gas Gauge
LTC4150CMS	Linear	获取价格	Coulomb Counter/ Battery Gas Gauge

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