LTC4124 查看數據表（PDF） - Analog Devices

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LTC4124

100mA Wireless Li-Ion Charger with Low Battery Disconnect

Analog Devices 

LTC4124

100mA Wireless Li-Ion Charger

with Low Battery Disconnect

FEATURES

nn Complete Wireless Power Receiver, Li-Ion Charger

and PowerPath™ Controller

nn Wireless Input Power Control and Rectification

nn Wideband Wireless Power Frequency: DC to >10MHz

nn Pin-Selectable Charge Current:

10mA/25mA/50mA/​100mA

nn Pin-Selectable Charge Voltage: 4.0V/4.1V/4.2V/4.35V

nn Pin-Selectable Low Battery Disconnect: 2.7V/3.2V

nn Zero Battery Drain Current in Disconnect/Ship Mode

nn Pin-Selectable Low Battery Pre-Charge Current Enable

nn NTC Input for Temperature Qualified Charging

nn Safety Charge Termination Timer

nn Tiny Total Solution Size with Few Externals

nn Small Thermally Enhanced 12-lead

2mm × 2mm LQFN Package

APPLICATIONS

nn Medical Wireless Sensors

nn Military Wearables

nn High End Wireless Headsets

nn Streaming Headsets with Bluetooth Connectivity

nn Virtual Reality Headsets

nn High End Remote Control

nn IoT Devices

DESCRIPTION

The LTC®4124 is a simple high performance wireless

Li-Ion charger with low battery disconnect. The pin-

selectable charge current (up to 100mA) and charge

voltage ensure versatility while minimizing the number

of required external components.

Wireless charging with the LTC4124 allows devices to be

charged while sealed within enclosures and eliminates

bulky connectors in space-constrained applications.

Elimination of exposed conductive connectors also cre-

ates more robust devices while ensuring an effortless

end-user experience.

The LTC4124 includes an NTC input for safe temperature

qualified charging and a battery disconnect feature that

prevents damage to a battery due to over-discharging.

The 2mm × 2mm LQFN package and minimal number of

external components make the LTC4124 well-suited for

low power portable applications where small solution size

is mandatory.

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

TYPICAL APPLICATION

10mA Wireless 4.2V Li-Ion Charger with 1mA Pre-Charge

Conditioning and 2.7V Low Battery Disconnect

IIN

AIR GAP

TX

CIRCUIT

ACIN

DCIN

VSEL2

LBSEL

ISEL1

ISEL2

GND

PRECHG

LTC4124 VSEL1

VCC

CHRG

BAT

NTC

IOUT

OUT

(OPTIONAL)

4124 TA01a

4.2V

100k

Top and Bottom View of the IC with

Complete Application Circuit Boards

TO BAT

Rev. A

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For more information www.analog.com

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