EmbeddedRelated.com
    Parts    LTC4120EUD#PBF
LTC4120EUD#PBF

ADILTC4120EUD#PBF

Analog Devices Inc.
Charger IC Multi-Chemistry 16-QFN (3x3)
NRND254 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The LTC4120 is a constant-current/constant-voltage wireless receiver and battery charger designed to provide up to 400mA of charge current. It features a wide input voltage range up to 40V and utilizes Dynamic Harmonization Control (DHC) to optimize wireless power transfer efficiency across varying coupling conditions.

Why Choose This Part

The device supports multiple battery chemistries with a programmable float voltage up to 11V, offering high flexibility for various pack configurations. Its DHC technology allows for a wide mechanical tolerance between the transmit and receive coils without overheating the receiver.

Applications

Wireless Battery Charging
Ideal for charging Li-Ion, LiFePO4, or lead-acid batteries in environments where physical connectors are impractical or unreliable.
Industrial Handhelds
Enables sealed enclosures for ruggedized devices that require protection against dust and moisture.
Medical Devices
Suitable for sterilized medical equipment where exposed charging contacts are prohibited.

Key Specifications

Mounting Type Surface Mount
Package / Case 16-WFQFN Exposed Pad
Battery Chemistry Multi-Chemistry
Current - Charging Constant - Programmable
Battery Pack Voltage 11V
Charge Current - Max 400mA
Operating Temperature -40degC ~ 125degC (TJ)
Voltage - Supply (Max) 40V
Supplier Device Package 16-QFN (3x3)

Getting Started

To evaluate this IC, use the DC1969A-B demonstration circuit which includes both the LTC4120 receiver and a basic wireless transmitter. Design requires careful selection of the receive resonant tank components (coil and capacitors) to match the intended transmission frequency.

Also Consider

BQ51013B TITexas Instruments - An alternative Qi-compliant wireless power receiver for designs requiring standard interoperability up to 5W.