Solutions Search - Wireless Power Transfer Solutions

Wireless power transfer (WPT) is an inductive wireless power system consisting of transmitter electronics, transmit coil, receive coil and receiver electronics. The LTC4120 based resonant coupled system uses dynamic harmonization control (DHC) to optimize power transfer and provide overvoltage protection. This eliminates both the need for precise mechanical alignment between the transmit and receive coils as well as the need for a coupling core. The LTC4120 wireless buck charger forms the basis for the receiver electronics. The receive coil can be integrated into the receiver electronics PCB. In collaboration with PowerbyProxi, Linear Technology offers several different transmitter electronics options. A reference design is available to build a basic transmitter, while several more advanced transmitters can be purchased from PowerbyProxi, www.powerbyproxi.com.

Doubling the LTC4120 Wireless Power Receiver for Higher Battery Charge Current

Andy Bishop - Design Engineer
Gabino Alonso - Strategic Marketing Engineer Aug 27th 2014
The LTC4120 is a constant-current/constant-voltage wireless receiver and battery charger. The charge current is programmed up to 400mA with an external resistor. If more than 400mA is required, then use two LTC4120 devices operating in parallel as shown in this schematic. In this case the two LTC4120 operate from one transmitter ...

 

LTC3331 Wireless Battery Charger

Jun 9th 2014
The LTC®3331 integrates a high voltage energy harvesting power supply plus a buck-boost DC/DC powered from a rechargeable battery to create a single output supply for alternative energy applications. A 10mA shunt allows simple charging of the battery with harvested energy while a low battery disconnect function protects ...

 

Frequently Asked Questions: Wireless Power Transfer (WPT) & LTC4120

Trevor Barcelo - Product Line Manager - Battery Management Oct 31st 2013
Q. What is wireless power transfer (WPT)? A. Wireless Power Transfer (WPT) is the process where electrical energy is transmitted from a power source to an electrical load across an air gap using induction coils. These coils produce an electromagnetic field which sends energy from a charging base station (transmitter) to a coil ...