Complete Wireless Charging le & p m i S pact Com 3V –5VIN Foreign Object Detection LTC4125 LTC4120 Transmitter Receiver Reliable Charging Tolerant of Coil Coupling Misalignment The LTC®4125 wireless power transmitter brings a new level of performance and simplicity to the transfer of up to 5W of power wirelessly to an electrically isolated receiver capable of that power level. It is a monolithic driver that controls the current flow in a series-connected transmit coil LC network. The LTC4125 features auto-resonant switching, allowing it to automatically adjust its driving frequency to match the LC network resonant frequency. It also implements foreign object detection, and auto-resonant switching improves performance with mismatched resonant components and poorly coupled coils. The LTC4125 completes a simple wireless power solution when combined with one of Linear’s wireless power receiver ICs. Power Transfer vs. Alignment Features • Uses Standard Coils • Auto-Resonant Switching Frequency Adjusts to Resonant Capacitor & Transmit Coil Inductance • Transmit Power Automatically Adjusts to Receiver Load • Integrated 100mΩ Full Bridge Switches • Foreign Object Detection • 4mm x 5mm QFN-20 Package (For LTC4125/4120 System) 20.0 Z Transmit Distance (mm) www.linear.com/product/LTC4125 Full power (1.68W) 1-800-4-LINEAR 1/2 power (0.84W) 15.0 Info & Free Samples 10.0 5.0 0.0 0 5 10 15 X,Y OFFSET (mm) 20 , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.