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Overview
Features and Benefits
- Monolithic 5W Wireless Power Transmitter
- AutoResonant™ Switching Frequency Adjusts to Resonant Capacitance and Transmit Coil Inductance*
- Transmit Power Automatically Adjusts to Receiver Load*
- Input Voltage Range: 3V to 5.5V
- Integrated 100mΩ Full Bridge Switches
- Multiple Foreign Object Detection Methods
- Programmable Average Input Current Limit and Monitor
- NTC Input for System/Component Temperature Qualified Power Transfer
- Wide Operating Switching Frequency Range: 50kHz to 250kHz
- Thermally Enhanced 4mm × 5mm QFN 20-Lead Package
Product Details
The LTC4125 is a simple and high performance monolithic full bridge resonant driver capable of delivering over 5W of power wirelessly to a properly tuned receiver. The device controls the current flow in a series connected transmit coil LC network to create a simple, safe and versatile wireless power transmitter.
The LTC4125 automatically adjusts its driving frequency to match the LC network resonant frequency. This AutoResonant switching allows the device to deliver maximum power from a low voltage input supply (3V to 5.5V) to a tuned receiver. To optimize system efficiency, the LTC4125 employs a periodic transmit power search and adjusts the transmission power based on the receiver load requirements. The device stops delivering power during a fault condition, or if a foreign object is detected.
The LTC4125 also includes a programmable maximum average input current limit and an NTC input as additional means for foreign object and overload protection. The LTC4125 is available in a 20-lead low profile (0.75mm) 4mm × 5mm QFN package.
Applications
- Hermetically and/or Electrically Insulated Devices
- Military Sensors and Devices
- Medical Equipment
- Industrial Handhelds
Product Categories
Markets and Technologies
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (4)
Reference Materials
Product Selector Card (1)
Solutions Bulletins & Brochures (1)
5W Full Bridge AutoResonant Transmitter IC Simplify Wireless Power Design
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Support & Discussions
LTC4125 Discussions
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Sampling:
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.