LTC4125
RECOMMENDED FOR NEW DESIGNS5W AutoResonant Wireless Power Transmitter
- Part Models
- 4
- 1ku List Price
- Starting From $6.05
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 4
Technical Articles 4
Video 1
Product Selector Card 1
Brochure 1
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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4125EUFD#PBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4125EUFD#TRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4125IUFD#PBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4125IUFD#TRPBF | 20-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC4125EUFD#PBF | PRODUCTION | |
| LTC4125EUFD#TRPBF | PRODUCTION | |
| LTC4125IUFD#PBF | PRODUCTION | |
| LTC4125IUFD#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Charger ICs 1 | ||
|
LTC4120 LTC4120-4.2 |
Wireless Power Receiver and 400mA Buck Battery Charger |
|
Evaluation Kits
Wireless Power Transfer Demonstration Kit featuring the LTC4125EUFD and the LTC4120EUD
Resources
LTC4124/LTC4125, 100mA Wireless Li-Ion Charger Demonstration Kit
Resources
650mA Wireless Battery Charger Demonstration Kit
Resources
LTC4124/LTC4125, 50mA Wireless Li-Ion Charger Demonstration Kit