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Overview
| Topology | Wireless Power Transfer |
| Input voltage | 4.5-5.5 V |
| Switching frequency | 50-250 kHz |
Description
LTC4125 Driving a 24μH Transmit Coil at 103kHz, with 1.3A Input Current Threshold, 119kHz FrequencyLimit and 41.5°C Transmit Coil Surface Temperature Limit in a Wireless Power System with LTC4120-4.2 as a400mA Single Cell Li-Ion Battery Charger at the Receiver
Features
Monolithic 5W Wireless Power Transmitternn AutoResonantTM Switching Frequency Adjusts to ResonantCapacitance and Transmit Coil Inductancenn Transmit Power Automatically Adjusts to ReceiverLoadnn Input Voltage Range: 3V to 5.5Vnn Integrated 100mΩ Full Bridge Switchesnn Multiple Foreign Object Detection Methodsnn Programmable Average Input Current Limit andMonitornn NTC Input for System/Component TemperatureQualified Power Transfernn Wide Operating Switching Frequency Range:50kHz to 250kHznn Thermally Enhanced 4mm × 5mm QFN 20-Lead Package
Typical applications
- Industrial Handhelds
- Medical Equipment
- Hermetically and/or Electrically Insulated Devices
- Military Sensors and Devices
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Compliance | Size | L(µH) | IR(A) | RDC max.(mΩ) | fres(MHz) | Q(%) | P(W) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-WPCC Wireless Power Transfer Transmitter Coil, Qi - A10; MP-A1/A7, 53 x 53 x 6 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Transfer Transmitter Coil | ComplianceQi - A10; MP-A1/A7 | Size53 x 53 x 6 mm | Inductance24 µH | Rated Current6 A | DC Resistance100 mΩ | Self Resonant Frequency5 MHz | Q-Factor180 % | Power Capability [1]100 W | ||||
 | WE-WPCC Wireless Power Transfer Transmitter Coil, Qi - A10; MP-A1/A7, Ø 50 x 6 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Transfer Transmitter Coil | ComplianceQi - A10; MP-A1/A7 | SizeØ 50 x 6 mm | Inductance24 µH | Rated Current6 A | DC Resistance100 mΩ | Self Resonant Frequency5 MHz | Q-Factor180 % | Power Capability [1]100 W | ||||
 | WE-WPCC Wireless Power Transfer Transmitter Coil, Qi - A11; MP-A11, Ø 50 x 6 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Transfer Transmitter Coil | ComplianceQi - A11; MP-A11 | SizeØ 50 x 6 mm | Inductance6.3 µH | Rated Current6 A | DC Resistance51 mΩ | Self Resonant Frequency24 MHz | Q-Factor120 % | Power Capability [1]100 W | ||||
 | WE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, Ø 26 x 1.3 mm | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-WPCC Wireless Power Transfer Receiver Coil | Complianceworks with Qi Rx IC's | SizeØ 26 x 1.3 mm | Inductance47 µH | Rated Current1.5 A | DC Resistance500 mΩ | Self Resonant Frequency8 MHz | Q-Factor25 % | Power Capability [1]20 W |