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IC manufacturers Analog Devices

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reference designLTC4120-4.2

Analog Devices LTC4120-4.2

5W AutoResonant Wireless Power Transmitter

Overview

TopologyWireless Power Transfer
Input voltage4.75-5.25 V
Switching frequency50-250 kHz
IC revision00

Description

LTC4125 Driving a 24μH Transmit Coil at 103kHz, with 530mA Input Current Threshold, 119kHzFrequency Limit and 41.5°C Transmit Coil Surface Temperature Limit in a Wireless Power Systemwith LTC4120 as a 200mA 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

  • Military Sensors and Devices
  • Medical Equipment
  • Industrial Handhelds
  • Hermetically and/or Electrically Insulated Devices

More information

Products

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SamplesAvailability & Sample
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760308100110
SPECWE-WPCC Wireless Power Transfer Transmitter Coil, Qi - A10; MP-A1/A7, Ø 50 x 6 mm
Simu­lation
Availability
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Downloads8 files

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
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760308101303
SPECWE-WPCC Wireless Power Transfer Receiver Coil, works with Qi Rx IC's, Ø 26 x 1.3 mm
Simu­lation
Availability
–
Downloads8 files

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
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