LTC4120
LTC4120-4.2

RECOMMENDED FOR NEW DESIGNS

Wireless Power Receiver and 400mA Buck Battery Charger

Data Sheet (Rev. G) Product Selection Table
Part Models
8
1ku List Price
Starting From $3.89
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Part Details

  • Dynamic Harmonization Control Optimizes Wireless Charging Over a Wide Coupling Range
  • Wide Input Voltage Range (12.5V to 40V)
  • Adjustable Float Voltage (3.5V to 11V)
  • Fixed 4.2V Float Voltage Option (LTC4120-4.2)
  • 50mA to 400mA Charge Current Programmed with a Single Resistor
  • ±1% Feedback Voltage Accuracy
  • Programmable 5% Accurate Charge Current
  • No Microprocessor Required
  • No Transformer Core
  • Thermally Enhanced, Low Profile 16-Lead (3mm × 3mm × 0.75mm) QFN Package
LTC4120
LTC4120-4.2

Wireless Power Receiver and 400mA Buck Battery Charger

LTC4120-4120-4.2 Application Circuit LTC4120-4120-4.2 Pin Configuration LTC4120-4120-4.2 Pin Configuration LTC4120-4120-4.2 Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Application Note 3

Technical Articles 3

Frequently Asked Question 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Pushbutton Controllers 1
LTC2956
RECOMMENDED FOR NEW DESIGNS Wake-Up Timer with Pushbutton Control
Wireless Power Transfer 1
LTC4125
RECOMMENDED FOR NEW DESIGNS 5W AutoResonant Wireless Power Transmitter
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC4120
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC2386A-B

Wireless Power Transfer Demonstration Kit featuring the LTC4125EUFD and the LTC4120EUD

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Product Details

Demonstration kit DC2386A is a kit of the DC2330A LTC4125EUFD demonstration board, the DC2445A-A/DC2445A-B LTC4120EUD demonstration board, and an assortment of different length standoffs. The DC2330A can deliver up to 1.68W to the receive board with up to 12mm spacing between the transmit and receive coils.

eval board
schematic 6
DC2181A-B

LTC4120EUD Demo Board | Wireless Power Receiver and 400mA Buck Battery Charger with Adjustable Charge Voltage and Separate Receiver Coil. DC2181A-B Requires a Transmitter such as DC1969A-B or The Proxi-Point Power-by-Proxi transmitter.

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Product Details

Demonstration circuit 2181A-B features the LTC4120EUD wireless power receiver with 400mA synchronous step-down CC/CV battery charger. The DC2181 is used with the DC1968A wireless power transmitter or the PowerByProxi ProxiPoint transmitter. Either can deliver 2W to the DC2181, with up to 10mm spacing between the transmitter and the receive coil. The basic transmitter doesn’t support foreign metal object detection.

eval board
schematic 7
DC2181A-A

LTC4120EUD-4.2 Demo Board | Wireless Power Receiver and 400mA Buck Battery Charger with Fixed 4.2V charge voltage and separate receive coil. DC2181A-A requires a transmitter such as DC1969A-B or the Proxi-Point Power-by-Proxi transmitter.

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Product Details

Demonstration circuit 2181A-A features the LTC4120-4.2 wireless power receiver with 400mA synchronous step-down CC/CV (4.2V charge voltage) battery charger. The DC2181 is used with the DC1968A wireless power transmitter or the PowerByProxi ProxiPoint transmitter. Either can deliver 2W to the DC2181, with up to 10mm spacing between the transmitter and the receive coil. The basic transmitter doesn’t support foreign metal object detection.
DC2386A-B
Wireless Power Transfer Demonstration Kit featuring the LTC4125EUFD and the LTC4120EUD
DC2386A-B Demo Board DC2386A-B Demo Board DC2386A-B Demo Board DC2330A - Schematic DC2445A - Schematic
DC2181A-B
LTC4120EUD Demo Board | Wireless Power Receiver and 400mA Buck Battery Charger with Adjustable Charge Voltage and Separate Receiver Coil. DC2181A-B Requires a Transmitter such as DC1969A-B or The Proxi-Point Power-by-Proxi transmitter.
DC2181A - Schematic
DC2181A-A
LTC4120EUD-4.2 Demo Board | Wireless Power Receiver and 400mA Buck Battery Charger with Fixed 4.2V charge voltage and separate receive coil. DC2181A-A requires a transmitter such as DC1969A-B or the Proxi-Point Power-by-Proxi transmitter.
DC2181A - Schematic

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