Linear Technology/Analog Devices
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LTC4125EUFD

LTC4125EUFD

Product Overview

  • Category: Integrated Circuit
  • Use: Battery Charger
  • Characteristics: High Efficiency, Wireless Charging, Compact Size
  • Package: 16-Lead QFN
  • Essence: Power Management IC for Wireless Battery Charging
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 4.95V to 7V
  • Output Voltage: Programmable from 4.2V to 20V
  • Maximum Charging Current: 400mA
  • Operating Temperature Range: -40°C to 85°C
  • Charging Method: Resonant Inductive Coupling

Detailed Pin Configuration

  1. VOUT: Output Voltage
  2. GND: Ground
  3. EN: Enable Pin
  4. ISET: Charging Current Set Pin
  5. VIN: Input Voltage
  6. BAT: Battery Connection
  7. TS: Thermal Shutdown
  8. FREQ: Frequency Setting
  9. SDA: I²C Serial Data
  10. SCL: I²C Serial Clock
  11. INTVCC: Internal Regulator Output
  12. NTC: Negative Temperature Coefficient Input
  13. PROG: Programming Pin
  14. FB: Feedback Pin
  15. VDD: Supply Voltage
  16. VREF: Reference Voltage

Functional Features

  • High efficiency wireless charging solution
  • Programmable output voltage for versatile applications
  • Integrated power management features
  • Built-in thermal shutdown protection
  • I²C interface for advanced control and monitoring

Advantages and Disadvantages

Advantages

  • High charging efficiency leads to faster charging times
  • Compact size allows for easy integration into small devices
  • Versatile output voltage range suits various battery types
  • Advanced control and monitoring capabilities through I²C interface

Disadvantages

  • Maximum charging current limited to 400mA
  • Requires an external programming pin for certain functions

Working Principles

The LTC4125EUFD is a power management IC designed for wireless battery charging. It utilizes resonant inductive coupling to transfer power wirelessly from a transmitter coil to a receiver coil. The IC regulates the charging process, ensuring efficient power transfer and safe charging of the battery. The programmable output voltage allows compatibility with different battery chemistries and voltages.

Detailed Application Field Plans

The LTC4125EUFD is suitable for a wide range of applications, including:

  1. Wireless charging pads for smartphones and tablets
  2. Portable medical devices
  3. Wearable electronics
  4. IoT devices
  5. Wireless sensor networks

Detailed and Complete Alternative Models

  1. LTC4120EUFD: Similar functionality with a higher maximum charging current of 800mA.
  2. LTC4123EUFD: Lower cost alternative with reduced features and lower charging current of 200mA.
  3. LTC4127EUFD: Higher power version with a maximum charging current of 1A.

(Note: This list is not exhaustive and there may be other alternative models available.)

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LTC4125EUFD v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LTC4125EUFD in technical solutions:

  1. Q: What is LTC4125EUFD? A: LTC4125EUFD is a wireless power receiver IC designed for applications such as wireless charging of batteries or powering devices wirelessly.

  2. Q: What is the input voltage range supported by LTC4125EUFD? A: The input voltage range supported by LTC4125EUFD is typically between 4V and 19V.

  3. Q: Can LTC4125EUFD be used for wireless charging of mobile phones? A: Yes, LTC4125EUFD can be used for wireless charging of mobile phones, provided that the phone supports wireless charging and the necessary circuitry is implemented.

  4. Q: Does LTC4125EUFD support any specific wireless charging standard? A: LTC4125EUFD is compatible with the Wireless Power Consortium (WPC) Qi standard, which is widely used for wireless charging.

  5. Q: What is the maximum output power that can be achieved with LTC4125EUFD? A: The maximum output power of LTC4125EUFD depends on various factors such as the input voltage, load resistance, and efficiency. It is recommended to refer to the datasheet for detailed information.

  6. Q: Can LTC4125EUFD be used for wireless power transfer over long distances? A: LTC4125EUFD is primarily designed for short-range wireless power transfer, typically within a few centimeters. For longer distances, other technologies like resonant wireless power transfer may be more suitable.

  7. Q: Is LTC4125EUFD suitable for low-power IoT devices? A: Yes, LTC4125EUFD can be used for low-power IoT devices as it supports efficient power transfer for charging or powering such devices wirelessly.

  8. Q: Does LTC4125EUFD have any built-in safety features? A: Yes, LTC4125EUFD incorporates various safety features like overvoltage protection, thermal shutdown, and foreign object detection to ensure safe operation during wireless power transfer.

  9. Q: Can LTC4125EUFD be used in automotive applications? A: Yes, LTC4125EUFD can be used in automotive applications, provided that it meets the necessary automotive standards and requirements.

  10. Q: Are there any evaluation boards or reference designs available for LTC4125EUFD? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs for LTC4125EUFD, which can help in the development and implementation of wireless power transfer solutions.

Please note that these answers are general and it is always recommended to refer to the datasheet and application notes for specific details and guidelines related to the LTC4125EUFD.