LTC4120EUD-4.2

Product Overview

Category

The LTC4120EUD-4.2 belongs to the category of integrated circuits (ICs) and is specifically designed for wireless power transfer applications.

Use

This IC is primarily used for managing and controlling wireless power transfer in various electronic devices, such as smartphones, tablets, wearables, and other portable devices.

Characteristics

• The LTC4120EUD-4.2 is a highly efficient wireless power receiver that operates at a frequency of 6.78 MHz.
• It supports both near-field and far-field wireless charging technologies.
• This IC offers a high level of integration, combining the rectifier, regulator, and control circuitry into a single package.
• It provides a reliable and efficient solution for wireless power transfer, enabling convenient charging without the need for physical connectors.

Package and Essence

The LTC4120EUD-4.2 is available in a small form factor 12-pin QFN (Quad Flat No-Lead) package. Its compact size allows for easy integration into space-constrained electronic devices. The essence of this IC lies in its ability to efficiently convert wireless power signals into usable DC voltage for charging purposes.

Packaging/Quantity

The LTC4120EUD-4.2 is typically supplied in tape and reel packaging, with 250 units per reel.

Specifications

• Input Voltage Range: 4V to 19V
• Output Voltage: 4.2V
• Maximum Output Current: 400mA
• Operating Frequency: 6.78MHz
• Efficiency: Up to 80%
• Standby Power Consumption: <1mW
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LTC4120EUD-4.2 features a total of 12 pins, each serving a specific function:

1. VIN: Input voltage pin
2. GND: Ground pin
3. VOUT: Output voltage pin
4. PGND: Power ground pin
5. BAT: Battery connection pin
6. NTC: Negative temperature coefficient pin
7. TS: Thermal shutdown pin
8. FOD: Fault output detection pin
9. EN: Enable pin
10. ISET: Current limit setting pin
11. FB: Feedback pin
12. INTVCC: Internal voltage supply pin

Functional Features

• Wireless power receiver with integrated rectifier, regulator, and control circuitry.
• Supports both near-field and far-field wireless charging technologies.
• Automatic input voltage selection for optimal power transfer efficiency.
• Built-in thermal shutdown protection to prevent overheating.
• Fault output detection for system monitoring and safety.
• Programmable current limit for flexible charging options.
• Low standby power consumption for energy-efficient operation.

Advantages and Disadvantages

Advantages

• High integration reduces component count and simplifies design.
• Efficient wireless power transfer enables convenient charging without physical connectors.
• Wide input voltage range allows compatibility with various power sources.
• Small form factor package facilitates easy integration into compact devices.
• Programmable current limit offers flexibility in charging applications.

Disadvantages

• Limited maximum output current may not be suitable for high-power devices.
• Operating frequency may interfere with certain sensitive electronic components.
• Requires proper shielding and layout considerations for optimal performance.

Working Principles

The LTC4120EUD-4.2 operates based on the principles of wireless power transfer using electromagnetic induction. It receives wireless power signals from a compatible transmitter and converts them into usable DC voltage for charging the connected battery or device. The integrated rectifier converts the alternating current (AC) signal into direct current (DC), while the regulator ensures a stable output voltage. The control circuitry manages the power transfer process, optimizing efficiency and providing necessary protection features.

Detailed Application Field Plans

The LTC4120EUD-4.2 finds applications in various electronic devices that require wireless charging capabilities. Some potential application fields include:

1. Smartphones and tablets
2. Wearable devices (smartwatches, fitness trackers)
3. Portable medical devices
4. IoT (Internet of Things) devices
5. Automotive electronics (wireless charging pads for electric vehicles)

Detailed and Complete Alternative Models

1. LTC4120EUD-4.1: Similar to LTC4120EUD-4.2 but with an output voltage of 4.1V.
2. LTC4120EUD-4.0: Similar to LTC4120EUD-4.2 but with an output voltage of 4.0V.
3. LTC4120EUD-4.2HV: High-voltage version with an extended input voltage range up to 36V.
4. LTC4120EUD-4.2MP: Military-grade version with enhanced ruggedness and reliability.

These alternative models offer