LTC4120EUD

Product Overview

• Category: Integrated Circuit
• Use: Battery Charger
• Characteristics: High Efficiency, Wireless Charging, Programmable Charge Current, Thermal Regulation
• Package: 16-Lead QFN
• Essence: The LTC4120EUD is a high-efficiency, wireless battery charger IC designed for various portable devices.
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.95V to 7V
• Output Voltage: Programmable from 4.1V to 20V
• Maximum Charge Current: 400mA
• Charging Efficiency: Up to 90%
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC4120EUD has a 16-lead QFN package with the following pin configuration:

1. VOUT
2. GND
3. PGND
4. EN
5. ISET
6. VCC
7. SDA
8. SCL
9. INT
10. NTC
11. BAT
12. VRECT
13. VCOIL
14. COIL
15. NC
16. VIN

Functional Features

• High efficiency wireless charging
• Programmable charge current
• Thermal regulation for safe charging
• Wide input voltage range
• Integrated power management features
• Fault detection and protection mechanisms

Advantages

• High charging efficiency reduces energy waste
• Programmable charge current allows flexibility in charging different battery types
• Thermal regulation ensures safe charging without overheating
• Wide input voltage range enables compatibility with various power sources
• Integrated power management features simplify system design
• Fault detection and protection mechanisms enhance reliability

Disadvantages

• Limited maximum charge current may not be suitable for high-capacity batteries
• Requires external components for complete charging system implementation
• Relatively higher cost compared to traditional wired chargers

Working Principles

The LTC4120EUD operates on the principle of wireless power transfer using inductive coupling. It consists of a transmitter (primary) coil and a receiver (secondary) coil. When an AC voltage is applied to the transmitter coil, it generates a magnetic field. This magnetic field induces a voltage in the receiver coil, which is rectified and regulated to charge the battery.

Detailed Application Field Plans

The LTC4120EUD is widely used in various portable devices, including smartphones, tablets, wearable devices, and wireless headphones. Its wireless charging capability eliminates the need for physical connectors, providing convenience and ease of use for users.

Detailed and Complete Alternative Models

1. LTC4125: Similar functionality with additional power management features.
2. LTC4150: Battery charger with integrated Coulomb counter for accurate capacity measurement.
3. LTC4000: High-power battery charger with multi-chemistry support.

These alternative models offer different features and capabilities to suit specific application requirements.

In conclusion, the LTC4120EUD is a high-efficiency wireless battery charger IC designed for portable devices. With its programmable charge current, thermal regulation, and wide input voltage range, it offers flexibility and safety in charging various battery types. While it has some limitations, its advantages outweigh the disadvantages, making it a popular choice in the market.