LT3650EDD-8.4#PBF

Product Overview

Category

The LT3650EDD-8.4#PBF belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.

Use

This product is primarily used for battery charging applications, providing a reliable and efficient solution for charging lithium-ion batteries.

Characteristics

The LT3650EDD-8.4#PBF exhibits several key characteristics that make it suitable for battery charging purposes. These include high efficiency, low quiescent current, and a wide input voltage range.

Package

The LT3650EDD-8.4#PBF comes in a small form factor package known as DFN (Dual Flat No-Lead). This package offers excellent thermal performance and ease of integration into various electronic systems.

Essence

The essence of the LT3650EDD-8.4#PBF lies in its ability to provide a compact and efficient charging solution for lithium-ion batteries, ensuring optimal performance and extended battery life.

Packaging/Quantity

This product is typically supplied in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

The LT3650EDD-8.4#PBF features the following specifications:

• Input Voltage Range: 4.95V to 32V
• Output Voltage: 8.4V
• Charging Current: Up to 2A
• Quiescent Current: 85µA
• Efficiency: Up to 94%
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3650EDD-8.4#PBF has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. PROG: Programming pin for setting the charging current
4. STAT: Status pin indicating charging status
5. VBAT: Battery voltage pin
6. TS: Thermal shutdown pin for over-temperature protection

Functional Features

The LT3650EDD-8.4#PBF offers the following functional features:

1. Constant Current/Constant Voltage (CC/CV) Charging: Ensures optimal charging of lithium-ion batteries by providing a controlled charging current followed by a constant voltage.
2. Programmable Charging Current: The PROG pin allows users to set the desired charging current, enabling flexibility in battery charging applications.
3. Thermal Shutdown Protection: The TS pin ensures that the IC shuts down in case of excessive temperature, protecting both the IC and the battery from damage.

Advantages and Disadvantages

Advantages

• High efficiency results in minimal power loss during charging.
• Wide input voltage range allows compatibility with various power sources.
• Compact DFN package facilitates easy integration into space-constrained designs.
• Programmable charging current provides flexibility for different battery capacities.

Disadvantages

• Limited output voltage options may not be suitable for all battery types.
• Requires external components for complete charging circuit implementation.

Working Principles

The LT3650EDD-8.4#PBF operates based on the CC/CV charging algorithm commonly used for lithium-ion batteries. Initially, it delivers a constant current to the battery until a predefined voltage threshold is reached. It then switches to a constant voltage mode, maintaining the battery voltage at the specified level while reducing the charging current gradually.

Detailed Application Field Plans

The LT3650EDD-8.4#PBF finds extensive application in various fields, including:

1. Portable Electronics: Enables efficient charging of lithium-ion batteries in smartphones, tablets, and other portable devices.
2. Medical Devices: Provides a reliable charging solution for medical equipment powered by lithium-ion batteries.
3. Industrial Applications: Supports battery charging in industrial equipment, ensuring uninterrupted operation.

Detailed and Complete Alternative Models

1. LT3650EDD-8.2#PBF: Similar to LT3650EDD-8.4#PBF but with an output voltage of 8.2V.
2. LT3650EDD-7.4#PBF: Offers an output voltage of 7.4V, suitable for specific battery applications.
3. LT3650EDD-12.6#PBF: Designed for higher voltage requirements, providing an output voltage of 12.6V.

These alternative models offer similar functionality and characteristics while catering to different voltage requirements.

In conclusion, the LT3650EDD-8.4#PBF is a power management IC specifically designed for efficient lithium-ion battery charging. With its compact package, programmable charging current, and high efficiency, it offers several advantages for various applications. However, it has limitations in terms of output voltage options and requires additional components for a complete charging circuit implementation. Nonetheless, it serves as a reliable solution in portable electronics, medical devices,