LTC4068XEDD-4.2#TRPBF

Product Overview

Category

The LTC4068XEDD-4.2#TRPBF belongs to the category of integrated circuits (ICs) and specifically falls under the battery charger ICs.

Use

This product is primarily used for charging single-cell lithium-ion/polymer batteries in various portable electronic devices such as smartphones, tablets, digital cameras, and portable media players.

Characteristics

The LTC4068XEDD-4.2#TRPBF exhibits several key characteristics that make it suitable for battery charging applications. It supports a wide input voltage range, typically from 4.35V to 6V, allowing it to be powered by a variety of sources such as USB ports or wall adapters. The device also incorporates a programmable charge current up to 950mA, enabling efficient and fast charging. Additionally, it features an automatic recharge function, thermal regulation, and a charge termination timer for enhanced safety and reliability.

Package and Quantity

The LTC4068XEDD-4.2#TRPBF is available in a small form factor 10-lead DFN (Dual Flat No-Lead) package, which ensures space-saving integration into compact electronic designs. It is supplied in tape and reel packaging, with a quantity of 3,000 units per reel.

Specifications

• Input Voltage Range: 4.35V - 6V
• Charge Current: Up to 950mA (Programmable)
• Charge Termination Timer: Programmable
• Thermal Regulation: Yes
• Automatic Recharge: Yes
• Package Type: 10-Lead DFN
• Package Dimensions: 3mm x 3mm
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LTC4068XEDD-4.2#TRPBF features the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. PROG (Charge Current Programming)
4. STAT (Status Indicator)
5. TS (Thermal Sense)
6. BAT (Battery Connection)
7. VOUT (Output Voltage)
8. CE (Charge Enable)
9. FLT (Fault Indicator)
10. TIMER (Charge Termination Timer Programming)

Functional Features

The LTC4068XEDD-4.2#TRPBF offers several functional features that enhance its performance as a battery charger IC:

1. Programmable Charge Current: The charge current can be adjusted according to the specific battery requirements, allowing for optimized charging and extended battery life.

2. Automatic Recharge: After the battery voltage drops below a certain threshold, the device automatically initiates the recharge process, ensuring continuous power availability.

3. Thermal Regulation: The IC incorporates thermal regulation to prevent overheating during charging, thereby enhancing safety and protecting the battery from damage.

4. Charge Termination Timer: The charge termination timer can be programmed to stop the charging process after a specified duration, preventing overcharging and maximizing battery lifespan.

Advantages and Disadvantages

Advantages

• Wide input voltage range enables versatile power source compatibility.
• Programmable charge current allows customization for different battery types.
• Automatic recharge feature ensures uninterrupted power supply.
• Thermal regulation prevents overheating and protects the battery.
• Charge termination timer prevents overcharging and extends battery life.

Disadvantages

• Limited to single-cell lithium-ion/polymer battery charging applications.
• Requires additional external components for complete battery charging circuit implementation.

Working Principles

The LTC4068XEDD-4.2#TRPBF operates based on a constant-current/constant-voltage (CC/CV) charging algorithm. Initially, it delivers a constant current to the battery until a predefined voltage threshold is reached. At this point, the charger switches to a constant voltage mode, maintaining the battery voltage at the specified level while reducing the charging current. This approach ensures efficient and safe charging, preventing overcharging or undercharging of the battery.

Detailed Application Field Plans

The LTC4068XEDD-4.2#TRPBF finds extensive application in various portable electronic devices that utilize single-cell lithium-ion/polymer batteries. Some specific application fields include:

1. Smartphones: The IC can be integrated into smartphone designs to provide efficient and reliable battery charging capabilities.

2. Tablets: Tablet devices can benefit from the LTC4068XEDD-4.2#TRPBF's programmable charge current and automatic recharge features for optimized battery performance.

3. Digital Cameras: By incorporating this battery charger IC, digital cameras can ensure fast and safe charging of their lithium-ion/polymer batteries.

4. Portable Media Players: The LTC4068XEDD-4.2#TRPBF enables portable media players to have a compact and efficient battery charging solution.

Detailed and Complete Alternative Models