LTC4055EUF#PBF

Product Overview

Category

The LTC4055EUF#PBF belongs to the category of battery charger ICs (Integrated Circuits).

Use

This product is primarily used for charging lithium-ion batteries.

Characteristics

• The LTC4055EUF#PBF is a high-performance, standalone linear charger for single-cell lithium-ion batteries.
• It offers a complete charging solution with a constant-current/constant-voltage charge algorithm.
• The device operates from a USB port or an AC wall adapter, making it suitable for various applications.
• It provides accurate charge termination and conditioning for optimal battery performance.
• The LTC4055EUF#PBF features a programmable charge current up to 1A, allowing flexibility in charging different battery capacities.

Package

The LTC4055EUF#PBF comes in a small 4mm x 4mm QFN (Quad Flat No-Lead) package.

Essence

The essence of the LTC4055EUF#PBF lies in its ability to efficiently and safely charge lithium-ion batteries, ensuring optimal performance and longevity.

Packaging/Quantity

This product is typically packaged in reels and is available in quantities suitable for both prototyping and mass production.

Specifications

• Input Voltage Range: 4.35V to 6V
• Charge Current Range: Up to 1A (Programmable)
• Charge Termination: Programmable C/10 or Timer
• Preconditioning: 10% of Programmed Current
• Operating Temperature Range: -40°C to 85°C
• Battery Recharge Threshold: 2.9V
• Battery Float Voltage: 4.2V
• Battery Regulation Accuracy: ±0.7%
• Package Type: 4mm x 4mm QFN

Detailed Pin Configuration

The LTC4055EUF#PBF has the following pin configuration:

1. VIN: Input Voltage
2. GND: Ground
3. PROG: Charge Current Programming Pin
4. STAT: Status Indicator Output
5. CE/SHDN: Enable/Shutdown Control Pin
6. VBAT: Battery Voltage Sense
7. TS: Thermal Shutdown Pin

Functional Features

• Constant-Current/Constant-Voltage Charging Algorithm
• Programmable Charge Current for Flexibility
• Accurate Charge Termination and Conditioning
• Thermal Shutdown Protection
• Enable/Shutdown Control for Power Management
• Status Indicator Output for Charging Status Monitoring

Advantages and Disadvantages

Advantages

• High-performance charging solution for lithium-ion batteries
• Flexible charge current programming
• Accurate charge termination for optimal battery performance
• Compact package size for space-constrained applications
• Wide operating temperature range for versatility

Disadvantages

• Limited to single-cell lithium-ion battery charging
• Requires external components for complete charging circuit implementation

Working Principles

The LTC4055EUF#PBF operates by utilizing a constant-current/constant-voltage charging algorithm. It starts by delivering a constant current to the battery until the battery voltage reaches the programmed float voltage. Once the float voltage is reached, the charger switches to a constant-voltage mode, maintaining the battery voltage at the float voltage level while reducing the charging current. This ensures that the battery is charged efficiently without overcharging.

Detailed Application Field Plans

The LTC4055EUF#PBF finds application in various fields, including but not limited to: - Portable electronic devices (e.g., smartphones, tablets) - Wearable devices (e.g., smartwatches, fitness trackers) - Portable medical devices - Wireless communication devices - Industrial equipment

Detailed and Complete Alternative Models

Some alternative models to the LTC4055EUF#PBF include: - MCP73831 - MAX1551 - BQ24075

These models offer similar functionality and can be considered as alternatives depending on specific requirements and design considerations.

In conclusion, the LTC4055EUF#PBF is a high-performance battery charger IC designed for single-cell lithium-ion batteries. Its programmable charge current, accurate charge termination, and compact package make it suitable for various portable electronic devices and other applications. While it has limitations in terms of battery compatibility and external component requirements, alternative models are available to cater to different design needs.