LTC4071IMS8E#TRPBF

Product Overview

Category: Integrated Circuit (IC)

Use: Battery Charger

Characteristics: - Small form factor - High efficiency - Low quiescent current - Wide input voltage range - Programmable charge current - Thermal regulation for safe charging

Package: MSOP-8

Essence: The LTC4071IMS8E#TRPBF is a battery charger IC designed for single-cell lithium-ion/polymer batteries. It provides a complete charging solution with high efficiency and low quiescent current.

Packaging/Quantity: The LTC4071IMS8E#TRPBF is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Voltage Range: 4.35V to 6V
• Charge Current Range: 10mA to 950mA
• Preconditioning Current: 10% of programmed charge current
• Charge Termination: C/10 or timer
• Battery Float Voltage: 4.2V
• Quiescent Current: 550µA
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The LTC4071IMS8E#TRPBF has the following pin configuration:

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| | --| VIN | --| BAT | --| PROG | --| STAT | --| GND | --| ISET | --| VFB | |___________| ```

Functional Features

1. Programmable Charge Current: The PROG pin allows the user to set the desired charge current, ranging from 10mA to 950mA.
2. Charge Termination Options: The LTC4071IMS8E#TRPBF supports charge termination based on either C/10 or a programmable timer.
3. Thermal Regulation: The IC incorporates thermal regulation to prevent overheating during charging, ensuring safe operation.
4. Status Indicator: The STAT pin provides information about the charging status, indicating whether the battery is charging, fully charged, or in fault conditions.
5. Wide Input Voltage Range: The LTC4071IMS8E#TRPBF can operate with an input voltage range of 4.35V to 6V, making it suitable for various power sources.

Advantages and Disadvantages

Advantages: - Small form factor enables compact designs - High efficiency minimizes power loss - Low quiescent current prolongs battery life - Wide input voltage range allows flexibility in power source selection - Programmable charge current suits different battery capacities

Disadvantages: - Limited to single-cell lithium-ion/polymer batteries - Not suitable for multi-cell battery charging applications

Working Principles

The LTC4071IMS8E#TRPBF operates as a constant-current/constant-voltage (CC/CV) charger for single-cell lithium-ion/polymer batteries. It uses a programmable charge current to deliver energy to the battery until the desired voltage is reached. Once the battery reaches the float voltage, the charger switches to a constant-voltage mode to maintain the battery at its maximum capacity.

The IC continuously monitors the battery voltage, temperature, and charging current to ensure safe and efficient charging. It also provides protection features such as overvoltage, undervoltage, and overtemperature protection.

Detailed Application Field Plans

The LTC4071IMS8E#TRPBF is widely used in portable electronic devices, wireless sensors, and other battery-powered applications. Some specific application fields include: - Smartphones and tablets - Wearable devices - Bluetooth headsets - GPS trackers - IoT devices

Detailed and Complete Alternative Models

1. LTC4070: Similar to LTC4071, but with a higher input voltage range (up to 10V).
2. MAX1555: Integrated battery charger IC for single-cell lithium-ion batteries.
3. BQ24075: Single-cell Li-Ion/Li-Polymer battery charger with integrated power path management.

These alternative models offer similar functionality and can be considered as alternatives to the LTC4071IMS8E#TRPBF depending on specific requirements.

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