LTC4098EPDC-1

Product Overview

Category

The LTC4098EPDC-1 belongs to the category of power management integrated circuits (PMICs).

Use

This PMIC is primarily used for managing and charging single-cell lithium-ion/polymer batteries.

Characteristics

• The LTC4098EPDC-1 offers a compact and efficient solution for battery charging applications.
• It provides a wide input voltage range, making it suitable for various power sources.
• This PMIC incorporates a high-efficiency step-down DC/DC converter for power delivery.
• It includes an accurate battery charger with programmable charge current and termination.
• The LTC4098EPDC-1 also features a comprehensive set of protection functions to ensure safe operation.

Package

The LTC4098EPDC-1 is available in a small 12-pin DFN package, which facilitates space-constrained designs.

Essence

The essence of the LTC4098EPDC-1 lies in its ability to efficiently manage and charge single-cell lithium-ion/polymer batteries while providing essential protection features.

Packaging/Quantity

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

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Charge Current Range: Up to 2A
• Programmable Charge Termination
• Battery Float Voltage: 4.2V
• Step-Down Converter Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. VOUT: Output voltage pin
4. BAT: Battery connection pin
5. PROG: Charge current programming pin
6. STAT: Status output pin
7. FLT: Fault output pin
8. EN: Enable pin
9. ISET: Input current limit programming pin
10. TS: Thermal shutdown pin
11. SCL: I2C serial clock pin
12. SDA: I2C serial data pin

Functional Features

• Integrated battery charger and step-down DC/DC converter
• Programmable charge current and termination
• Automatic recharge feature for depleted batteries
• Battery temperature monitoring and protection
• Input current limit programmability
• I2C interface for configuration and status monitoring
• Fault detection and reporting

Advantages and Disadvantages

Advantages

• Compact and efficient solution for battery charging applications
• Wide input voltage range allows compatibility with various power sources
• Comprehensive set of protection functions ensures safe operation
• Programmable charge current and termination provide flexibility
• I2C interface enables easy configuration and status monitoring

Disadvantages

• Limited to single-cell lithium-ion/polymer battery charging applications
• Requires additional external components for complete system integration

Working Principles

The LTC4098EPDC-1 integrates a battery charger and a step-down DC/DC converter. The charger utilizes a constant-current/constant-voltage (CC/CV) charging algorithm to efficiently charge the connected lithium-ion/polymer battery. The charge current and termination voltage can be programmed to suit specific battery requirements.

The step-down converter provides a regulated output voltage, which can power the load or charge the battery. It operates at high efficiency, minimizing power losses and maximizing battery life.

The PMIC includes various protection features such as overvoltage protection, undervoltage lockout, thermal shutdown, and battery temperature monitoring. These safeguards ensure safe and reliable operation of the charging system.

Detailed Application Field Plans

The LTC4098EPDC-1 finds application in various portable electronic devices that utilize single-cell lithium-ion/polymer batteries. Some common application fields include:

1. Smartphones and tablets
2. Wearable devices
3. Portable medical devices
4. Wireless communication devices
5. Portable audio/video players

Detailed and Complete Alternative Models

1. LTC4098EPDC-2: Similar to LTC4098EPDC-1, but with additional features for multi-cell battery charging.
2. LTC4098EPDC-3: Enhanced version with higher charge current capability and extended temperature range.
3. LTC4098EPDC-4: Compact variant with reduced pin count and simplified functionality.

These alternative models offer similar functionality to the LTC4098EPDC-1 but cater to specific requirements or constraints in different applications.

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