LT3651EUHE-4.2#PBF

Product Overview

Category

The LT3651EUHE-4.2#PBF belongs to the category of integrated circuits (ICs) and is specifically designed for battery charging applications.

Use

This product is primarily used for charging lithium-ion batteries in various electronic devices such as smartphones, tablets, portable media players, and other portable electronic devices.

Characteristics

• Input Voltage Range: 4V to 32V
• Output Voltage: 4.2V
• Charging Current: Up to 2A
• Package Type: 28-Lead Exposed Pad QFN
• Essence: Battery charging IC with high efficiency and versatile features
• Packaging/Quantity: Available in tape and reel packaging with a quantity of 250 units per reel

Specifications

• Input Voltage Range: 4V to 32V
• Output Voltage: 4.2V
• Charging Current: Up to 2A
• Efficiency: Up to 94%
• Operating Temperature Range: -40°C to 85°C
• Package Type: 28-Lead Exposed Pad QFN
• Dimensions: 5mm x 5mm

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground pin
3. PROG: Programming pin for setting the charging current
4. STAT: Status indicator pin
5. CE: Enable pin for controlling the charging process
6. TS: Thermistor input pin for temperature monitoring
7. BAT: Battery connection pin
8. VOUT: Output voltage pin

Functional Features

• High Efficiency: The LT3651EUHE-4.2#PBF offers up to 94% charging efficiency, ensuring optimal use of power during the charging process.
• Programmable Charging Current: The PROG pin allows users to set the desired charging current, providing flexibility for different battery capacities.
• Temperature Monitoring: The TS pin enables temperature monitoring through an external thermistor, ensuring safe charging conditions.
• Status Indication: The STAT pin provides visual indication of the charging status, allowing users to easily monitor the progress.

Advantages and Disadvantages

Advantages

• High charging efficiency ensures faster charging times.
• Programmable charging current accommodates various battery capacities.
• Temperature monitoring ensures safe charging conditions.
• Visual status indication simplifies monitoring.

Disadvantages

• Limited to lithium-ion battery charging applications.
• Requires external thermistor for temperature monitoring.

Working Principles

The LT3651EUHE-4.2#PBF operates based on a switching regulator architecture. It utilizes a high-frequency switching circuit to convert the input voltage to the desired output voltage for charging the connected lithium-ion battery. The charging current can be programmed using the PROG pin, allowing customization for different battery capacities. The IC also incorporates temperature monitoring to ensure safe charging conditions by utilizing an external thermistor.

Detailed Application Field Plans

The LT3651EUHE-4.2#PBF finds extensive application in various portable electronic devices that utilize lithium-ion batteries. Some specific application fields include: - Smartphones and tablets - Portable media players - Wearable devices - GPS navigation systems - Portable gaming consoles

Detailed and Complete Alternative Models

1. LT3651EUHE-4.1#PBF: Similar to LT3651EUHE-4.2#PBF but with an output voltage of 4.1V.
2. LT3651EUHE-4.0#PBF: Similar to LT3651EUHE-4.2#PBF but with an output voltage of 4.0V.
3. LT3651EUHE-4.2#TRMPBF: Similar to LT3651EUHE-4.2#PBF but available in tape and reel packaging with a quantity of 3000 units per reel.

These alternative models offer similar functionality and characteristics, providing options for different charging requirements.

In conclusion, the LT3651EUHE-4.2#PBF is a highly efficient battery charging IC designed for lithium-ion batteries. Its programmable charging current, temperature monitoring, and visual status indication make it suitable for various portable electronic devices. While limited to lithium-ion battery applications, it offers advantages such as high efficiency and customization options.