LT3651EUHE-8.4

Product Overview

Category

LT3651EUHE-8.4 belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

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

Characteristics

• Input Voltage Range: 4V to 32V
• Output Voltage: 8.4V
• Charging Current: Up to 2A
• Package Type: 16-Lead QFN
• Essence: High-efficiency battery charger with advanced features
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 250 units per reel

Specifications

The LT3651EUHE-8.4 has the following specifications:

• Input Voltage Range: 4V to 32V
• Output Voltage: 8.4V ±1%
• Charging Current: Up to 2A
• Charge Termination: Programmable
• Preconditioning: Yes
• Battery Temperature Monitoring: Yes
• Package Type: 16-Lead QFN
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The LT3651EUHE-8.4 has a 16-lead QFN package with the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. STAT: Status output pin
4. ISET: Charging current set pin
5. PROG: Programming pin
6. TS: Battery temperature sense pin
7. BAT: Battery connection pin
8. VCC: Supply voltage pin
9. INTVCC: Internal supply voltage pin
10. FLT: Fault indicator pin
11. SDA: I²C data pin
12. SCL: I²C clock pin
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

The LT3651EUHE-8.4 offers the following functional features:

• High-efficiency synchronous buck charger
• Programmable charging current and termination voltage
• Preconditioning for deeply discharged batteries
• Battery temperature monitoring and protection
• Fault indicator for easy troubleshooting
• I²C interface for advanced control and monitoring capabilities

Advantages and Disadvantages

Advantages

• Wide input voltage range allows compatibility with various power sources
• High charging efficiency minimizes energy loss
• Programmable charging parameters provide flexibility for different battery types
• Preconditioning feature enables charging of deeply discharged batteries
• Battery temperature monitoring ensures safe charging operation
• I²C interface allows advanced control and monitoring capabilities

Disadvantages

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

Working Principles

The LT3651EUHE-8.4 operates as a high-efficiency synchronous buck charger. It converts the input voltage from a power source into a regulated output voltage suitable for charging single-cell lithium-ion/polymer batteries. The charging current and termination voltage can be programmed according to the specific battery requirements. The IC also incorporates a preconditioning feature to safely charge deeply discharged batteries. Battery temperature is monitored to prevent overheating and ensure safe charging. The I²C interface allows advanced control and monitoring capabilities, enabling precise regulation and status reporting.

Detailed Application Field Plans

The LT3651EUHE-8.4 finds extensive application in various portable electronic devices that utilize single-cell lithium-ion/polymer batteries. Some of the key application fields include:

1. Smartphones
2. Tablets
3. Digital cameras
4. Portable media players
5. Handheld gaming devices

Detailed and Complete Alternative Models

1. LT3651EUHE-8: Similar to LT3651EUHE-8.4, but with an output voltage of 8V instead of 8.4V.
2. LT3651EUHE-7.4: Similar to LT3651EUHE-8.4, but with an output voltage of 7.4V.
3. LT3651EUHE-5: Similar to LT3651EUHE-8.4, but with an output voltage of 5V.

These alternative models provide options for different battery voltage requirements in various applications.

In conclusion, the LT3651EUHE-8.4 is a high-efficiency battery charger IC designed for single-cell lithium-ion/polymer batteries. It offers programmable charging parameters, advanced features, and an I²C interface for precise control and monitoring. With its wide input voltage range and compatibility with various portable electronic devices, it is a versatile solution for efficient battery charging.