LT3650IDD-8.2#PBF

Product Overview

Category

The LT3650IDD-8.2#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: 8.2V
• Charging Current: Up to 2A
• Package Type: DFN (Dual Flat No-Lead)
• Essence: Battery charging IC with high efficiency and compact design
• Packaging/Quantity: Available in tape and reel packaging with a quantity of 2500 units per reel

Specifications

• Input Voltage Range: 4V to 32V
• Output Voltage: 8.2V ±1%
• Charging Current: Up to 2A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to 85°C
• Package Type: DFN-10 (3mm x 3mm)

Detailed Pin Configuration

The LT3650IDD-8.2#PBF has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. PROG: Programming pin for setting the charging current
4. STAT: Status pin indicating charging status
5. FLT: Fault pin indicating any fault conditions
6. BAT: Battery connection pin
7. TS: Thermistor input pin for temperature monitoring
8. ISET: Current sense resistor connection pin
9. VFB: Feedback pin for regulating output voltage
10. VOUT: Output voltage pin

Functional Features

• High Efficiency: The LT3650IDD-8.2#PBF offers up to 95% charging efficiency, ensuring optimal use of input power.
• Programmable Charging Current: The PROG pin allows users to set the desired charging current according to battery requirements.
• Fault Protection: The FLT pin provides an indication of any fault conditions such as overvoltage, undervoltage, or overtemperature, ensuring safe operation.
• Temperature Monitoring: The TS pin enables temperature monitoring through an external thermistor, preventing overheating during charging.

Advantages and Disadvantages

Advantages

• High charging efficiency ensures faster charging times.
• Compact package size allows for easy integration into space-constrained devices.
• Programmable charging current provides flexibility for different battery types and capacities.
• Fault protection features enhance safety during charging.

Disadvantages

• Limited output voltage options may not be suitable for all applications requiring different voltage levels.
• Requires additional external components for complete battery charging circuit implementation.

Working Principles

The LT3650IDD-8.2#PBF operates based on a switching regulator topology. It utilizes a high-frequency switching converter to efficiently regulate the charging current and voltage. The IC incorporates a feedback loop that continuously monitors the battery voltage and adjusts the charging current accordingly. This ensures optimal charging performance while protecting the battery from overcharging or undercharging.

Detailed Application Field Plans

The LT3650IDD-8.2#PBF is widely used in various portable electronic devices that require lithium-ion battery charging. Some common application fields include:

1. Smartphones and Tablets: The IC is utilized in the charging circuits of smartphones and tablets to provide efficient and reliable battery charging.
2. Portable Media Players: It is employed in portable media players to enable fast and safe charging of the built-in lithium-ion batteries.
3. Wearable Devices: The IC finds application in wearable devices such as smartwatches and fitness trackers, ensuring efficient charging for extended battery life.

Detailed and Complete Alternative Models

1. LT3650IDD-8.4#PBF: Similar to LT3650IDD-8.2#PBF, but with an output voltage of 8.4V.
2. LT3650IDD-7.5#PBF: Similar to LT3650IDD-8.2#PBF, but with an output voltage of 7.5V.
3. LT3650IDD-9.0#PBF: Similar to LT3650IDD-8.2#PBF, but with an output voltage of 9.0V.

These alternative models provide different output voltage options to cater to diverse charging requirements.

In conclusion, the LT3650IDD-8.2#PBF is a highly efficient integrated circuit designed for lithium-ion battery charging applications. Its compact size, programmable charging current, and fault protection features make it suitable for various portable electronic devices. However, it may have limitations in terms of output voltage options and requires additional external components for complete circuit implementation.