BQ24045DSQT

Product Overview

Category

The BQ24045DSQT belongs to the category of battery charging and management integrated circuits (ICs).

Use

This IC is primarily used for charging single-cell lithium-ion or lithium-polymer batteries.

Characteristics

• The BQ24045DSQT is a highly efficient charger with an integrated power path management feature.
• It supports various charging modes, including constant current (CC) and constant voltage (CV) charging.
• The IC incorporates thermal regulation to prevent overheating during charging.
• It offers programmable charge current and termination settings.
• The BQ24045DSQT includes a built-in load switch for system power path management.

Package

The BQ24045DSQT is available in a small 10-pin SON (2.00 mm x 3.00 mm) package.

Essence

The essence of the BQ24045DSQT lies in its ability to efficiently charge and manage single-cell lithium-ion or lithium-polymer batteries while providing power path management for the system.

Packaging/Quantity

The BQ24045DSQT is typically supplied in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 4.35 V to 6.45 V
• Charge Voltage Range: 3.5 V to 4.44 V
• Charge Current Range: Up to 1.5 A
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. EN (Enable): Enable pin for device control.
2. STAT (Status): Output pin indicating charging status.
3. PG (Power Good): Output pin indicating the presence of input power.
4. TS (Thermal Sense): Input pin for external thermal regulation.
5. PROG (Program): Input pin for programming charge current and termination settings.
6. VSS (Ground): Ground reference pin.
7. BAT (Battery): Positive terminal of the battery being charged.
8. SYS (System): Output pin for system power path management.
9. IN (Input): Input voltage supply pin.
10. TS/NTC (Thermal Sense/Negative Temperature Coefficient): Input pin for external thermal regulation or negative temperature coefficient thermistor.

Functional Features

• Integrated power path management allows simultaneous charging and system power delivery.
• Programmable charge current and termination settings provide flexibility for different battery types.
• Thermal regulation prevents overheating during charging.
• Load switch for system power path management enables seamless transition between battery and external power sources.

Advantages and Disadvantages

Advantages

• Efficient charging and management of lithium-ion or lithium-polymer batteries.
• Integrated power path management simplifies system design.
• Programmable settings offer flexibility for various battery types.
• Thermal regulation ensures safe charging operation.

Disadvantages

• Limited to single-cell battery charging applications.
• Requires external thermal regulation for optimal performance.

Working Principles

The BQ24045DSQT operates by regulating the charging current and voltage according to the programmed settings. It uses a combination of constant current and constant voltage charging modes to ensure efficient and safe charging of the connected battery. The integrated power path management feature allows the device to deliver power to the system while simultaneously charging the battery. Thermal regulation prevents excessive heat buildup during charging, ensuring safe operation.

Detailed Application Field Plans

The BQ24045DSQT finds application in various portable electronic devices that utilize single-cell lithium-ion or lithium-polymer batteries. Some common application fields include: - Smartphones and tablets - Portable media players - Wearable devices - Bluetooth headsets - GPS navigation systems

Detailed and Complete Alternative Models

1. BQ24040DSQT: Similar to BQ24045DSQT, but with a lower charge current capability.
2. BQ24046DSQT: Similar to BQ24045DSQT, but with a higher charge current capability.
3. BQ24048DSQT: Similar to BQ24045DSQT, but with additional features such as battery temperature monitoring.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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