BQ24745RHDT

Product Overview

Category

BQ24745RHDT belongs to the category of battery charger ICs (Integrated Circuits).

Use

This product is primarily used for charging batteries in various electronic devices such as laptops, tablets, and smartphones.

Characteristics

• High efficiency charging
• Wide input voltage range
• Multiple protection features
• Programmable charge current and voltage
• Thermal regulation for safe operation

Package

BQ24745RHDT is available in a small outline package (SOP) with 20 pins.

Essence

The essence of BQ24745RHDT lies in its ability to efficiently charge batteries while providing necessary protection mechanisms.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 24V
• Charge Voltage Range: 3.6V to 24V
• Charge Current Range: Up to 8A
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 95%
• Protection Features: Overvoltage, overcurrent, short circuit, and thermal protection

Detailed Pin Configuration

1. VCC: Power supply input
2. ACIN: AC adapter input
3. TS: Thermistor input for temperature monitoring
4. BAT: Battery connection
5. SRN: System reset output
6. SDA: I2C data line
7. SCL: I2C clock line
8. INT: Interrupt output
9. ILIM: Charge current limit programming
10. PROG: Charge voltage programming
11. STAT: Status output
12. CE: Charger enable control
13. DPM: Dynamic power management input
14. TS2: Second thermistor input
15. TS1: First thermistor input
16. SRP: System reset input
17. SRSET: Soft reset control
18. SRNSET: Reset output control
19. VSS: Ground connection
20. VCC: Power supply input

Functional Features

• Dynamic power management for efficient charging
• I2C communication interface for configuration and monitoring
• Programmable charge current and voltage settings
• Thermal regulation to prevent overheating
• System reset and interrupt outputs for status indication

Advantages and Disadvantages

Advantages

• High charging efficiency leads to faster battery charging times
• Wide input voltage range allows compatibility with various power sources
• Multiple protection features ensure safe charging operation
• Programmable charge current and voltage settings provide flexibility
• Thermal regulation prevents damage due to overheating

Disadvantages

• Limited availability of alternative models from other manufacturers
• Relatively higher cost compared to some other battery charger ICs

Working Principles

BQ24745RHDT operates by regulating the charging current and voltage supplied to the battery. It utilizes an internal switch-mode architecture to achieve high charging efficiency. The device communicates with the system through an I2C interface, allowing for configuration and monitoring of charging parameters. Various protection mechanisms are implemented to safeguard against overvoltage, overcurrent, short circuit, and thermal issues.

Detailed Application Field Plans

BQ24745RHDT is widely used in portable electronic devices such as laptops, tablets, smartphones, and power banks. Its ability to efficiently charge batteries while providing necessary protection makes it suitable for a broad range of applications.

Detailed and Complete Alternative Models

While BQ24745RHDT is a popular choice for battery charger ICs, there are alternative models available from different manufacturers. Some notable alternatives include:

1. LTC4000-1 - Linear Technology
2. MAX8903A - Maxim Integrated
3. MCP73871 - Microchip Technology
4. TPS61085 - Texas Instruments

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

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