BQ24721CRHBT - English Editing Encyclopedia Entry

Product Overview

Category

The BQ24721CRHBT belongs to the category of power management integrated circuits (PMICs).

Use

This PMIC is specifically designed for battery charging applications in portable electronic devices such as laptops, tablets, and smartphones.

Characteristics

• The BQ24721CRHBT offers high efficiency and accurate control over the charging process.
• It supports multiple battery chemistries, including lithium-ion (Li-ion), lithium-polymer (Li-Po), and nickel-cadmium (Ni-Cd).
• This PMIC incorporates various protection features like overvoltage protection, overcurrent protection, and thermal regulation.
• It provides a flexible charging profile that can be customized according to the specific requirements of the battery being charged.

Package and Quantity

The BQ24721CRHBT is available in a compact 32-pin VQFN package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input Voltage Range: 4.5V to 24V
• Charging Voltage Range: 3.6V to 25.2V
• Maximum Charging Current: 8A
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The BQ24721CRHBT features the following pin configuration:

1. ACIN: Input voltage from AC adapter
2. ACOK: AC adapter present indicator
3. ACDET: AC adapter detection input
4. BAT: Battery voltage sense input
5. TS: Thermistor input for temperature monitoring
6. ISET: Charging current setting resistor connection
7. SRN: Soft-start ramp timing capacitor connection
8. SDA: I2C data line
9. SCL: I2C clock line
10. INT: Interrupt output
11. STAT1: Charging status indicator
12. STAT2: Charging status indicator
13. EN: Enable control input
14. ILIM: Input current limit setting resistor connection
15. VREF: Reference voltage output
16. VSS: Ground reference
17. VDD: Power supply input
18. SRP: Soft-start ramp timing capacitor connection
19. SRSET: Soft-start ramp timing resistor connection
20. SRNSET: Soft-start ramp timing resistor connection
21. BATSET: Battery voltage sense resistor connection
22. TSSET: Thermistor bias resistor connection
23. ISET2: Charging current setting resistor connection
24. SDA2: I2C data line
25. SCL2: I2C clock line
26. INT2: Interrupt output
27. STAT3: Charging status indicator
28. STAT4: Charging status indicator
29. EN2: Enable control input
30. ILIM2: Input current limit setting resistor connection
31. VREF2: Reference voltage output
32. VSS2: Ground reference

Functional Features

• Dynamic Power Management: The BQ24721CRHBT optimizes power delivery based on the battery's state of charge, ensuring efficient charging and minimizing energy loss.
• Charge Termination Control: This PMIC employs advanced algorithms to accurately detect when the battery is fully charged, preventing overcharging and extending battery life.
• System Protection: It incorporates various protection mechanisms such as overvoltage, overcurrent, and overtemperature protection to safeguard both the battery and the device being charged.
• I2C Communication Interface: The BQ24721CRHBT supports I2C communication, allowing for easy configuration and monitoring of charging parameters.

Advantages and Disadvantages

Advantages

• High charging efficiency
• Wide input voltage range
• Support for multiple battery chemistries
• Comprehensive protection features
• Customizable charging profiles

Disadvantages

• Limited maximum charging current (8A)
• Requires external components for complete functionality

Working Principles

The BQ24721CRHBT operates by regulating the charging current and voltage supplied to the battery. It continuously monitors the battery's state of charge and adjusts the charging parameters accordingly. The PMIC employs a combination of voltage and current regulation techniques to ensure safe and efficient charging.

Detailed Application Field Plans

The BQ24721CRHBT is widely used in various portable electronic devices, including but not limited to: - Laptops - Tablets - Smartphones - Portable gaming consoles - Portable medical devices

Detailed Alternative Models

For users seeking alternative options, the following PMICs can be considered: 1. BQ24725CRHBT 2. BQ24727CRHBT 3. BQ24730CRHBT 4. BQ24735CRHBT 5. BQ24740CRHBT

These alternative models offer similar functionality and characteristics