BQ26231PWG4

Product Overview

Category

BQ26231PWG4 belongs to the category of integrated circuits (ICs) and specifically falls under the battery management ICs.

Use

This product is primarily used for battery charging and protection in various electronic devices, such as smartphones, tablets, laptops, and portable power banks.

Characteristics

• Battery charging and protection: The BQ26231PWG4 offers a comprehensive solution for managing the charging process and protecting the battery from overcharging, over-discharging, and short circuits.
• High efficiency: The IC incorporates advanced charging algorithms and power management techniques to ensure efficient utilization of power during the charging process.
• Compact package: The BQ26231PWG4 is available in a small-sized package, making it suitable for space-constrained applications.
• Enhanced safety features: It includes built-in safety mechanisms like thermal shutdown, reverse current blocking, and voltage protection to prevent any potential damage to the battery or the device.

Package and Quantity

The BQ26231PWG4 is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package). It is typically sold in reels containing 250 units per reel.

Specifications

• Input voltage range: 4.5V - 6.5V
• Charging current: Up to 2A
• Operating temperature range: -40°C to +85°C
• Standby current: Less than 10µA
• Overvoltage protection threshold: 4.35V
• Undervoltage protection threshold: 2.5V
• Short circuit protection: Yes
• Charge termination methods: Constant voltage, constant current

Detailed Pin Configuration

1. VDD: Power supply input
2. GND: Ground reference
3. TS: Temperature sense pin
4. BAT: Battery connection
5. VSS: Negative terminal of the battery
6. ISET: Charging current setting pin
7. STAT: Status output pin
8. PROG: Programming input pin
9. EN: Enable control pin
10. SDA: I2C data line
11. SCL: I2C clock line
12. INT: Interrupt output pin
13. NTC: Negative temperature coefficient input
14. VREF: Reference voltage output
15. VCC: Supply voltage output
16. SRN: Serial number input
17. TMR: Timer input
18. VSS: Ground reference
19. VDD: Power supply input
20. VSS: Ground reference

Functional Features

• Battery charging control: The BQ26231PWG4 regulates the charging process by monitoring the battery voltage, current, and temperature to ensure safe and efficient charging.
• Charge termination: It employs a combination of constant voltage and constant current charging methods to terminate the charging process once the battery reaches its full capacity.
• Protection mechanisms: The IC incorporates various protection features like overvoltage protection, undervoltage protection, short circuit protection, and thermal shutdown to safeguard the battery and the device.
• Communication interface: The BQ26231PWG4 supports I2C communication protocol, enabling easy integration with microcontrollers or other control systems.

Advantages and Disadvantages

Advantages

• Efficient charging: The advanced charging algorithms optimize the charging process, resulting in faster and more efficient charging cycles.
• Enhanced safety: The built-in protection mechanisms prevent potential damage to the battery and the device, ensuring safe operation.
• Compact size: The small package size makes it suitable for space-constrained applications.
• Easy integration: The I2C interface simplifies the integration of the IC with other control systems.

Disadvantages

• Limited charging current: The maximum charging current of 2A may not be sufficient for high-capacity batteries or devices with fast charging requirements.
• Dependency on external components: Additional external components, such as resistors and capacitors, may be required for proper operation.

Working Principles

The BQ26231PWG4 operates by continuously monitoring the battery voltage, current, and temperature during the charging process. It adjusts the charging parameters accordingly to ensure optimal charging efficiency and safety. The IC terminates the charging process once the battery reaches its full capacity, preventing overcharging. It also incorporates various protection mechanisms to safeguard the battery from potential damage caused by overvoltage, undervoltage, short circuits, or excessive temperature.

Detailed Application Field Plans

The BQ26231PWG4 is widely used in various portable electronic devices that require battery charging and protection. Some of the common application fields include:

1. Smartphones and tablets
2. Laptops and ultrabooks
3. Portable power banks
4. Wearable devices
5. Bluetooth speakers
6. Handheld gaming consoles
7. Digital cameras

Detailed and Complete Alternative Models

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