BQ26221PWR

Product Overview

Category

BQ26221PWR 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 functionality
• High efficiency and accuracy in charging process
• Overvoltage and overcurrent protection
• Temperature monitoring and control
• Compact and space-saving design

Package

The BQ26221PWR comes in a small outline package (SOP) with 20 pins. This package ensures easy integration into circuit boards and provides mechanical stability.

Essence

The essence of BQ26221PWR lies in its ability to efficiently charge and protect batteries, ensuring their longevity and safe operation.

Packaging/Quantity

The BQ26221PWR is typically packaged in reels or tubes, containing a quantity of 250 units per reel/tube.

Specifications

• Input voltage range: 4.5V - 26V
• Charging current range: 100mA - 2A
• Operating temperature range: -40°C to +85°C
• Battery voltage range: 3.6V - 4.4V
• Standby current: <1µA

Detailed Pin Configuration

The BQ26221PWR has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. VCC: Power supply input
2. GND: Ground reference
3. TS: Temperature sense input
4. BAT: Battery voltage input
5. ISET: Charging current setting
6. STAT: Status output
7. CE: Charge enable input
8. PROG: Programming input
9. VSS: Negative power supply
10. VREF: Reference voltage output
11. VREG: Regulated output voltage
12. SRN: Serial data input
13. SOUT: Serial data output
14. SCLK: Serial clock input
15. INT: Interrupt output
16. TMR: Timer output
17. DSG: Discharge enable input
18. ILIM: Current limit setting
19. VBAT: Battery voltage monitor output
20. VCC2: Power supply input for internal circuitry

Functional Features

1. Charging Control: The BQ26221PWR provides precise control over the charging process, ensuring optimal battery performance and longevity.
2. Overvoltage and Overcurrent Protection: It safeguards the battery by monitoring and preventing voltage and current levels from exceeding safe limits.
3. Temperature Monitoring and Control: The IC continuously monitors the battery temperature and adjusts the charging parameters accordingly to prevent overheating.
4. Programmability: The PROG pin allows customization of various charging parameters, enabling compatibility with different battery chemistries and capacities.
5. Status Indication: The STAT pin provides real-time status information about the charging process, allowing users to monitor the battery's state.

Advantages and Disadvantages

Advantages

• Efficient and accurate battery charging
• Comprehensive protection mechanisms
• Compact and space-saving design
• Customizable charging parameters
• Real-time status indication

Disadvantages

• Limited to battery management applications
• Requires additional external components for complete battery management system implementation

Working Principles

The BQ26221PWR operates based on a sophisticated charging algorithm that regulates the charging current and voltage according to the battery's characteristics. It constantly monitors the battery's voltage, temperature, and charging status to ensure safe and efficient charging. The IC also incorporates protection mechanisms to prevent overcharging, overvoltage, and overcurrent conditions, thereby safeguarding the battery from potential damage.

Detailed Application Field Plans

The BQ26221PWR finds extensive application in various electronic devices that require battery charging and protection. Some of the key application fields include:

1. Smartphones and Tablets: Ensures safe and efficient charging of the built-in batteries in smartphones and tablets.
2. Laptops and Ultrabooks: Provides reliable battery management for portable computing devices.
3. Portable Power Banks: Enables efficient charging and protection of external power banks used for charging mobile devices on-the-go.
4. Wearable Devices: Facilitates battery management in smartwatches, fitness trackers, and other wearable gadgets.

Detailed and Complete Alternative Models

1. BQ24075RGTR: A similar battery management IC with integrated power path management and USB OTG support.
2. MAX17043G+T: An alternative IC offering fuel gauge functionality along with battery charging and protection features.
3. LTC4000-1: A versatile battery charger IC suitable for high-power applications, supporting multiple battery chemistries.

These alternative models provide similar functionalities to the BQ26221