BQ27545YZFR-G1

Product Overview

Category

The BQ27545YZFR-G1 belongs to the category of integrated circuits (ICs) specifically designed for battery management.

Use

This IC is primarily used for accurate fuel gauging and monitoring of single-cell Li-Ion and Li-Polymer batteries.

Characteristics

• Accurate battery capacity measurement
• Integrated voltage regulation
• Temperature sensing capabilities
• Advanced battery protection features
• Low power consumption
• Compact package size

Package

The BQ27545YZFR-G1 is available in a small form factor package, such as a 20-pin QFN (Quad Flat No-Lead) package.

Essence

The essence of the BQ27545YZFR-G1 lies in its ability to accurately measure and monitor the capacity of single-cell Li-Ion and Li-Polymer batteries, ensuring optimal performance and safety.

Packaging/Quantity

The BQ27545YZFR-G1 is typically supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Operating Voltage: 2.7V to 4.8V
• Battery Capacity Measurement Accuracy: ±1%
• Temperature Measurement Range: -40°C to +85°C
• Communication Interface: I2C
• Dimensions: 3mm x 3mm x 0.75mm

Detailed Pin Configuration

The BQ27545YZFR-G1 has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. VSS - Ground
2. SDA - I2C Serial Data
3. SCL - I2C Serial Clock
4. ALERT - Interrupt Output
5. TS - Temperature Sense Input
6. BAT - Battery Voltage Sense Input
7. SRP - System Reset Output
8. VDD - Power Supply Input
9. VSS - Ground
10. VSS - Ground
11. VSS - Ground
12. VSS - Ground
13. VSS - Ground
14. VSS - Ground
15. VSS - Ground
16. VSS - Ground
17. VSS - Ground
18. VSS - Ground
19. VSS - Ground
20. VSS - Ground

Functional Features

1. Accurate Fuel Gauging: The BQ27545YZFR-G1 provides precise measurement and estimation of battery capacity, allowing for accurate monitoring of remaining charge.

2. Voltage Regulation: Integrated voltage regulation ensures stable power supply to the connected device, preventing damage due to voltage fluctuations.

3. Temperature Sensing: The IC incorporates temperature sensing capabilities, enabling accurate temperature monitoring of the battery.

4. Battery Protection: The BQ27545YZFR-G1 offers advanced protection features such as overvoltage, undervoltage, and overcurrent protection, safeguarding the battery from potential damage.

5. Low Power Consumption: The IC itself consumes minimal power, ensuring efficient utilization of the battery's energy.

Advantages and Disadvantages

Advantages

• Accurate fuel gauging for precise battery capacity estimation
• Integrated voltage regulation for stable power supply
• Temperature sensing capabilities for accurate monitoring
• Advanced battery protection features for enhanced safety
• Low power consumption for efficient energy utilization

Disadvantages

• Limited to single-cell Li-Ion and Li-Polymer batteries
• Requires I2C communication interface compatibility

Working Principles

The BQ27545YZFR-G1 utilizes a combination of voltage and current measurements, along with sophisticated algorithms, to accurately estimate the remaining capacity of the connected battery. It continuously monitors the battery's voltage and current levels, compensating for factors such as temperature and discharge rate to provide precise fuel gauging.

Detailed Application Field Plans

The BQ27545YZFR-G1 finds applications in various fields, including but not limited to:

1. Portable Electronics: Used in smartphones, tablets, and portable gaming devices to accurately monitor battery capacity and optimize power management.

2. Wearable Devices: Integrated into smartwatches, fitness trackers, and other wearable gadgets to ensure accurate battery monitoring and efficient energy utilization.

3. Medical Devices: Employed in medical equipment such as portable monitors and infusion pumps to provide reliable battery capacity information and prevent unexpected shutdowns.

4. Internet of Things (IoT): Utilized in IoT devices like sensors and wireless modules to enable accurate battery monitoring and enhance overall system efficiency.

Detailed and Complete Alternative Models

1. BQ27441-G1: Similar to the BQ27545YZFR-G1, this IC offers accurate fuel gauging and battery protection features, but with a different pin configuration.

2. MAX17043G+T: An alternative IC that provides accurate fuel gauging and voltage regulation capabilities, suitable for single-cell