BQ25703ARSNR

Product Overview

Category

BQ25703ARSNR belongs to the category of power management integrated circuits (PMICs).

Use

This PMIC is primarily used for battery charging and system power path management in portable electronic devices.

Characteristics

• Efficient charging: BQ25703ARSNR incorporates advanced charging algorithms to optimize charging efficiency.
• Flexible power path management: It allows seamless power delivery from multiple sources, such as AC adapter, USB Type-C, or a battery.
• Comprehensive protection features: The PMIC ensures safe charging by providing overvoltage protection, overcurrent protection, and thermal regulation.
• Compact package: BQ25703ARSNR comes in a small form factor package, making it suitable for space-constrained applications.
• High integration: It integrates various functions like voltage regulation, current sensing, and charging control into a single chip.

Package and Quantity

BQ25703ARSNR is available in a 32-pin VQFN package. It is typically sold in reels containing a quantity of 250 units.

Specifications

• Input voltage range: 3.5V to 24V
• Charging voltage range: 3.5V to 24V
• Charging current range: Up to 8A
• Operating temperature range: -40°C to 85°C
• Efficiency: Up to 95%
• Supported battery chemistries: Li-Ion, Li-Polymer, and other rechargeable battery types

Pin Configuration

The pin configuration of BQ25703ARSNR is as follows:

1. VIN: Input voltage
2. GND: Ground
3. TS: Thermistor input for thermal regulation
4. ISET: Current sense resistor connection
5. BAT: Battery connection
6. SYS: System output voltage
7. PG: Power good indicator
8. STAT: Charging status indicator
9. TS2: Second thermistor input
10. VBUS: USB Type-C power input
11. SDA: I2C data line
12. SCL: I2C clock line
13. INT: Interrupt output
14. ILIM: Input current limit setting
15. EN: Enable pin
16. D+/CC1: USB Type-C CC1 line
17. D-/CC2: USB Type-C CC2 line
18. SRN: Serial resistor network connection
19. SRP: Serial resistor programming pin
20. VREF: Reference voltage output

Functional Features

• Dynamic Power Path Management: BQ25703ARSNR enables simultaneous charging of the battery and powering the system, ensuring uninterrupted operation.
• Input Current Limiting: It allows setting a maximum input current limit to prevent overloading the power source.
• Battery Temperature Monitoring: The PMIC monitors the battery temperature to prevent overheating during charging.
• Charge Termination: BQ25703ARSNR terminates the charging process when the battery is fully charged, preventing overcharging and extending battery life.
• I2C Interface: It supports communication through the I2C interface, enabling control and monitoring of various charging parameters.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to faster charging times.
• Flexible power path management ensures uninterrupted device operation.
• Comprehensive protection features safeguard the battery and the device.
• Compact package size makes it suitable for space-constrained applications.
• Integration of multiple functions reduces component count and simplifies design.

Disadvantages

• Limited compatibility with certain battery chemistries or charging protocols.
• Relatively higher cost compared to simpler charging solutions.
• Requires additional external components for complete system integration.

Working Principles

BQ25703ARSNR operates by regulating the flow of power between the input source, battery, and system load. It employs advanced charging algorithms to optimize charging efficiency and protect the battery from overcharging or overheating. The PMIC dynamically manages power flow based on the input source availability and the system's power requirements.

Detailed Application Field Plans

BQ25703ARSNR finds applications in various portable electronic devices, including smartphones, tablets, laptops, and wearable devices. Its ability to handle multiple power sources and provide efficient charging makes it suitable for devices that require fast charging capabilities while maintaining uninterrupted operation.

Alternative Models

• BQ25892RSNR
• BQ25601RSNR
• BQ24296RGET
• BQ24075RGTR
• BQ25120YFPR

These alternative models offer similar functionality and can be considered as alternatives to BQ25703ARSNR based on specific application requirements.

In conclusion, BQ25703ARSNR is a power management integrated circuit designed for efficient battery charging and power path management in portable electronic devices. With its advanced features, compact package, and comprehensive protection mechanisms, it offers significant advantages in terms of charging efficiency and device reliability