BQ24751BRHDR

Product Overview

Category

The BQ24751BRHDR belongs to the category of power management integrated circuits (PMICs).

Use

This PMIC is specifically designed for use in battery charging applications.

Characteristics

• The BQ24751BRHDR offers high efficiency and accurate control for battery charging.
• It supports a wide input voltage range, making it suitable for various power sources.
• This PMIC incorporates advanced charging algorithms to optimize battery performance.
• It provides comprehensive protection features to ensure safe charging operations.

Package

The BQ24751BRHDR is available in a small outline package (SOT) with a thermal pad for enhanced heat dissipation.

Essence

The essence of the BQ24751BRHDR lies in its ability to efficiently and safely charge batteries while providing optimal performance.

Packaging/Quantity

This PMIC is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V to 24V
• Output Voltage Range: Programmable up to 25.2V
• Charging Current Range: Programmable up to 8A
• Efficiency: Up to 98%
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground pin
3. TS: Thermistor input pin for temperature monitoring
4. ACOK: AC adapter present output pin
5. ACSEL: AC adapter selection input pin
6. BAT: Battery voltage sense pin
7. SRN: System reset output pin
8. SDA: I2C data pin
9. SCL: I2C clock pin
10. INT: Interrupt output pin
11. ILIM: Charging current limit programming pin
12. PROG: Programming pin for various charging parameters
13. STAT1: Charging status output pin
14. STAT2: Charging status output pin
15. VREF: Reference voltage output pin
16. VDD: Power supply input pin

Functional Features

• Dynamic power management to optimize charging efficiency.
• Programmable charging profiles for different battery chemistries.
• Integrated protection features including overvoltage, overcurrent, and thermal shutdown.
• I2C interface for easy configuration and monitoring of charging parameters.
• System reset output for improved system reliability.

Advantages and Disadvantages

Advantages

• High charging efficiency leads to reduced power consumption.
• Wide input voltage range allows compatibility with various power sources.
• Comprehensive protection features ensure safe charging operations.
• Programmable charging profiles enable customization for different battery types.

Disadvantages

• Requires additional external components for complete charging circuit implementation.
• Limited availability of alternative models from other manufacturers.

Working Principles

The BQ24751BRHDR operates by regulating the charging current and voltage supplied to the battery. It utilizes advanced charging algorithms to optimize the charging process based on the battery chemistry and condition. The PMIC continuously monitors the battery voltage, temperature, and charging status to ensure safe and efficient charging. It also provides feedback to the system through the interrupt and status pins, allowing the host controller to monitor the charging progress.

Detailed Application Field Plans

The BQ24751BRHDR is widely used in various portable electronic devices, such as laptops, tablets, smartphones, and power banks. It is also employed in industrial applications where reliable and efficient battery charging is required, such as in medical devices, handheld instruments, and wireless communication systems.

Detailed and Complete Alternative Models

While the BQ24751BRHDR is a highly capable PMIC, there are alternative models available from other manufacturers that offer similar functionality. Some notable alternatives include:

1. LTC4015 from Linear Technology
2. MAX77827 from Maxim Integrated
3. ISL9238 from Intersil

These alternative models provide comparable features and performance, allowing designers to choose the most suitable PMIC for their specific application requirements.

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