BQ24202DGN

Product Overview

Category

BQ24202DGN belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This IC is commonly used in portable electronic devices, such as smartphones, tablets, and wearable devices, to efficiently charge lithium-ion batteries.

Characteristics

• High charging efficiency
• Wide input voltage range
• Programmable charge current
• Integrated power path management
• Thermal regulation and protection
• Small form factor

Package

BQ24202DGN is available in a small 8-pin plastic dual in-line package (PDIP).

Essence

The essence of BQ24202DGN lies in its ability to provide a reliable and efficient charging solution for lithium-ion batteries in portable electronic devices.

Packaging/Quantity

This IC is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.35V to 6.45V
• Charge Voltage Range: 3.5V to 4.44V
• Charge Current Range: 0.128A to 2A
• Operating Temperature Range: -40°C to +85°C
• Power Path Efficiency: Up to 95%
• Standby Current: < 100µA

Detailed Pin Configuration

1. VIN: Input voltage pin
2. GND: Ground pin
3. TS: Thermistor input pin
4. STAT: Status output pin
5. ISET: Charge current setting pin
6. PG: Power good output pin
7. VBAT: Battery voltage output pin
8. VOUT: Output voltage pin

Functional Features

• Constant current/constant voltage charging
• Automatic power path selection between input and battery
• Dynamic power management
• Overvoltage and overcurrent protection
• Thermal regulation and protection
• Charge termination based on battery voltage and temperature

Advantages and Disadvantages

Advantages

• High charging efficiency leads to faster charging times
• Wide input voltage range allows compatibility with various power sources
• Programmable charge current enables flexibility in charging different battery capacities
• Integrated power path management ensures uninterrupted device operation during charging
• Thermal regulation and protection prevent overheating and extend battery lifespan
• Small form factor saves space in compact electronic devices

Disadvantages

• Limited availability of alternative models from other manufacturers
• Relatively higher cost compared to generic charging ICs

Working Principles

BQ24202DGN operates by regulating the charging process of lithium-ion batteries. It employs a constant current/constant voltage charging algorithm, where the charge current is initially set to a maximum value and gradually reduced as the battery voltage approaches its peak. The IC also monitors the battery temperature and adjusts the charging parameters accordingly to ensure safe and efficient charging.

Detailed Application Field Plans

BQ24202DGN finds extensive application in various portable electronic devices, including smartphones, tablets, smartwatches, Bluetooth headsets, and other wearable devices. Its ability to provide efficient and reliable charging makes it an ideal choice for manufacturers aiming to enhance the user experience of their products.

Detailed and Complete Alternative Models

While BQ24202DGN is a popular choice for battery charging applications, there are several alternative models available in the market that offer similar functionality. Some notable alternatives include:

1. MCP73831: Microchip Technology
2. MAX1555: Maxim Integrated
3. LTC4054: Linear Technology
4. TPS2513: Texas Instruments
5. MP2617: Monolithic Power Systems

These alternative models provide comparable features and can be considered as substitutes for BQ24202DGN depending on specific requirements and availability.

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