BQ24401PWG4

Product Overview

Category

BQ24401PWG4 belongs to the category of integrated circuits (ICs) specifically designed for battery charging applications.

Use

This product is primarily used for charging rechargeable batteries, such as lithium-ion or nickel-metal hydride batteries, in various electronic devices.

Characteristics

• High charging efficiency
• Wide input voltage range
• Overvoltage protection
• Temperature monitoring and control
• Short-circuit protection
• Reverse polarity protection

Package

BQ24401PWG4 is available in a small-sized package, typically a 20-pin TSSOP (Thin Shrink Small Outline Package).

Essence

The essence of BQ24401PWG4 lies in its ability to efficiently charge batteries while ensuring safety and protection against potential hazards.

Packaging/Quantity

This product is usually packaged in reels or tubes, with a typical quantity of 250 units per reel or tube.

Specifications

• Input Voltage Range: 4.5V to 26V
• Charging Current Range: 10mA to 2A
• Operating Temperature Range: -40°C to +85°C
• Output Voltage Accuracy: ±1%
• Standby Current: <1µA

Detailed Pin Configuration

1. VCC: Power supply input
2. GND: Ground reference
3. BAT: Battery connection terminal
4. TS: Temperature sense input
5. PROG: Charge current programming pin
6. STAT: Status output pin
7. EN: Enable pin
8. ISET: Current sense resistor connection
9. SRN: Sense resistor negative terminal
10. SRP: Sense resistor positive terminal
11. VREF: Reference voltage output
12. VFB: Feedback voltage input
13. VREG: Regulated output voltage
14. VSS: Negative voltage supply
15. VDD: Positive voltage supply
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. NC: No connection

Functional Features

• Constant current and constant voltage charging modes
• Automatic battery detection
• Charge termination based on voltage and temperature thresholds
• LED indication for charging status
• Fault detection and reporting

Advantages and Disadvantages

Advantages

• High charging efficiency leads to faster charging times
• Wide input voltage range allows compatibility with various power sources
• Comprehensive protection features ensure safe charging
• Compact package size enables space-saving designs

Disadvantages

• Limited charging current range may not be suitable for high-capacity batteries
• Lack of advanced communication protocols for battery management systems

Working Principles

BQ24401PWG4 operates by regulating the charging current and voltage supplied to the battery. It employs a constant current mode initially to charge the battery rapidly until a predefined voltage threshold is reached. At this point, it switches to constant voltage mode to prevent overcharging. The device continuously monitors the battery temperature and adjusts the charging parameters accordingly to ensure safe operation.

Detailed Application Field Plans

BQ24401PWG4 finds applications in various electronic devices that require battery charging capabilities. Some common application fields include: - Portable consumer electronics (e.g., smartphones, tablets) - Wearable devices (e.g., smartwatches, fitness trackers) - Medical devices (e.g., portable medical monitors, insulin pumps) - Industrial equipment (e.g., handheld tools, wireless sensors)

Detailed and Complete Alternative Models

1. BQ2002SN: Similar battery charging IC with lower charging current range.
2. BQ24610RGER: Advanced battery charger with higher charging current capability and additional communication features.
3. MCP73871-2CCI/MLI: Alternative IC with similar charging characteristics and package size.

Note: This is not an exhaustive list, and there are several other alternative models available in the market.

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