BQ2003STRG4 - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Battery Charge Management

Characteristics: - High accuracy battery charge management - Fast charging capability - Temperature and voltage monitoring - Overcharge protection - Under-voltage lockout - Small form factor

Package: SOT-23-6

Essence: The BQ2003STRG4 is an integrated circuit designed for battery charge management. It provides accurate and efficient charging capabilities while ensuring the safety of the battery.

Packaging/Quantity: The BQ2003STRG4 is available in a SOT-23-6 package. It is typically sold in reels containing multiple units.

Specifications

• Input Voltage Range: 4.5V to 26V
• Charging Current Range: 10mA to 2A
• Operating Temperature Range: -40°C to +85°C
• Accuracy:
  • Voltage Regulation: ±1%
  • Current Regulation: ±5%
• Standby Current: 50µA (typical)
• Charge Termination Options: Timer, Voltage, or Temperature

Detailed Pin Configuration

The BQ2003STRG4 has six pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| BAT VSS |-- Pin 2: Battery Connection (BAT) --| TS PRO |-- Pin 3: Temperature Sense (TS) --| VFB VDD |-- Pin 4: Feedback Voltage (VFB) --| ISET STAT|-- Pin 5: Current Set (ISET) and Status Output (STAT) --| NC |-- Pin 6: No Connection (NC) |___________| ```

Functional Features

1. Accurate Charging: The BQ2003STRG4 ensures precise battery charging by regulating voltage and current with high accuracy.

2. Fast Charging Capability: It supports fast charging, allowing batteries to be charged quickly and efficiently.

3. Temperature and Voltage Monitoring: The IC continuously monitors the battery temperature and voltage to prevent overcharging or overheating.

4. Overcharge Protection: The BQ2003STRG4 includes built-in protection mechanisms to prevent overcharging, ensuring the safety and longevity of the battery.

5. Under-Voltage Lockout: It features under-voltage lockout functionality, which prevents charging when the battery voltage is below a certain threshold.

Advantages and Disadvantages

Advantages: - High accuracy charging - Fast charging capability - Comprehensive protection features - Small form factor for space-constrained applications

Disadvantages: - Limited charging current range (10mA to 2A) - Requires external components for complete charging system implementation

Working Principles

The BQ2003STRG4 operates based on a constant voltage and constant current charging algorithm. It regulates the charging voltage and current according to the battery's requirements. The IC continuously monitors the battery's temperature and voltage to ensure safe and efficient charging. When the battery reaches the desired charge level, the charging process is terminated.

Detailed Application Field Plans

The BQ2003STRG4 is widely used in various battery-powered applications, including: - Portable electronic devices (e.g., smartphones, tablets) - Wireless communication devices - Medical devices - Power tools - Electric vehicles

Detailed and Complete Alternative Models

1. BQ2002SN: Similar to BQ2003STRG4, but with a different pin configuration.
2. BQ2004SN: Provides additional features such as battery authentication and data logging.
3. BQ2005SN: Supports higher charging current range (up to 4A) for faster charging.

These alternative models offer similar functionality and can be considered as alternatives to the BQ2003STRG4 based on specific application requirements.

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