BQ29310PWRG4 - English Editing Encyclopedia Entry

Product Overview

Category

The BQ29310PWRG4 belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This IC is primarily used for protecting lithium-ion and lithium-polymer batteries from overcharging, over-discharging, and short-circuiting. It ensures the safe and efficient operation of battery-powered devices.

Characteristics

• Overvoltage protection: Prevents the battery voltage from exceeding a safe threshold.
• Undervoltage protection: Safeguards against excessive discharge, preventing damage to the battery.
• Short-circuit protection: Detects and prevents short circuits, ensuring the battery's integrity.
• Temperature monitoring: Monitors the battery temperature to prevent overheating.
• Fault detection: Identifies and reports any faults or abnormalities in the battery system.

Package and Quantity

The BQ29310PWRG4 is available in a small outline package (SOP) with 16 pins. It is typically sold in reels containing 250 units per reel.

Specifications

• Supply voltage range: 2.5V to 28V
• Operating temperature range: -40°C to +85°C
• Quiescent current: 20µA (typical)
• Overvoltage threshold: Adjustable from 3V to 5V
• Undervoltage threshold: Adjustable from 1.8V to 3.6V
• Short-circuit detection threshold: Adjustable from 10mV to 100mV

Pin Configuration

The BQ29310PWRG4 features the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output for communication
4. SCL: Serial clock input for communication
5. ALERT: Open-drain output for fault indication
6. VSS: Negative supply input
7. BAT: Battery voltage input
8. OV: Overvoltage threshold adjustment pin
9. UV: Undervoltage threshold adjustment pin
10. SC: Short-circuit detection threshold adjustment pin
11. TS: Temperature sense input
12. SRN: Serial reset input
13. SRO: Serial reset output
14. SCD: Short-circuit detection output
15. OVC: Overvoltage comparator output
16. UVC: Undervoltage comparator output

Functional Features

1. Battery Protection: The BQ29310PWRG4 provides comprehensive protection for lithium-ion and lithium-polymer batteries, ensuring their safe operation.
2. Adjustable Thresholds: The overvoltage, undervoltage, and short-circuit detection thresholds can be adjusted to suit specific battery requirements.
3. Temperature Monitoring: The IC includes a temperature sense input to monitor the battery's temperature and prevent overheating.
4. Fault Detection: It detects and reports various faults, such as overvoltage, undervoltage, and short circuits, through the ALERT pin.

Advantages and Disadvantages

Advantages

• Robust battery protection against overcharging, over-discharging, and short-circuits.
• Adjustable thresholds allow customization for different battery types and applications.
• Low quiescent current minimizes power consumption.
• Compact package size enables integration into space-constrained designs.

Disadvantages

• Limited to lithium-ion and lithium-polymer battery protection; not suitable for other battery chemistries.
• Requires external components for complete battery protection circuit implementation.
• May require additional thermal management measures for high-power applications.

Working Principles

The BQ29310PWRG4 operates by continuously monitoring the battery voltage, temperature, and current. It compares these parameters against the user-adjustable thresholds to detect potential faults or abnormal conditions. When a fault is detected, the IC triggers the appropriate protection mechanism, such as disconnecting the battery from the load or activating a short-circuit protection circuit.

Application Field Plans

The BQ29310PWRG4 finds applications in various battery-powered devices, including: 1. Portable electronic devices (e.g., smartphones, tablets, laptops) 2. Electric vehicles and hybrid electric vehicles 3. Power tools and cordless equipment 4. Energy storage systems 5. Medical devices 6. Uninterruptible power supplies (UPS)

Alternative Models

For battery protection purposes, alternative models to the BQ29310PWRG4 include: - BQ29700: Offers similar features with additional cell balancing capabilities. - MAX14920: Provides battery protection with integrated communication interface. - LTC6804: Suitable for multi-cell battery packs with advanced monitoring capabilities.

Please note that the selection of an alternative model should be based on specific application requirements and compatibility considerations.

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