BQ29419PWR

Product Overview

Category

BQ29419PWR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for battery protection in various electronic devices.

Characteristics

• Voltage range: 2.5V to 18V
• Low quiescent current: 10µA (typical)
• Overvoltage protection
• Undervoltage lockout
• Short-circuit protection
• Thermal shutdown protection

Package

BQ29419PWR is available in a small outline package (SOP) with a width of 3.9mm and a length of 4.9mm.

Essence

The essence of BQ29419PWR lies in its ability to protect batteries from overvoltage, undervoltage, short-circuits, and thermal issues.

Packaging/Quantity

This IC is typically packaged in reels containing 2500 units.

Specifications

• Operating voltage range: 2.5V to 18V
• Quiescent current: 10µA (typical)
• Overvoltage threshold: 4.2V to 4.5V
• Undervoltage threshold: 2.2V to 2.5V
• Short-circuit detection delay: 7ms (typical)
• Thermal shutdown temperature: 150°C (typical)

Detailed Pin Configuration

BQ29419PWR has a total of 8 pins:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output
4. SCL: Serial clock input
5. OUT: Open-drain output
6. RST: Reset input
7. BAT: Battery voltage input
8. TS: Thermistor input

Functional Features

1. Overvoltage Protection: Monitors the battery voltage and disconnects it from the load when it exceeds the preset threshold.
2. Undervoltage Lockout: Prevents the battery from discharging below a safe voltage level.
3. Short-Circuit Protection: Detects excessive current flow and shuts down the circuit to prevent damage.
4. Thermal Shutdown Protection: Safeguards against overheating by disabling the circuit when the temperature exceeds the specified limit.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows compatibility with various battery types.
• Low quiescent current minimizes power consumption.
• Comprehensive protection features ensure the safety of the battery and connected devices.

Disadvantages

• Limited pin configuration may restrict its use in complex circuit designs.
• Lack of built-in communication interfaces limits its integration capabilities.

Working Principles

BQ29419PWR operates by continuously monitoring the battery voltage and comparing it to predefined thresholds. When an abnormal condition is detected, such as overvoltage or undervoltage, the IC takes appropriate action to protect the battery and connected circuitry. It achieves this through internal control logic and switches that disconnect the battery from the load or trigger other protective measures.

Detailed Application Field Plans

BQ29419PWR finds applications in various electronic devices that rely on batteries for power, including: - Portable consumer electronics (e.g., smartphones, tablets) - Medical devices - Industrial equipment - Automotive systems

Detailed and Complete Alternative Models

1. BQ29418PWR: Similar to BQ29419PWR but with a lower overvoltage threshold.
2. BQ29420PWR: Similar to BQ29419PWR but with a higher overvoltage threshold.
3. BQ29417PWR: Similar to BQ29419PWR but with additional communication interfaces.

These alternative models offer similar functionality with slight variations in specifications to cater to different application requirements.

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