BQ29419PWG4 - English Editing Encyclopedia Entry

Product Overview

Category

BQ29419PWG4 belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This product is primarily used for protecting lithium-ion and lithium-polymer batteries from overcharging, over-discharging, and short-circuiting.

Characteristics

• Voltage range: 2.5V to 4.8V
• Low quiescent current: 10µA (typical)
• High accuracy voltage thresholds
• Built-in delay times for protection functions
• Small package size: PG-TSSOP-14
• RoHS compliant

Package and Quantity

The BQ29419PWG4 is available in a PG-TSSOP-14 package. It is typically sold in reels containing 2500 units per reel.

Specifications

• Supply voltage range: 2.5V to 4.8V
• Operating temperature range: -40°C to +85°C
• Overcharge detection voltage range: 3.9V to 4.6V
• Overdischarge detection voltage range: 2.0V to 3.1V
• Short-circuit detection delay time: 7ms (typical)
• Overcharge release voltage: 4.4V (typical)
• Overdischarge release voltage: 3.3V (typical)

Detailed Pin Configuration

The BQ29419PWG4 has a total of 14 pins, each serving a specific function. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. SDA: Serial data input/output
4. SCL: Serial clock input
5. ALERT: Open-drain output for fault indication
6. VSS: Negative voltage supply
7. VDDP: Positive voltage supply
8. BAT: Battery connection
9. VREF: Reference voltage output
10. OVP: Overvoltage protection input
11. UVLO: Undervoltage lockout input
12. SDO: Serial data output
13. NTC: Negative temperature coefficient input
14. TS: Thermistor input

Functional Features

The BQ29419PWG4 offers the following functional features:

1. Overcharge Protection: Monitors battery voltage and prevents overcharging by disconnecting the charging source.
2. Overdischarge Protection: Prevents excessive discharge of the battery by disconnecting the load when the voltage drops below a certain threshold.
3. Short-Circuit Protection: Detects short-circuits and disconnects the battery from the load to prevent damage.
4. Temperature Monitoring: Allows for temperature-based protection by monitoring the thermistor input.
5. Fault Indication: Provides an open-drain output (ALERT pin) to indicate fault conditions.

Advantages and Disadvantages

Advantages

• Wide voltage range compatibility
• High accuracy voltage thresholds ensure precise protection
• Low quiescent current minimizes power consumption
• Built-in delay times enhance protection effectiveness
• Small package size allows for space-efficient designs
• RoHS compliant, ensuring environmental friendliness

Disadvantages

• Limited to lithium-ion and lithium-polymer battery protection only
• Requires additional external components for complete battery protection system

Working Principles

The BQ29419PWG4 operates based on a combination of voltage monitoring and control logic. It continuously measures the battery voltage and compares it against predefined thresholds. When any of the thresholds are exceeded, the corresponding protection function is triggered, disconnecting the battery from the load or charging source.

Detailed Application Field Plans

The BQ29419PWG4 is widely used in various applications where lithium-ion or lithium-polymer batteries require protection. Some common application fields include: - Portable electronic devices (e.g., smartphones, tablets) - Power banks and portable chargers - Electric vehicles and hybrid electric vehicles - Energy storage systems

Detailed and Complete Alternative Models

1. BQ29418PWG4: Similar to BQ29419PWG4 but with a different voltage range.
2. BQ29417PWG4: Provides additional features such as overtemperature protection.
3. BQ29416PWG4: Offers enhanced accuracy and precision in voltage monitoring.

These alternative models can be considered based on specific requirements and compatibility with the target application.

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