BQ29419PW

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Battery Protection and Monitoring
• Characteristics: High Accuracy, Low Power Consumption
• Package: PowerPAD™ TSSOP
• Essence: Battery Safety and Performance Optimization
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 2.5V to 16V
• Overvoltage Threshold: Programmable from 2.8V to 4.6V
• Undervoltage Threshold: Programmable from 1.8V to 3.9V
• Overcurrent Threshold: Programmable from 10mV to 80mV
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ29419PW has a total of 20 pins. The pin configuration is as follows:

1. VDD: Power Supply Input
2. GND: Ground
3. SDA: Serial Data Input/Output
4. SCL: Serial Clock Input
5. ALERT: Open-Drain Output for Alert Indication
6. VSS: Negative Terminal of the Battery
7. VCC: Positive Terminal of the Battery
8. VREF: Reference Voltage Output
9. BAT: Battery Voltage Sense Input
10. TS: Thermistor Input
11. SRP: System Reset Output
12. SRN: System Reset Input
13. DSG: Discharge Control Output
14. CHG: Charge Control Output
15. VREG: Regulated Output Voltage
16. VREG: Regulated Output Voltage
17. VREG: Regulated Output Voltage
18. VREG: Regulated Output Voltage
19. VREG: Regulated Output Voltage
20. VREG: Regulated Output Voltage

Functional Features

• Overvoltage Protection: Monitors battery voltage and disconnects the load when it exceeds the programmed threshold.
• Undervoltage Protection: Cuts off the load when the battery voltage falls below the set threshold to prevent deep discharge.
• Overcurrent Protection: Detects excessive current flow and interrupts the circuit to avoid damage.
• Temperature Monitoring: Measures the battery temperature using an external thermistor.
• Charge and Discharge Control: Controls the charging and discharging of the battery to optimize its performance and lifespan.

Advantages and Disadvantages

Advantages: - High accuracy in monitoring and protection functions. - Low power consumption, ensuring minimal impact on battery life. - Programmable thresholds allow customization for different battery types and applications.

Disadvantages: - Limited input voltage range may not be suitable for certain high-voltage applications. - Requires an external thermistor for temperature monitoring.

Working Principles

The BQ29419PW operates by continuously monitoring the battery voltage, current, and temperature. It compares these values with the programmed thresholds to determine if any protection action is required. When a fault condition is detected, such as overvoltage, undervoltage, or overcurrent, the IC triggers the appropriate control outputs to protect the battery and connected circuitry.

Detailed Application Field Plans

The BQ29419PW is widely used in various battery-powered systems, including: 1. Portable Electronics: Smartphones, tablets, laptops, and portable gaming devices. 2. Electric Vehicles: Battery management systems for electric cars, bikes, and scooters. 3. Renewable Energy Systems: Solar power storage and management systems. 4. Industrial Equipment: Battery-powered tools, robotics, and automation systems. 5. Medical Devices: Portable medical equipment and patient monitoring devices.

Detailed and Complete Alternative Models

1. BQ29412PW: Similar functionality but with a lower input voltage range (2.5V to 10V).
2. BQ29414PW: Higher input voltage range (2.5V to 18V) and additional features like short-circuit protection.
3. BQ29416PW: Enhanced overcurrent protection with a programmable threshold up to 160mV.

These alternative models offer different specifications and features to cater to specific application requirements.

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