BQ29412PWG4 - English Editing Encyclopedia Entry

Product Overview

Category

BQ29412PWG4 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

• Designed for battery protection applications
• Provides overcharge, over-discharge, and short-circuit protection
• Low power consumption
• High accuracy in voltage detection
• Small form factor
• RoHS compliant

Package

The BQ29412PWG4 comes in a small outline package (SOP) with 20 pins.

Essence

The essence of the BQ29412PWG4 lies in its ability to safeguard lithium-ion and lithium-polymer batteries by preventing potential hazards such as overcharging, over-discharging, and short-circuits.

Packaging/Quantity

The BQ29412PWG4 is typically sold in reels or tubes, with each reel containing 250 units.

Specifications

• Operating Voltage Range: 2.5V to 6.5V
• Overvoltage Threshold: 4.1V to 4.5V (adjustable)
• Undervoltage Threshold: 2.0V to 3.5V (adjustable)
• Overcurrent Detection Threshold: 50mV to 100mV (adjustable)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The BQ29412PWG4 has a total of 20 pins, each serving a specific function. The pin configuration is as follows:

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. VC1: Cell 1 voltage measurement
5. VC2: Cell 2 voltage measurement
6. VC3: Cell 3 voltage measurement
7. VC4: Cell 4 voltage measurement
8. VC5: Cell 5 voltage measurement
9. VC6: Cell 6 voltage measurement
10. VSS: Negative terminal of the battery
11. VREF: Reference voltage output
12. SDA: Serial data input/output
13. SCL: Serial clock input
14. ALERT: Alert output
15. TS: Temperature sense input
16. SRP: System reset output
17. SRN: System reset output
18. COUT: Capacitor connection for delay time
19. VDDP: Power supply input for internal circuitry
20. VSSP: Ground reference for internal circuitry

Functional Features

The BQ29412PWG4 offers several functional features, including:

• Overcharge protection: Prevents the battery from being charged beyond safe limits.
• Over-discharge protection: Safeguards the battery by preventing excessive discharge.
• Short-circuit protection: Detects and protects against short-circuits in the battery circuit.
• Temperature monitoring: Monitors the battery temperature to prevent overheating.

Advantages and Disadvantages

Advantages

• Provides comprehensive protection for lithium-ion and lithium-polymer batteries.
• High accuracy in voltage detection ensures precise protection thresholds.
• Low power consumption minimizes energy loss.
• Small form factor allows for easy integration into various battery-powered devices.

Disadvantages

• Limited to use with lithium-ion and lithium-polymer batteries only.
• Requires careful configuration of protection thresholds for optimal performance.

Working Principles

The BQ29412PWG4 operates based on a combination of voltage and current sensing techniques. It continuously monitors the battery voltage and compares it to pre-set thresholds. If any of the thresholds are exceeded, the IC triggers the appropriate protection mechanism to prevent damage to the battery.

Detailed Application Field Plans

The BQ29412PWG4 finds applications in various fields, including: - Portable electronic devices - Electric vehicles - Power tools - Energy storage systems

Detailed and Complete Alternative Models

1. BQ29700: Offers similar battery protection features with additional support for higher cell count configurations.
2. BQ29209: Provides battery protection for single-cell lithium-ion batteries with integrated FETs for overcharge and over-discharge protection.
3. BQ76930: Designed for multi-cell lithium-ion or lithium-polymer battery packs, offering comprehensive protection and monitoring capabilities.

These alternative models offer similar functionality to the BQ29412PWG4 but may have different pin configurations and specifications.

In conclusion, the BQ29412PWG4 is a highly reliable integrated circuit designed for battery protection in lithium-ion and lithium-polymer batteries. Its compact size, low power consumption, and accurate voltage detection make it an ideal choice for various portable electronic devices, electric vehicles, power tools