BQ29415PWG4

Product Overview

Category

BQ29415PWG4 belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

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

Characteristics

• Integrated circuit for battery protection
• Designed for lithium-ion and lithium-polymer batteries
• Protects against overcharging, over-discharging, and short-circuiting

Package

BQ29415PWG4 comes in a small outline package (SOP) with 20 pins.

Essence

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

Packaging/Quantity

BQ29415PWG4 is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply Voltage: 2.5V to 6V
• Operating Temperature Range: -40°C to +85°C
• Overcharge Detection Voltage: 4.25V to 4.35V (in 10mV steps)
• Overdischarge Detection Voltage: 2.0V to 3.0V (in 100mV steps)
• Short-Circuit Detection Delay Time: 1ms to 32ms (in 1ms steps)

Detailed Pin Configuration

1. VDD: Power supply input
2. GND: Ground reference
3. BAT: Battery connection
4. VC: Charge voltage control
5. VSS: Negative terminal of the sense resistor
6. VDDP: Power supply input for the internal pull-up resistors
7. SDA: Serial data input/output
8. SCL: Serial clock input
9. ALERT: Open-drain output for alert indication
10. TS: Temperature sense input
11. VSSP: Negative terminal of the pack voltage sense resistor
12. VCP: Charge pump capacitor connection
13. VDDC: Power supply input for the charge pump
14. VSSC: Ground reference for the charge pump
15. VREF: Reference voltage output
16. SRP: Positive terminal of the pack voltage sense resistor
17. SRN: Negative terminal of the sense resistor
18. VCC: Power supply input for the internal circuitry
19. VSSA: Ground reference for the analog circuitry
20. VCCA: Power supply input for the analog circuitry

Functional Features

• Overcharge protection: Prevents battery damage by monitoring and limiting the charging voltage.
• Overdischarge protection: Safeguards the battery by detecting low voltage levels and disconnecting the load.
• Short-circuit protection: Detects excessive current flow and interrupts the circuit to prevent damage.

Advantages and Disadvantages

Advantages

• Reliable battery protection against overcharging, over-discharging, and short-circuiting.
• Compact size and easy integration into battery-powered devices.
• Wide operating temperature range allows for versatile applications.

Disadvantages

• Limited to lithium-ion and lithium-polymer batteries.
• Requires careful consideration of voltage thresholds for optimal performance.

Working Principles

BQ29415PWG4 operates by continuously monitoring the battery voltage, charge/discharge currents, and temperature. It compares these parameters with predefined thresholds to determine if any protective action is required. When a potential hazard is detected, the IC triggers the appropriate protection mechanism, such as disconnecting the load or limiting the charging voltage.

Detailed Application Field Plans

1. Portable Electronics: BQ29415PWG4 is widely used in smartphones, tablets, and portable gaming devices to ensure safe battery operation.
2. Electric Vehicles: This IC plays a crucial role in electric vehicle battery management systems, protecting the battery pack from potential damage.
3. Power Banks: BQ29415PWG4 provides essential protection for power banks, preventing overcharging or over-discharging of the internal batteries.

Detailed and Complete Alternative Models

1. BQ29700: Similar battery protection IC with additional features like cell balancing and fuel gauge functionality.
2. BQ29209: Battery protection IC designed specifically for single-cell lithium-ion/polymer batteries.
3. BQ76930: Multi-cell battery monitor and protector suitable for applications requiring higher voltage and current ratings.

Note: The above alternative models are just a few examples; there are several other alternatives available in the market.

In conclusion, BQ29415PWG4 is an integrated circuit designed for battery protection, primarily used for safeguarding lithium-ion and lithium-polymer batteries. It offers reliable protection against overcharging, over-discharging, and short-circuiting.