BQ24304DSGR

Product Overview

Category

BQ24304DSGR belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is primarily used for battery charging and protection in portable electronic devices such as smartphones, tablets, and wearable devices.

Characteristics

• Efficient charging: The BQ24304DSGR offers high-efficiency charging capabilities, ensuring optimal use of power.
• Protection features: It provides various protection mechanisms, including overvoltage protection, overcurrent protection, and thermal shutdown, safeguarding the device and battery from potential damage.
• Compact package: The IC comes in a small form factor package, making it suitable for space-constrained designs.
• Low power consumption: It has low quiescent current consumption, minimizing power loss during standby or idle modes.

Package and Quantity

The BQ24304DSGR is available in a small 10-pin VSON package. It is typically sold in reels containing a specified quantity, usually around 3000 units per reel.

Specifications

• Input voltage range: 3.5V - 6.45V
• Charging voltage: Programmable from 3.5V to 4.44V
• Charging current: Programmable up to 2A
• Operating temperature range: -40°C to +85°C
• Quiescent current: Less than 50µA
• Overvoltage protection threshold: Programmable from 4.5V to 6.45V
• Overcurrent protection threshold: Programmable up to 2.8A

Pin Configuration

The BQ24304DSGR has ten pins with the following functions:

1. VIN: Input voltage pin
2. GND: Ground reference pin
3. BAT: Battery connection pin
4. TS: Thermal shutdown pin
5. VBUS: USB voltage input pin
6. STAT: Status output pin
7. ISET: Charging current setting pin
8. PROG: Programming pin for various features
9. PGND: Power ground reference pin
10. VOUT: Output voltage pin

Functional Features

1. Overvoltage Protection: The IC monitors the input voltage and disconnects the battery if it exceeds the programmed threshold, preventing damage to the device.
2. Overcurrent Protection: It detects excessive charging currents and interrupts the charging process to avoid potential hazards.
3. Thermal Shutdown: In case of excessive temperature rise, the IC shuts down to prevent overheating and protect the device and battery.
4. Charging Current Control: The charging current can be programmed using the ISET pin, allowing flexibility in charging different battery types.
5. Status Indication: The STAT pin provides information about the charging status, enabling the device to display appropriate notifications.

Advantages and Disadvantages

Advantages

• Efficient charging ensures faster battery replenishment.
• Comprehensive protection mechanisms safeguard the device and battery from potential damage.
• Small package size enables integration into compact designs.
• Low power consumption minimizes energy wastage during idle periods.

Disadvantages

• Limited programmability options compared to more advanced power management ICs.
• May require additional external components for certain applications.

Working Principles

The BQ24304DSGR operates by monitoring the input voltage, battery voltage, and charging current. It uses these parameters to control the charging process and ensure safe operation. The IC continuously checks for overvoltage, overcurrent, and thermal conditions, taking appropriate actions to protect the device and battery.

Application Field Plans

The BQ24304DSGR is widely used in various portable electronic devices that require battery charging and protection. Some common application fields include: - Smartphones and tablets - Wearable devices (smartwatches, fitness trackers) - Portable gaming consoles - Bluetooth headphones and speakers - Portable medical devices

Alternative Models

1. BQ24308DSGR: Similar to BQ24304DSGR but with additional features such as reverse current blocking and USB OTG support.
2. BQ24075RGTR: A power management IC with integrated battery charging capabilities suitable for similar applications.
3. MCP73831T-2ACI/OT: Another IC designed for single-cell Li-ion/Li-polymer battery charging applications.

These alternative models offer similar functionalities and can be considered based on specific design requirements.

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