BQ294533DRVT - English Editing Encyclopedia Entry

Product Overview

Category

BQ294533DRVT belongs to the category of integrated circuits (ICs) specifically designed for battery protection.

Use

This IC 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)
• Overcharge detection voltage: 4.35V (typical)
• Overdischarge detection voltage: 2.4V (typical)
• Short-circuit protection threshold: 100mΩ (typical)

Package

The BQ294533DRVT comes in a small outline package (SOT-23-6) which is compact and suitable for space-constrained applications.

Essence

The essence of this product lies in its ability to safeguard lithium-ion and lithium-polymer batteries by monitoring their voltage levels and preventing potential damage caused by overcharging, over-discharging, or short-circuiting.

Packaging/Quantity

The BQ294533DRVT is typically packaged in reels containing 3000 units per reel.

Specifications

• Operating temperature range: -40°C to +85°C
• Supply voltage range: 2.5V to 4.8V
• Overcharge detection voltage accuracy: ±25mV (typical)
• Overdischarge detection voltage accuracy: ±50mV (typical)
• Short-circuit protection delay time: 7ms (typical)
• Short-circuit protection release time: 1s (typical)

Detailed Pin Configuration

The BQ294533DRVT has six pins arranged as follows:

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| | | 1 2 | | | | 3 4 | |___________| 5 6 ```

Pin Configuration: 1. VCC: Supply voltage input 2. GND: Ground reference 3. BAT: Battery connection 4. OUT: Output for external control or indication 5. SDA: Serial data input/output (I2C interface) 6. SCL: Serial clock input (I2C interface)

Functional Features

• Overcharge protection: Monitors battery voltage and disconnects the charging source when it exceeds the predefined threshold.
• Overdischarge protection: Prevents excessive discharge by disconnecting the load when the battery voltage drops below a certain level.
• Short-circuit protection: Detects abnormal current flow and shuts off the circuit to prevent damage to the battery and connected devices.
• I2C interface: Allows communication with a microcontroller for configuration and monitoring purposes.

Advantages and Disadvantages

Advantages

• Compact package suitable for space-constrained applications.
• Wide operating temperature range enables usage in various environments.
• Accurate voltage detection ensures reliable battery protection.
• Low quiescent current minimizes power consumption.

Disadvantages

• Limited to lithium-ion and lithium-polymer battery protection only.
• Requires an external microcontroller for configuration and monitoring.

Working Principles

The BQ294533DRVT operates based on the principle of voltage monitoring. It continuously measures the battery voltage and compares it against predefined thresholds for overcharge and overdischarge protection. When these thresholds are exceeded, the IC disconnects the charging source or load to prevent potential damage. The short-circuit protection feature monitors the current flow and quickly shuts off the circuit in case of abnormal current spikes.

Detailed Application Field Plans

The BQ294533DRVT is widely used in portable electronic devices, such as smartphones, tablets, and laptops, where lithium-ion or lithium-polymer batteries are employed. It ensures the safety and longevity of these batteries by providing reliable protection against overcharging, over-discharging, and short-circuiting.

Detailed and Complete Alternative Models

• BQ294533DRVR: Similar to BQ294533DRVT but comes in a smaller package (SOT-23-5).
• BQ294533DRVRG4: Same as BQ294533DRVR with an extended operating temperature range (-40°C to +125°C).

These alternative models offer similar functionality and can be chosen based on specific application requirements.

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