S-8254AAEFT-TB-U

Product Overview

Category

The S-8254AAEFT-TB-U belongs to the category of integrated circuits (ICs) and specifically falls under the battery protection ICs.

Use

This product is primarily used for protecting rechargeable lithium-ion batteries from overcharging, over-discharging, and overcurrent conditions. It ensures the safe and efficient operation of lithium-ion batteries in various electronic devices.

Characteristics

• Battery protection: The S-8254AAEFT-TB-U provides comprehensive protection for lithium-ion batteries, safeguarding them against potential hazards.
• High accuracy: This IC offers precise voltage detection and control, ensuring optimal battery performance.
• Low power consumption: The S-8254AAEFT-TB-U minimizes energy consumption, enhancing battery life.
• Compact package: It comes in a small form factor, making it suitable for space-constrained applications.
• RoHS compliant: The product adheres to the Restriction of Hazardous Substances directive, ensuring environmental friendliness.

Package and Quantity

The S-8254AAEFT-TB-U is available in a compact Thin Small Outline Package (TSOP), which facilitates easy integration into electronic devices. It is typically sold in reels containing a specified quantity, such as 3,000 units per reel.

Specifications

• Input voltage range: 2.5V - 6.0V
• Overcharge detection voltage: 4.25V ± 0.05V
• Overdischarge detection voltage: 2.4V ± 0.08V
• Overcurrent detection voltage: 0.15V ± 0.02V
• Operating temperature range: -40°C to +85°C
• Standby current: 0.1µA (typical)
• Dimensions: 4.4mm x 2.9mm x 1.1mm

Detailed Pin Configuration

The S-8254AAEFT-TB-U features the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. CHG: Charge control terminal
4. DSG: Discharge control terminal
5. OVP: Overvoltage protection terminal
6. OCP: Overcurrent protection terminal
7. NTC: Negative temperature coefficient terminal
8. THERM: Thermistor input terminal

Functional Features

1. Overcharge protection: The IC monitors the battery voltage and disconnects the charging circuit when it exceeds the safe threshold, preventing overcharging.
2. Overdischarge protection: It detects low battery voltage and cuts off the discharge circuit to prevent excessive discharge, which can damage the battery.
3. Overcurrent protection: The S-8254AAEFT-TB-U safeguards the battery by interrupting the current flow when it exceeds a predefined limit, protecting both the battery and the device.
4. Temperature monitoring: It incorporates a negative temperature coefficient (NTC) terminal for connecting an external thermistor, enabling temperature-based protection.
5. Fast response time: The IC quickly responds to abnormal conditions, ensuring timely protection activation.

Advantages and Disadvantages

Advantages

• Comprehensive battery protection
• High accuracy voltage detection
• Low power consumption
• Compact package size
• RoHS compliant

Disadvantages

• Limited to lithium-ion battery protection only
• Requires additional external components for temperature monitoring

Working Principles

The S-8254AAEFT-TB-U operates based on a combination of voltage detection and control mechanisms. It continuously monitors the battery voltage and compares it with predefined thresholds for overcharge, overdischarge, and overcurrent conditions. When any of these thresholds are exceeded, the IC triggers the corresponding protection mechanism, disconnecting the charging or discharging circuit to prevent potential damage to the battery.

Detailed Application Field Plans

The S-8254AAEFT-TB-U finds applications in various electronic devices utilizing lithium-ion batteries. Some of the common application fields include:

1. Portable electronics: Smartphones, tablets, laptops, and digital cameras.
2. Power tools: Cordless drills, electric screwdrivers, and garden equipment.
3. Electric vehicles: Electric bikes, scooters, and small electric cars.
4. Energy storage systems: Battery banks and backup power supplies.

Detailed and Complete Alternative Models

1. S-8254AABFT-TB-G: Similar to S-8254AAEFT-TB-U but with a different package type (SSOP).
2. S-8254AACFT-TB-U: Offers additional features like short-circuit protection and cell balancing.
3. S-8254AADFT-TB-G: Provides enhanced overcurrent detection accuracy and adjustable voltage thresholds.

These alternative models offer similar functionality and can be considered as alternatives based on specific requirements and compatibility with