The S-8253 series from SII Semiconductor Corporation is a high-precision voltage detector IC designed for lithium-ion rechargeable battery protection. It is a critical component in ensuring the safe and efficient operation of battery-powered devices by monitoring cell voltage and preventing overcharge, overdischarge, and overcurrent conditions. This particular model, S-8253AAC-T8T1S, is part of a family of similar devices with varying detection and release voltage thresholds to suit different battery chemistries and system requirements.

Applications

• Lithium-ion battery packs for mobile phones
• Battery packs for smartphones
• Power tools using lithium-ion batteries
• Battery-powered handheld devices
• Backup power supplies

Features

• High-accuracy voltage detection: Ensures precise monitoring of battery voltage levels.
• Low current consumption: Minimizes the drain on the battery, extending battery life.
• Overcharge detection: Prevents damage to the battery from excessive charging voltage.
• Overdischarge detection: Protects the battery from being discharged below a safe voltage level.
• Overcurrent detection: Safeguards the battery and connected circuitry from excessive current flow.
• Short-circuit protection: Provides an additional layer of protection against short circuits.
• Small package size: Allows for compact designs in portable devices.
• Wide operating temperature range: Ensures reliable operation in various environmental conditions.

Benefits

• Enhanced battery safety: Prevents overcharge, overdischarge, and overcurrent, reducing the risk of battery damage or failure.
• Extended battery life: Optimizes battery usage by preventing operation outside of safe voltage and current limits.
• Improved device reliability: Protects the battery and connected circuitry from damage, enhancing the overall reliability of the device.
• Reduced system cost: Integrates multiple protection functions into a single IC, simplifying the design and reducing the number of external components required.
• Compact design: Small package size enables the design of smaller and more portable devices.

Additional Details

The S-8253AAC-T8T1S typically includes an overcharge detection voltage, an overdischarge detection voltage, and an overcurrent detection voltage, all pre-set to specific values. The exact values for these thresholds are specified in the datasheet. The device also features a charge/discharge control pin that can be used to disconnect the battery from the charging or discharging circuit in the event of a fault condition. This IC uses a CMOS process to achieve low power consumption and high accuracy. The operating temperature range is typically -40°C to +85°C. It is usually supplied in a thin 8-pin package.