Overview of S-8241 Series Battery Protection ICs
The S-8241 Series, developed by Seiko Instruments Inc., represents a portfolio of high-accuracy battery protection integrated circuits (ICs) designed specifically for single-cell lithium-ion/lithium polymer rechargeable battery packs. These robust ICs are engineered to safeguard battery packs against common risks such as overcharge, overdischarge, and overcurrent scenarios.
Key Features
The S-8241 Series boasts a series of notable features:
- High-Accuracy Voltage Detection Circuit: Precisely measures overcharge and overdischarge parameters, delivering accuracy within ±25 mV at +25°C and ±30 mV across a -5 to +55°C temperature range.
- Extensive Voltage Detection Range: Overcharge detection spans from 3.9V to 4.4V while overdischarge detection ranges from 2.0V to 3.0V, both customizable in set increments.
- Overcurrent Detection Features: Two-tier overcurrent detection is facilitated by an internal circuit, negating the need for external capacitors.
- High Voltage Tolerance: The VM and CO pins are capable of withstanding up to 26V, enhancing the durability of charger connections.
- Versatile Operational Functions: Incorporates a selectable 0V battery charging function, a charger detection function, and an abnormal charge current detection function.
- Low Power Consumption: Operational current consumption is modest, and a power-down mode further reduces consumption, showcasing the ICs’ efficiency.
- Wide Temperature Range: The series functions effectively within an ambient temperature range of -40°C to +85°C.
Customization and Safety Compliance
The S-8241 Series supports customization with selectable overcharge and overdischarge hysteresis settings, providing fine-tuning for various applications. Moreover, it fulfills contemporary environmental safety standards by being lead-free, 100% tin, and halogen-free.
Applications
This protection IC is ideal for lithium-ion and lithium-polymer rechargeable battery packs. With available packages including SOT-23-5 and SNT-6A, it allows for versatile implementation in different designs and form factors.
Internal Circuitry
The internal architecture of the S-8241 Series revealed in the block diagram showcases an advanced integration of delay circuits, clock generation, counter circuits, detection comparators for various protection measures, and specialized OV battery charging and inhibiting circuits. This intricate design is pivotal for ensuring the effective and reliable operation of the protection IC in various application scenarios.
Comprehensive protection, accuracy, low power consumption, and versatility make the S-8241 Series an essential component for designers and manufacturers prioritizing battery safety and performance.
References:
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