Product description
The Qualcomm SMB-1351-0-49CWLNSP-TR-02-0-12 is a sophisticated battery management IC designed for precise control and monitoring of lithium-ion and lithium-polymer batteries. It is engineered to deliver high performance and safety in a compact form factor, making it suitable for a wide range of modern electronic devices.
Battery Management: The SMB-1351-0-49CWLNSP-TR-02-0-12 employs a constant current/constant voltage (CC/CV) charging approach, which ensures that the battery is charged in a controlled manner. The IC regulates the charging voltage to a standard 4.2V per cell, a typical requirement for Li-ion batteries, and provides adjustable charging currents to match different battery sizes and application needs. This approach helps in maintaining battery health and extending its overall lifespan.
Protection Mechanisms: Safety is a key aspect of the SMB-1351-0-49CWLNSP-TR-02-0-12. It includes several protection features:
Overcharge Protection: Ensures that the battery does not charge beyond its maximum safe voltage, preventing overcharge conditions that could damage the battery.
Over-discharge Protection: Prevents the battery from discharging below its safe minimum voltage, avoiding potential damage from excessive discharge.
Over-current Protection: Limits the current to safe levels to prevent overheating and damage to the IC and battery.
Short-circuit Protection: Provides a safeguard against short circuits, which could lead to significant damage to the IC or battery.
Thermal Management: The IC incorporates thermal management features to handle heat effectively. Thermal shutdown is included to protect the IC and device from overheating. If the IC’s temperature rises beyond safe operating limits, the thermal shutdown feature activates to prevent damage and ensure reliable operation.
Communication and Integration: The I2C interface of the SMB-1351-0-49CWLNSP-TR-02-0-12 allows for real-time communication with external microcontrollers or processors. This enables detailed monitoring of battery status, including charge levels and health, and supports dynamic adjustments to charging parameters based on real-time data, enhancing system flexibility and control.
Compact Design: Encased in a compact QFN package, the SMB-1351-0-49CWLNSP-TR-02-0-12 is designed to fit into space-constrained applications. This makes it ideal for integration into compact devices such as smartphones, tablets, and wearables, where efficient battery management is critical within a limited space.
Specification parameters
Input Voltage Range:
Typical Range: 3.5V to 5.5V, allowing the IC to work with various power sources and adapt to different application requirements.
Charging Current:
Programmable Charging Current: The IC supports adjustable charging currents, typically up to 1.5A or higher, depending on the application and battery specifications.
Charge Voltage Regulation:
Regulation Voltage: Typically set to 4.2V per cell, which is standard for Li-ion batteries, with adjustability to accommodate different battery types.
Protection Features:
Overcharge Protection: Prevents the battery from exceeding its maximum rated voltage during charging.
Over-discharge Protection: Protects the battery from discharging below safe voltage levels.
Over-current Protection: Limits current to safe levels to avoid overheating and damage.
Short-circuit Protection: Provides protection against short circuits that could damage the IC or the battery.
Communication Interface:
I2C Interface: Enables real-time communication with external controllers, facilitating detailed monitoring and management of the battery.
Thermal Management:
Thermal Shutdown: Activates if the IC’s temperature exceeds safe limits, preventing overheating and ensuring safe operation.
Package Type:
Package: QFN (Quad Flat No-Lead), offering a compact and efficient form factor for space-constrained designs.
