Product description
The Qualcomm SMB-1351-0-49CWLNSP-HR-02-0-14 is a high-performance battery management integrated circuit designed to deliver precise control and monitoring for lithium-ion and lithium-polymer batteries. Its combination of advanced features and compact design makes it suitable for a broad range of modern electronic devices.
Battery Management: The IC uses a constant current/constant voltage (CC/CV) charging approach, maintaining optimal battery health and performance. It regulates the charging voltage to a standard 4.2V per cell and supports adjustable charging currents, typically up to 1.5A or more. This flexibility ensures compatibility with various battery types and sizes, optimizing charging efficiency and safety.
Protection Mechanisms: The SMB-1351-0-49CWLNSP-HR-02-0-14 incorporates several critical safety features to protect the battery and the IC:
Overcharge Protection: Prevents excessive charging beyond the battery’s maximum safe voltage.
Over-discharge Protection: Avoids discharging the battery below its minimum safe voltage, which could cause damage.
Over-current Protection: Controls the current flow to prevent overheating and damage to both the IC and the battery.
Short-circuit Protection: Safeguards against short circuits that could significantly damage the IC or battery.
Thermal Management: To prevent overheating, the IC features thermal shutdown functionality. This protective mechanism activates if the IC’s temperature exceeds safe operating limits, thus avoiding thermal damage and ensuring stable performance.
Communication and Integration: The SMB-1351-0-49CWLNSP-HR-02-0-14 includes an I2C communication interface for efficient data exchange with external microcontrollers or processors. This interface supports real-time monitoring and dynamic adjustment of battery parameters, offering enhanced control over the battery management process.
Compact Design: Housed in a QFN package, the IC is well-suited for integration into compact electronic devices where space is limited. Its small footprint makes it ideal for use in devices such as smartphones, tablets, and wearables, where efficient space utilization and effective battery management are critical.
Specification parameters
Input Voltage Range:
Range: 3.5V to 5.5V, allowing compatibility with a variety of power sources and application requirements.
Charging Current:
Adjustable Charging Current: Supports currents up to 1.5A or higher, providing flexibility to meet specific battery and application needs.
Charge Voltage Regulation:
Regulation Voltage: Typically set to 4.2V per cell, which is standard for Li-ion batteries. The IC also allows for voltage adjustment to accommodate different battery specifications.
Protection Features:
Overcharge Protection: Ensures that the battery does not exceed its maximum safe voltage during charging.
Over-discharge Protection: Prevents the battery from discharging below its minimum safe voltage.
Over-current Protection: Limits current to prevent overheating and potential damage.
Short-circuit Protection: Provides protection against short circuits that could cause significant damage.
Communication Interface:
I2C Interface: Enables real-time data exchange with external controllers for effective monitoring and management of battery status.
Thermal Management:
Thermal Shutdown: Engages if the IC’s temperature exceeds safe thresholds, ensuring protection against overheating.
Package Type:
Package: QFN (Quad Flat No-Lead), designed for compact and efficient integration into space-constrained applications.
