The SMB345ET-1850Y is a battery charger integrated circuit (IC) manufactured by Qualcomm. This IC is designed for charging single-cell lithium-ion (Li-Ion) or lithium-polymer (Li-Po) batteries in portable devices. It supports various charging modes and includes safety features to protect the battery and the device.

Applications:

• Smartphones: Used in smartphones for charging the internal Li-Ion or Li-Po battery.
• Tablets: Employed in tablets for charging the battery.
• Wearable Devices: Integrated into smartwatches, fitness trackers, and other wearable devices for battery charging.
• Portable Media Players: Used in portable media players for charging the battery.
• Power Banks: Employed in power banks for charging the internal batteries.

Features:

• Single-Cell Li-Ion/Li-Po Battery Charging: Designed specifically for charging single-cell Li-Ion or Li-Po batteries.
• Programmable Charging Current: Allows for adjusting the charging current to match the battery specifications.
• Input Overvoltage Protection (OVP): Protects the IC and the battery from excessive input voltage.
• Battery Overvoltage Protection (OVP): Prevents the battery from being overcharged.
• Thermal Shutdown: Shuts down the IC if the temperature exceeds a safe level.

Benefits:

• Fast and Efficient Charging: Provides fast and efficient charging of Li-Ion/Li-Po batteries.
• Battery Protection: Includes safety features to protect the battery from damage.
• Simplified Design: Requires minimal external components for operation.
• Compact Size: Available in small packages for space-constrained applications.
• Reliable Operation: Provides stable and reliable performance.

Additional Details:

The SMB345ET-1850Y typically requires a few external components, such as resistors and capacitors, for proper operation. The charging current can be programmed using external resistors. The datasheet provides detailed information on the recommended component values and layout guidelines. It is crucial to follow the manufacturer's recommendations to ensure safe and efficient battery charging. The IC also includes status indicators for monitoring the charging process. The operating temperature range and other electrical characteristics should be carefully considered for the specific application.