The RT9541OCE is a highly integrated battery charger IC manufactured by Richtek USA Inc. It is designed for charging single-cell Li-Ion or Li-Polymer batteries in portable devices. This charger IC includes features such as constant current (CC) and constant voltage (CV) charging, thermal protection, and overvoltage protection to ensure safe and efficient battery charging.

Applications:

• Smartphones: Used for charging Li-Ion or Li-Polymer batteries in smartphones.
• Tablets: Employed in tablets for battery charging.
• Portable Media Players: Found in MP3 players and other portable media devices.
• Power Banks: Used in power banks to charge external batteries.
• Wearable Devices: Employed in smartwatches and fitness trackers for charging.

Features:

• Constant Current (CC) Charging: Provides a constant charging current until the battery voltage reaches the target voltage.
• Constant Voltage (CV) Charging: Maintains a constant voltage across the battery as it approaches full charge.
• Thermal Protection: Protects the IC from overheating by reducing the charging current when the temperature exceeds a limit.
• Overvoltage Protection (OVP): Prevents overcharging by shutting down the charging process when the battery voltage exceeds a safe level.
• Short-Circuit Protection (SCP): Protects against short circuits by shutting down the charging output.
• Low Dropout (LDO) Regulator: Provides a stable output voltage even when the input voltage is close to the output voltage.

Benefits:

• Efficient Charging: Provides fast and efficient battery charging.
• Safe Charging: Protects the battery and the device from damage during charging.
• Extended Battery Life: Optimizes the charging process to maximize battery lifespan.
• Reduced Heat Dissipation: Minimizes heat generation during charging.
• Compact Solution: Integrates multiple charging functions into a single IC.

Technical Specifications:

The RT9541OCE is specified by its input voltage range, charging current, charging voltage, and thermal protection threshold. The input voltage range indicates the range of input voltages that the IC can accept. The charging current specifies the maximum charging current that the IC can provide. The charging voltage defines the target voltage for the battery. The thermal protection threshold specifies the temperature at which the IC reduces the charging current. The device is packaged in a small surface-mount package and is designed to operate over a specified temperature range. It also meets RoHS compliance for environmental protection. It typically supports USB charging standards and can be configured with external resistors for adjusting charging parameters.