STC4054GR

The part number STC4054GR corresponds to a linear lithium-ion battery charger IC (Integrated Circuit) manufactured by STMicroelectronics. Linear battery chargers are commonly used in portable electronic devices, such as smartphones, tablets, and wearables, to charge lithium-ion or lithium-polymer batteries safely and efficiently.

Key Features:

• Single-Cell Lithium-Ion Battery Charger: The STC4054GR is designed to charge single-cell lithium-ion (Li-ion) batteries, which are widely used in portable electronic devices due to their high energy density and rechargeable properties.

• Linear Charging Architecture: The IC employs a linear charging architecture, where the charging current is controlled by regulating the voltage across the battery. This approach offers simplicity and low cost but may result in lower charging efficiency compared to switching chargers.

• Programmable Charging Current: The charging current can typically be programmed externally using external resistors, allowing flexibility in charging current selection to accommodate different battery capacities and charging requirements.

• Thermal Regulation and Protection: The charger IC may include thermal regulation and protection features to prevent overheating during charging, ensuring safe operation and battery longevity.

• Battery Voltage Monitoring: The IC monitors the battery voltage during charging to prevent overcharging, which can degrade battery life and pose safety risks.

• Charge Status Indicator: Some charger ICs include charge status indicators, such as LED outputs or digital signals, to indicate the charging status to the user or host system.

• Input Voltage Range: The IC may support a wide input voltage range, allowing it to be powered from various power sources such as USB ports, AC adapters, or external power supplies.

• Low Dropout Voltage: The charger IC typically features low dropout voltage, enabling efficient operation even when the input voltage is close to the battery voltage.

• Small Package: The "GR" suffix in the part number indicates that the IC is provided in a small footprint package, such as a QFN (Quad Flat No-Lead) package, for space-constrained applications and easy integration onto printed circuit boards (PCBs).

Applications:

• Portable Electronic Devices: Used in smartphones, tablets, digital cameras, portable media players, and other battery-powered devices.
• Wearable Devices: Deployed in smartwatches, fitness trackers, and other wearable electronics requiring compact and efficient battery charging solutions.
• IoT (Internet of Things) Devices: Integrated into IoT sensors, modules, and connected devices for battery charging and power management.
• Consumer Electronics: Found in various consumer electronics products for charging rechargeable lithium-ion batteries.
• Medical Devices: Utilized in portable medical devices, monitoring equipment, and diagnostic devices for battery charging and power management.