The LP3773 is a highly integrated power management integrated circuit (PMIC) produced by Shenzhen Xinmao Microelectronics Co., Ltd. It is designed primarily for battery charging and power supply applications, commonly found in portable devices and power banks. This versatile chip combines multiple functions into a single package, reducing the overall BOM (Bill of Materials) cost and simplifying the design process.

Applications

• Power Banks: Used as the core component for charging and discharging control in power banks.
• Portable Media Players: Powers the device and manages battery charging.
• Mobile Phones: Functions as a secondary charger or power management component.
• Bluetooth Speakers: Manages battery charging and provides power to the audio amplifier.
• Tablets: Handles battery charging and provides power to various subsystems.

Features

• Integrated Linear Charger: Includes a linear charger with adjustable charging current.
• Boost Converter: Integrates a boost converter to provide a stable output voltage, typically 5V, from a battery source.
• Input Overvoltage Protection (OVP): Protects the device from damage due to excessive input voltage.
• Output Overcurrent Protection (OCP): Limits the output current to prevent damage from short circuits or overloads.
• Battery Overcharge Protection (OVP): Prevents the battery from being overcharged, extending battery life.
• Thermal Shutdown Protection (OTP): Shuts down the device if the junction temperature exceeds a safe level.
• LED Indicators: Supports LED indicators for charging status and power level.
• Low Quiescent Current: Minimizes power consumption when the device is in standby mode.
• Compact Package: Available in a small package, suitable for space-constrained applications.

Benefits

• Simplified Design: Integrates multiple functions into a single chip, simplifying the design process and reducing BOM cost.
• Extended Battery Life: Efficient charging and low quiescent current contribute to longer battery life.
• Reliable Operation: Integrated protection features ensure reliable operation and protect the device and the battery from damage.
• Compact Size: Small package size enables integration into space-constrained applications.
• Cost-Effective: Provides a cost-effective solution for battery charging and power management.

Additional Details

The LP3773 typically uses external resistors to set the charging current and output voltage. The datasheet provides detailed information on component selection and application circuit design.

The device also features an enable pin, which allows the user to turn the device on and off. This can be used to further reduce power consumption when the device is not in use.

Shenzhen Xinmao Microelectronics Co., Ltd. provides datasheets and application notes for the LP3773, which contain detailed technical information and design guidelines.