The BD3931FP is a system power supply IC from Rohm Semiconductor, designed for automotive applications, particularly for camera module power supplies. This IC integrates multiple functions, including linear regulators, a DC/DC converter controller, and various protection circuits, making it a comprehensive solution for powering camera modules in vehicles. It supports the increasing demands for smaller, more efficient, and safer power supplies in automotive systems.

Applications

• Automotive Camera Modules (Front, Rear, Side View Cameras)
• Advanced Driver Assistance Systems (ADAS)
• In-Vehicle Infotainment (IVI) systems
• Automotive sensor power supplies

Features

• Multiple Output Voltages: Supports various voltage rails required by camera modules and other automotive components.
• DC/DC Converter Controller: Enables efficient power conversion for different voltage levels.
• Linear Regulators (LDOs): Provides stable and clean power for sensitive circuits.
• Overvoltage Protection (OVP)
• Undervoltage Protection (UVP)
• Overcurrent Protection (OCP)
• Thermal Shutdown Protection (TSD)
• Short Circuit Protection (SCP)
• Built-in Watchdog Timer
• Compact Package

Benefits

• Integrated Solution: Reduces the number of external components and simplifies system design.
• High Efficiency: Minimizes power dissipation and improves overall system efficiency.
• Robust Protection: Ensures safe and reliable operation in harsh automotive environments.
• Compact Size: Suitable for space-constrained automotive applications.
• Meets Automotive Standards: Designed and tested to meet stringent automotive quality and reliability requirements.

Additional Details

The BD3931FP is designed to operate over a wide input voltage range, typical of automotive battery systems. The integrated DC/DC converter controller allows for efficient step-down conversion from the battery voltage to lower voltage levels required by the camera module and other components. The linear regulators provide clean and stable power for sensitive analog and digital circuits. The comprehensive protection features, including OVP, UVP, OCP, TSD, and SCP, ensure the IC and the connected components are protected from various fault conditions. The built-in watchdog timer enhances system reliability by monitoring the microcontroller's operation and triggering a reset if necessary. The compact package and minimal external component requirements contribute to a smaller and more cost-effective solution for automotive camera module power supplies.