The BD9215F is a system power supply IC manufactured by Rohm Semiconductor. It is specifically designed for LCD panels used in TVs and monitors. This IC integrates multiple power management functions to efficiently power the LCD panel and its associated components.

Applications

• LCD TVs: Power supply for LCD panels and backlight drivers.
• LCD Monitors: Power supply for LCD panels and associated circuitry.
• Industrial Displays: Power supply for LCD screens used in industrial equipment.
• Automotive Displays: Powering LCD panels in car infotainment systems.

Features

• Multiple Output Voltages: Provides various regulated output voltages required by LCD panels.
• High Efficiency: Designed for high power conversion efficiency.
• Built-in Protection Circuits: Includes over-voltage protection (OVP), over-current protection (OCP), and thermal shutdown (TSD).
• DC-DC Converters: Integrates boost converters, buck converters, and/or buck-boost converters as needed for LCD power.
• Gate Drivers: May include gate drivers for backlight LEDs.
• Dimming Control: Includes dimming control functionality for adjusting the brightness of the LCD panel.
• Compact Package: Designed for space-saving applications.

Benefits

• Simplified LCD Power Design: Reduces the number of external components required.
• High Efficiency: Minimizes power loss and reduces heat generation.
• Reliable Operation: Built-in protection circuits ensure safe and stable operation.
• Precise Voltage Regulation: Provides accurate and stable voltages for optimal LCD performance.
• Dimming Control: Allows for brightness adjustment for comfortable viewing.
• Compact Size: Enables integration into small LCD panel assemblies.

Additional Details

The BD9215F usually integrates a combination of DC-DC converters (boost, buck, and/or buck-boost) to generate the various voltages required by an LCD panel. These include the AVDD (analog voltage drain), VGH (gate high voltage), VGL (gate low voltage), and VCOM (common voltage). It often integrates protection features like over-voltage, under-voltage, over-current, and thermal shutdown. The specific output voltage levels and current capabilities depend on the specific model and application requirements. The device is typically surface-mounted. The operating temperature range is usually from -25°C to +85°C. It is an essential component for powering modern LCD panels in a variety of applications.