The BD9862MUV-E2 is a specialized Power Management Integrated Circuit (PMIC) from Rohm Semiconductor. This PMIC is designed for LCD backlight applications, providing highly efficient and reliable power management for driving LED backlights in LCD panels. It integrates multiple functions to simplify the design and reduce the component count in LCD display systems.

Applications:

• LCD TVs: Powers the LED backlight for efficient and consistent display brightness.
• Notebook PCs: Manages power delivery to the LCD panel backlight for optimal battery life.
• Monitors: Provides stable and controlled power to the backlight LEDs.
• Automotive displays: Drives LCD backlights in car navigation and infotainment systems.
• Industrial displays: Powers backlights in LCD panels used in industrial equipment and machinery.

Features:

• High efficiency DC-DC converter: Maximizes power conversion efficiency, reducing heat dissipation.
• Built-in PWM dimming control: Allows for precise adjustment of backlight brightness.
• Overvoltage protection (OVP): Protects the LED backlight from damage due to overvoltage conditions.
• Overcurrent protection (OCP): Prevents excessive current flow to the LEDs, ensuring safe operation.
• Short-circuit protection (SCP): Protects the PMIC and backlight in case of a short circuit.
• Under voltage lockout (UVLO): Prevents operation under insufficient voltage conditions.

Benefits:

• High efficiency: Reduces power consumption and extends battery life in portable devices.
• Precise brightness control: Allows for optimal viewing experience in various ambient lighting conditions.
• Comprehensive protection: Ensures reliable and safe operation of the LED backlight.
• Simplified design: Integrated functions reduce component count and board space.
• Compact package: Facilitates integration into small and space-constrained applications.

Additional Details:

The BD9862MUV-E2 typically operates with an input voltage range of 7V to 26V. The PWM dimming frequency can be adjusted to optimize display performance and minimize audible noise. It provides a constant current output to drive the LED backlight string, ensuring uniform brightness across the display. The device is available in a VQFN package. Furthermore, it includes a soft-start function to minimize inrush current during startup. Detailed application notes and reference designs are available from Rohm Semiconductor.