The BU64245GWZ-TR is a key illumination LED driver manufactured by Rohm Semiconductor. It's designed to drive LEDs used for illuminating keys in various electronic devices, providing consistent brightness and efficient power management. The IC optimizes LED current to extend battery life in portable applications and enhance user experience with uniform illumination.

Applications

• Automotive navigation systems
• Car audio systems
• Remote controls
• Keypads in industrial equipment
• Consumer electronics with backlit buttons or keys

Features

• Constant current LED driver
• High efficiency DC-DC converter
• Built-in protection circuits (overvoltage, overcurrent, over-temperature)
• Compact package (WLCSP)
• PWM dimming control

Benefits

• Provides uniform brightness for key illumination
• Extends battery life in portable devices due to high efficiency
• Protects the LEDs and the driver IC from damage
• Reduces board space requirements with its small footprint
• Enables flexible brightness control through PWM dimming

Additional Details

The BU64245GWZ-TR utilizes a high-efficiency DC-DC converter to regulate the current supplied to the LEDs. The built-in protection circuits safeguard against potential damage from overvoltage, overcurrent, and over-temperature conditions. The device's compact WLCSP (Wafer Level Chip Scale Package) allows for integration into space-constrained applications. The PWM dimming control feature allows users to adjust the brightness of the LEDs to suit their preferences or ambient lighting conditions.