BD7755RFV-E2

The BD7755RFV-E2 from ROHM Semiconductor is a specialized motor driver IC developed for the spindle motor, actuator coil, tilt coil, stepping motor, SA stepping motor, and loading motor drive in desktop Blu-ray drives and recorders.

This IC features a sensorless drive system for the spindle motor, eliminating the need for hall sensors and simplifying wiring. It incorporates a low rotation mode for stable low-speed operation and high-speed start capabilities. The spindle, stepping, and SA stepping motors are driven by power MOSFETs with PWM control for high efficiency, while the actuator, tilt, and loading drivers utilize a linear BTL drive system to minimize noise.

The BD7755RFV-E2 is housed in an HTSSOP package, which improves heat radiation efficiency. It operates with various power supply voltages, including up to 15V for POWER MOS and Preblock/BTL power blocks, and 7V for POWER MOS and PWM control blocks. The device includes built-in thermal-shut down protection.

Key features include selectable ON/OFF and brake modes via two control terminals, and an internal detection circuit for stepping and SA stepping motor output current, removing the need for external detection resistors. This makes it suitable for compact and efficient drive systems.