LA6503

Ordering number : EN5791 Monolithic Linear IC LA6503 CD-ROM Drive Spindle Motor Driver + Sled Motor Driver + Sled Motion/Position Detector IC Overview The LA6503 was developed for CAV control CD-ROM drives, and provides spindle motor driver, sled motor driver, and sled motion/position detection circuits. Package Dimensions unit: mm 3219-QFP34H-C [LA6503] Functions and Features CAV control spindle motor driver — Three-phase brushless motor driver — IOmax = 1 A — Built-in FG output circuit (single Hall detection output) — Reverse braking circuit — Built-in start/stop circuit — Upper side current detection for minimal loss in the current detection resistor. Also, the voltage drop in this resistor reduces the IC internal power dissipation. — Built-in thermal shutdown circuit Sled motor driver — One built-in BTL driver channel — IOmax = 1 A — Wide dynamic range — Built-in level shifting circuit — Muting (output on/off) circuit — Built-in thermal shutdown circuit Sled motion/position detection circuit — Circuit that provides a pulse output corresponding to sled motion and position — This circuit emits 96 pulses for each rotation from a 24-pole magnet and 90° phase difference Hall element motors, and thus detects the distance moved. It also provides two 48-pulse outputs with differing phases such that the motion direction can be detected from the phase difference between those signals. Hall bias power supply — Generates the Hall element 3-V bias voltage. — IOmax = 30 mA...