FAN8725

www.fairchildsemi.com FAN8725 (KA3025) Spindle Motor and 5-Channel Motor Driver Features Common Built-in thermal shutdown circuit (TSD) Built-in power save circuit 3 Independent voltage source Corresponds to 3.3V or 5V DSP Description The FAN8725 is a monolithic IC suitable for a 3-phase BLDC spindle motor driver and 5-ch motor drivers which drives the focus actuator, tracking actuator, loading motor, stepping motor driver of the CD-media systems. Spindle Built-in hall bias Built-in FG signal output circuit Built-in rotational direction detecting circuit Built-in protection circuit for reverse rotation Built-in short brake circuit 48-QFPH-1414 BTL (5-channel) Built-in 5-CH balanced transformerless (BTL) driver Built-in Level shift circuit Independent voltage sources VM2 = CH1,CH2 / VM3 = CH3, CH4 ,CH5 Typical Applications Compact disk ROM (CD-ROM) Compact disk RW (CD-RW) Digital video disk ROM (DVD-ROM) Digital video disk RAM (DVD-RAM) Digital video disk Player (DVDP) Other compact disk media Ordering Information Device FAN8725 Package 48-QFPH-1414 Operating Temp. −35°C ~ +85°C Rev. 1.0.1 March. 2000. ©2000 Fairchild Semiconductor International 1 FAN8725 (KA3025) Pin Assignments PGND3 37 SVCC2 OUT5 VREF ECR VM3 PC1 48 47 46 45 44 43 42 41 40 39 38 H1+ IN5 VH EC PS SB 1 36 DO5 - H1H2+ 2 35 DO5+ DO4 - 3 34 H2- 4 32 DO4+ H3+ H3- 5 32 DO3 DO3+ 6 31 FAN8725 FG 7 30 PGND2 DIR SVCC1 8 29 DO2 D...