LB1810M

The LB1810M is a three-phase, full-wave spindle motor driver IC that features digital speed control, making it ideal for use in 3.5-inch floppy-disk drives. It can be used in most disk drives without output electrolytic capacitors. The LB1810M incorporates both active-HIGH and active-LOW STBJTJSIOP control inputs, a revolution detector, Hall-effect transducer amplifiers with AGC, thermal protection and index delay circuits, and a single-sided hysteresis index comparator. The LBISIOM operates from either a 4.2 to 6.5 or 10.2 to 13.8 supply and is available in 44-pin QIPs.

The features of LB1810M can be summarized as (1)three-phase, full-wave motor driver; (2)digital speed control; (3)both active-HIGH and active-LOW startlstop control inputs; (4)revolution detector; (5)hall-effect transducer amplitiers with AGC; (6)themial protection circuit; (7)single-sided hysteresis index comparator; (8)index delay circuit; (9)4.2 to 6.5 Vor 10.2 to 13.8 Vsupply; (10)44-pin QIP.

The absolute maximum ratings of LB1810M are (1)supply voltage VCC:14.5V; (2)output current ID: 1(t0.5s)/0.7A; (3)power dissipation PD: 1000mW; (4)operating temperature range Topr: -20 to 80 °C; (5)storage temperature range Tstg: -40 to 125°C.