LB1822

The LB1822 is a monolithic predriver IC for controlling three-phase brushless motors and has an on-chip digital speed control circuit. The LB1822 is ideally suited for driving the motor of laser beam printers, facsimiles, plain paper copiers, and so on.

The features of LB1822 can be summarized as (1)30V withstand voltage and 30mA output current ; (2)current limiter ; (3)low-voltage protection circuit ; (4)thermal shutdown circuit ; (5)hall amp with hysteresis characteristic ; (6)start/stop terminals ; (7)crystal oscillator and divider ; (8)digital speed control circuit ; (9)lock detector.

The absolute maximum ratings and allowable operating conditions of LB1822 are (1)maximum supply voltage 1: VCC 30V ; (2)maximum supply voltage 2: VM 30V ; (3)output current lO: 30 mA ; (4)allowable power dissipation 1: Pd maxt  IC alone: 3W; (5)allowable power dissipation 2: Pd max2 With intinte heat sink: 20W; (6)operating temperature Top: -20 to +80°C; (7)storage temperature tstg: -55 to +150°C ; (8)supply voltage 1 VCC: 9.5 to 28V ; (9)supply voltage 2 VM: 5 to 28V; (10)voltage regulator output current IVH: 0 to 20 mA ; (11)comparator output current lOSC: 0 to 30 mA ; (12)lock detector output current ILD: 0 to 20 mA.