LB1847

Ordering number : EN5982 LB1847 Monolithic Digital IC LB1847 PWM Current Control Type Stepping Motor Driver Overview The LB1847 is a driver IC for stepping motors with PWM current control bipolar drive (fixed OFF time). A special feature of this IC is that VREF voltage is constant while the current can be set in 15 steps, allowing drive of motors ranging from 12 phase exciter types to 4W 1-2 phase exciter types. The current decay pattern can also be selected (SLOW DECAY, FAST DECAY, MIX DECAY) to increase the decay of regenerative current at chopping OFF, thereby improving response characteristics. This is especially useful for carriage and paper feed stepping motors in printers and similar applications where highprecision control and low vibrations are required. Package Dimensions unit: mm 3147B-DIP28H [LB1847] 28 15 R1.7 12.7 11.2 8.4 1 20.0 27.0 14 1.93 1.78 0.6 1.0 4.0 4.0 SANYO : DIP28H Features PWM current control (fixed OFF time) Load current digital selector (1-2, W1-2, 2W1-2, 4W1-2 phase exciter drive possible) Selectable current decay pattern (SLOW DECAY, FAST DECAY, MIX DECAY) Simultaneous ON prevention function (feedthrough current prevention) Noise canceler Built-in thermal shutdown circuit Built-in logic low-voltage OFF circuit Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's ...