LB11852RV

Ordering number : ENA2133 LB11852RV Monolithic Digital IC For Fan Motor Single-phase Full-wave Pre-driver with Speed Control Function http://onsemi.com Overview The LB11852RV is a single-phase bipolar driving motor pre-driver with a speed control function based on speed feedback. With a small number of external parts, a highly efficient and very quiet variable-speed drive fan motor with low power consumption and high rotational accuracy can be implemented. The LB11852RV, integrated in a miniature package, is best suited for driving small fan motors requiring speed control. Features Single-phase full-wave driving pre-driver ⇒ With a PMOS-NMOS device used as the external power transistor, low saturation output and a single-phase full-wave drive enable a high-efficiency drive with low power consumption. Speed control circuit incorporated ⇒ Compared with open-loop control, a closed-loop control function that uses speed feedback to control the speed makes it possible to improve the rotational speed accuracy and reduce the variations in the rotational speed caused by fluctuations in the supply voltage or load. The separately excited upper direct PWM method is featured as the variable speed system. Variable speed control is possible with external PWM input or analog voltage input ⇒ The speed control input signal is compatible with PWM duty ratio and analog voltages. Soft start circuit incorporated Minimum speed setting pin ⇒ The minimum speed can be set using an externa...