LV88552

LV88551, LV88552, LV88553, LV88554 Motor Driver, Single-Phase, PWM, Full-Wave, BLDC Motor Overview The LV88551JA/R, LV88552JA/R, LV88553JA/R and LV88554JA/R are the pre−driver for a single−phase BLDC motor, which have the closed loop controller for motor rotation speed. These are available to control a motor with low vibration and the low noise. In addition, lead−angle adjustment is possible by external pins. Lead−angle value and lead−angle slant can be adjusted independently. Thus, the device can be driven by high efficiency and low noise with various motors. Motor speed setting curve is adjustable with using external resistor only. As a method of the rotary speed control of the motor, direct−PWM pulse input. Features Single−phase Full Wave Drive Pre−driver Include Closed Loop Speed Control Speed Control Function by PWM Duty Input (25 Hz to 100 kHz) Soft Start−up Function and PWM Soft Switching Phase Transition Soft PWM Duty Cycle Transitions Built−in Current Limit Circuit and Thermal Protection Circuit Built−in Locked Rotor Protection and Auto Recovery Circuit Dynamic Lead Angle Adjustment with Respect to Rotational Speed Lead−angle Control Parameters can be Configured Lineup of Different Closed Loop Gain Selection Lineup of Rotation Signal Output Selection These are Pb−Free and Halogen−Free Devices Typical Applications PC & Computing Equipment Refrigerator Games LV88551, 552, 553, 554 COMPARISON TABLE Loop Gain Rotation Signal LV88551JA/R ...