NCV33039

MC33039, NCV33039 Closed Loop Brushless Motor Adapter The MC33039 is a high performance closed−loop speed control adapter specifically designed for use in brushless DC motor control systems. Implementation will allow precise speed regulation without the need for a magnetic or optical tachometer. This device contains three input buffers each with hysteresis for noise immunity, three digital edge detectors, a programmable monostable, and an internal shunt regulator. Also included is an inverter output for use in systems that require conversion of sensor phasing. Although this device is primarily intended for use with the MC33035 brushless motor controller, it can be used cost effectively in many other closed−loop speed control applications. Features Digital Detection of Each Input Transition for Improved Low Speed Motor Operation TTL Compatible Inputs With Hysteresis Operation Down to 5.5 V for Direct Powering from MC33035 Reference Internal Shunt Regulator Allows Operation from a Non−Regulated Voltage Source Inverter Output for Easy Conversion between 60°/300° and 120°/240° Sensor Phasing Conventions Pb−Free Packages are Available http://onsemi.com MARKING DIAGRAMS PDIP−8 MC33039P P SUFFIX AWL CASE 626 YYWWG 11 SOIC−8 33039 D SUFFIX ALYW CASE 751 G 11 A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week G or G = Pb−Free Package PIN CONNECTIONS φA 4 3 φA + 20 k To Rotor Position Sensors 2 φB 1 φC Delay Delay Delay VCC 8 +...