TDF5242T

INTEGRATED CIRCUITS DATA SHEET TDF5242T Brushless DC motor drive circuit Preliminary specification Supersedes data of 1997 Apr 23 File under Integrated Circuits, IC11 1997 Sep 12 Philips Semiconductors Preliminary specification Brushless DC motor drive circuit FEATURES Full-wave commutation without position sensors Built-in start-up circuitry Six outputs that can drive three external transistor pairs: – output current 0.2 A (typ.) – low saturation voltage – built-in current limiter Thermal protection Tacho output without extra sensor Transconductance amplifier for an external control transistor Brake control input Direction control input. GENERAL DESCRIPTION APPLICATIONS TDF5242T High-power applications, for instance: – high-end hard disk drives – automotive applications. The TDF5242T is a bipolar integrated circuit for driving 3-phase brushless DC motors in full-wave mode. The device functions sensorless, thus saving 3 hall-effect sensors, using the back-EMF (Electro Motive Force) sensing technique to sense the rotor position. It includes 6 pre-drivers able to control external FETs (Field Effect Transistors) or bipolar transistors. It offers brake and direction control. It is ideally suited for high-power applications such as high-end hard disk drives and automotive applications. QUICK REFERENCE DATA Measured over full voltage and temperature range. SYMBOL VP VVMOT VO ILIM Note 1. An unstabilized supply can be used. ORDERING INFORMATION TYPE NUMBER T...