The MC33033 is a high performance second generation, limited feature, monolithic brushless dc motor controller which has evolved from Motorola′s full featured MC33034 and MC33035 controllers. It contains all of the active functions required for the implementation of open loop, three or four phase motor control. The device consists of a rotor position decoder for proper commutation sequencing, temperature compensated reference capable of supplying sensor power, frequency programmable sawtooth oscillator, fully accessible error amplifier, pulse width modulator comparator, three open collector top drivers, and three high current totem pole bottom drivers ideally suited for driving power MOSFETs. Unlike its predessors, it does not feature separate drive circuit supply and ground pins, brake input, or fault output signal. Included in the MC33033 are protective features consisting of undervoltage lockout, overtemperature protection, and thermal shutdown.
The MC33033 is a high-performance, second-generation monolithic brushless DC motor controller designed for open-loop, three or four-phase motor control. It evolved from the MC33034 and MC33035 controllers but differs by lacking separate drive circuit supply and ground pins, a brake input, or a fault output signal. The device integrates a rotor position decoder, temperature-compensated reference, frequency programmable sawtooth oscillator, error amplifier, pulse width modulator comparator, and top and bottom drivers suitable for driving power MOSFETs.
| Operating Supply Voltage | 10 to 30 V |
|---|---|
| Operating Junction Temperature | -40° to +85°C |
| Top Drive Output Sink Current | 50 mA |
| Bottom Drive Output Current | 100 mA |
| Maximum Power Dissipation (P Suffix) | 867 mW |
| Maximum Power Dissipation (DW Suffix) | 619 mW |
The device is designed to operate brushless motors with electrical sensor phasings of 60°/300° or 120°/240°.
Yes, it can efficiently control brush DC motors when used with an external MOSFET H-Bridge.
The controller includes undervoltage lockout, cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode, and internal thermal shutdown.