MC33033DWG

Overview

The MC33033DWG is a high-performance, second-generation monolithic brushless DC motor controller designed for three or four phase open-loop applications. It operates within a 10V to 30V supply range and features an integrated rotor position decoder for commutation sequencing. The device includes a temperature-compensated reference capable of supplying sensor power, a frequency-programmable sawtooth oscillator, and a fully accessible error amplifier. It provides high-current top and bottom drivers suitable for external MOSFETs, along with cycle-by-cycle current limiting and internal thermal shutdown protection.

Feature Summary

• Integrated rotor position decoder for proper commutation sequencing in open-loop control
• High-current totem pole bottom drivers and open collector top drivers for external MOSFET bridge control
• Frequency-programmable sawtooth oscillator and selectable sensor phasing options
• Built-in protection mechanisms including undervoltage lockout, cycle-by-cycle current limiting, and internal thermal shutdown

Applications

• Open-loop speed control for three-phase brushless DC motors
• Four-phase brushless DC motor control systems
• Brush DC motor control using external MOSFET H-bridge configurations
• Closed-loop servo applications utilizing the accessible error amplifier

Procurement Notes

Verify that the specific part number suffix matches the required package type and lead-free status. Confirm AEC-Q100 qualification requirements if automotive application is intended. Check datasheet revisions for any updates to driver specifications or operating voltage ranges before finalizing procurement orders.

Selection Notes

Select this component when open-loop control is sufficient for the application. It serves as a limited-feature evolution from the MC33034 and MC33035 controllers. Choose this model over full-featured variants if brake inputs or fault output signals are not required by the system design.

Part Context

The MC33033 series represents a simplified iteration of onsemi's brushless DC motor controller family. It retains core active functions like the position decoder and error amplifier while removing complex features such as separate drive circuit supplies and dedicated fault outputs found in predecessor models.

Replacement Considerations

MC33033DW