MC33033DWR2G

Overview

The MC33033DWR2G is a monolithic brushless DC motor controller from ON Semiconductor, designed for open-loop three or four-phase motor control. It integrates a rotor position decoder, temperature-compensated reference, frequency-programmable sawtooth oscillator, error amplifier, PWM comparator, and driver stages. The device operates within a supply voltage range of 10 V to 30 V and includes undervoltage lockout, cycle-by-cycle current limiting, and internal thermal shutdown. It features selectable sensor phasings and high-current drivers suitable for external MOSFET bridges.

Feature Summary

• Integrates active functions for open-loop commutation sequencing including a rotor position decoder and frequency-programmable sawtooth oscillator.
• Provides fully accessible error amplifier support for closed-loop servo applications alongside high-current top and bottom drivers.
• Includes comprehensive protection mechanisms such as undervoltage lockout, cycle-by-cycle current limiting, and internal thermal shutdown.

Applications

• Open-loop control of three-phase brushless DC motors
• Control of four-phase brushless DC motors
• Brushed DC motor control using external MOSFET H-bridge configurations

Procurement Notes

Verify the specific ordering suffix to confirm package type and reel quantity specifications. Ensure compatibility with required automotive qualification standards if applicable. Confirm lead times and availability through authorized distribution channels prior to finalizing procurement plans.

Selection Notes

Select this component for applications requiring integrated open-loop BLDC control without separate drive supply pins. Consider alternatives like the MC33034 or MC33035 if brake inputs, fault outputs, or additional features are necessary. Verify that the selectable sensor phasing options align with the specific motor encoder requirements.

Part Context

This part belongs to the second-generation family of monolithic brushless DC motor controllers from ON Semiconductor. It evolved from the full-featured MC33034 and MC33035 models but offers a limited feature set optimized for cost-sensitive open-loop implementations. It shares core architecture with the MC33033DW variant.

Replacement Considerations

The MC33033DW serves as a direct pin-compatible alternative in a tube package. For applications requiring additional features such as brake inputs or fault signals, the MC33034 or MC33035 are recommended replacements.