MC33035P

Overview

The MC33035P is a monolithic brushless DC motor controller designed for open-loop three or four-phase systems. It integrates a rotor position decoder, temperature-compensated reference, programmable sawtooth oscillator, and driver stages. The device operates on a 10 V to 30 V supply with undervoltage lockout. It features high-current totem pole bottom drivers and open collector top drivers for MOSFET control. Key protections include cycle-by-cycle current limiting and internal thermal shutdown. Selectable sensor phasings support 60°/300° or 120°/240° configurations.

Feature Summary

• Integrates rotor position decoding for proper commutation sequencing in open-loop applications
• Provides selectable sensor phasing options of 60°/300° or 120°/240°
• Includes internal thermal shutdown and cycle-by-cycle current limiting for protection
• Features a fully accessible error amplifier suitable for closed-loop servo implementations

Applications

• Open-loop brushless DC motor control systems
• Three-phase motor drive applications
• Four-phase motor drive applications
• Closed-loop servo systems using external error amplification

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and environmental compliance. Ensure the selected variant matches the required operating temperature range and pin configuration for the target design. Cross-reference the manufacturer's latest datasheet revision to confirm active status and any potential site or control changes associated with the part number.

Selection Notes

Select this component for designs requiring an integrated solution for BLDC motor commutation without external microcontrollers. Consider the available sensor phasing options to match the encoder or Hall effect sensors used in the application. Evaluate the thermal performance requirements given the internal shutdown feature and ensure the power stage MOSFETs are compatible with the driver output capabilities.

Part Context

The MC33035P belongs to the second-generation family of monolithic brushless DC motor controllers from onsemi. This series consolidates essential functions such as oscillators, references, and drivers into a single chip. The P suffix typically denotes a plastic DIP package variant within the broader MC33035 product line, distinguishing it from surface-mount alternatives like the DWR or DW packages.

Replacement Considerations

MC33035DWG

FAQ

What sensor phasing options does the MC33035P support?

The device supports selectable sensor phasings of either 60°/300° or 120°/240°.

Can the MC33035P be used for closed-loop applications?

Yes, it includes a fully accessible error amplifier that allows for implementation in closed-loop servo applications.