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Product Overview  


For complete documentation, see the data sheet.

Printed On: 7/11/2015

MC33033: Brushless DC Motor Controller, 3-Phase

Product Description
The MC33033 is a high performance second generation, limited feature, monolithic brushless dc motor controller which has evolved from the 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, cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode, and internal thermal shutdown.

Typical motor control functions include open loop speed, forward or reverse direction, and run enable.The MC33033 is designed to operate brushless motors with electrical sensor phasings of 60° /300° or 120° /240° , and can also efficiently control brush dc motors.
Features
 
  • 10 to 30 V Operation
  • Undervoltage Lockout
  • 6.25 V Reference Capable of Supplying Sensor Power
  • Fully Accessible Error Amplifier for Closed Loop Servo Applications
  • High Current Drivers Can Control External 3-Phase MOSFET Bridge
  • Cycle-By-Cycle Current Limiting
  • Internal Thermal Shutdown
  • Selectable 60° /300° or 120° /240° Sensor Phasings
  • Also Efficiently Control Brush DC Motors with External MOSFET H-Bridge
Applications
  • Automotive
Selected Electrical Specifications

Product Compliance Status Description Type VM Min (V) VM Max (V) VCC Min (V) VCC Max (V) IO Max (A) IO Peak Max (A) Step Resolution Control Type Feedback Method Current Sense Regulator Output Fault Detection Flyback Protection RDS(on) Typ (Ω) Package Type
 Pb-free 
 Halide free 
 Active     Brushless DC Motor Controller, 3-Phase   Brushless DC   10   40   10   30   0.1   0.1         External Resistor   Yes         SOIC-20W 
Package Availability
Type
PB free
Standard
PDIP-20 x x
SOIC-20W x x