Overview
The MC33035DWR2, produced by onsemi, is a high-performance, second-generation monolithic brushless DC motor controller. This device is designed to implement a full-featured, open-loop, three or four-phase motor control system. It includes all the active functions necessary for motor control, such as a rotor position decoder, a temperature-compensated reference, a frequency-programmable sawtooth oscillator, and high-current drivers for power MOSFETs. The MC33035DWR2 is also capable of efficiently controlling brush DC motors with an external MOSFET H-bridge.
The controller is constructed using bipolar analog technology, offering robust performance and ruggedness in hostile industrial environments. It supports various motor control functions, including open-loop speed control, forward or reverse rotation, run enable, and dynamic braking.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage | 10 | - | 30 | V |
| Reference Output Voltage | 5.9 | 6.25 | 6.57 | V |
| Bottom Drive Output Current (Source or Sink) | - | - | 100 | mA |
| Top Drive Output Sink Saturation | - | - | 1.5 | V |
| Operating Junction Temperature | - | - | 150 | °C |
| Operating Ambient Temperature Range | -40 | - | 85 | °C (MC33035), -40 to +125°C (NCV33035) |
| Storage Temperature Range | -65 | - | 150 | °C |
Key Features
- Operates with electrical sensor phasings of 60°/300° or 120°/240°
- Undervoltage lockout and internal thermal shutdown
- Cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode
- High current totem pole bottom drivers and open collector top drivers for driving power MOSFETs
- Fully accessible error amplifier for closed-loop servo applications
- Frequency-programmable sawtooth oscillator
- Unique fault output for interfacing with microprocessor-controlled systems
- Supports open-loop speed control, forward or reverse rotation, run enable, and dynamic braking
- AEC-Q100 qualified and PPAP capable for automotive and other demanding applications
- Pb-free packages available
Applications
The MC33035DWR2 is suitable for a variety of applications, including:
- Brushless DC motor control in industrial, automotive, and consumer electronics
- Control of three-phase motors with different sensor phasings
- Efficient control of brush DC motors using an external MOSFET H-bridge
- Closed-loop servo applications utilizing the fully accessible error amplifier
- Systems requiring robust motor control functions such as open-loop speed control, direction change, and dynamic braking
Q & A
- What is the operating voltage range of the MC33035DWR2?
The MC33035DWR2 operates within a voltage range of 10 to 30 volts.
- What types of sensor phasings does the MC33035DWR2 support?
The device supports electrical sensor phasings of 60°/300° or 120°/240°.
- What are the key protective features of the MC33035DWR2?
The key protective features include undervoltage lockout, cycle-by-cycle current limiting, internal thermal shutdown, and a unique fault output.
- Can the MC33035DWR2 control brush DC motors?
- What is the purpose of the rotor position decoder in the MC33035DWR2?
The rotor position decoder monitors the three sensor inputs to provide the proper sequencing of the top and bottom drive outputs.
- How does the Forward/Reverse input affect motor rotation?
The Forward/Reverse input changes the direction of motor rotation by reversing the voltage across the stator winding.
- What is the role of the Output Enable input?
A logic high at the Output Enable input causes the motor to run, while a low causes it to coast.
- Is the MC33035DWR2 suitable for automotive applications?
- What is the operating junction temperature of the MC33035DWR2?
The operating junction temperature is up to 150°C.
- Are Pb-free packages available for the MC33035DWR2?
