Overview
The MC33033DWG is a high-performance, second-generation, monolithic brushless DC motor controller developed by Onsemi. It is designed to operate brushless motors with electrical sensor phasings of 60°/300° or 120°/240° and can also efficiently control brush DC motors. This device has evolved from the full-featured MC33034 and MC33035 controllers, incorporating all the active functions necessary for open-loop, three or four-phase motor control. It includes a rotor position decoder, temperature-compensated reference, frequency-programmable sawtooth oscillator, fully accessible error amplifier, pulse width modulator comparator, and high current totem pole drivers for controlling external 3-phase MOSFET bridges.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Voltage (VCC) | 10 to 30 | V |
| Operating Junction Temperature (TJ) | -40 to +85 (MC33033), -40 to +125 (NCV33033) | °C |
| Storage Temperature Range (Tstg) | -65 to +150 | °C |
| Top Drive Voltage (VCE(top)) | 40 | V |
| Top Drive Sink Current (ISink(top)) | 50 | mA |
| Bottom Drive Output Current (IDRV) | 100 | mA |
| Oscillator Frequency (fOSC) | 22 to 28 | kHz |
| Input Threshold Voltage (VIH/VIL) | 3.0/2.2 (High), 1.7/0.8 (Low) | V |
| Current Sense Input Voltage Range (VSense) | -0.3 to 5.0 | V |
| Internal Thermal Shutdown | Yes |
Key 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 to control external 3-phase MOSFET bridge
- Cycle-by-cycle current limiting with selectable time delayed latched shutdown mode
- Internal thermal shutdown
- Selectable 60°/300° or 120°/240° sensor phasings
- Efficient control of brush DC motors with external MOSFET H-bridge
Applications
The MC33033DWG is particularly suited for automotive and industrial applications where robust and reliable motor control is essential. It can be used in various systems that require efficient control of brushless DC motors, including but not limited to:
- Automotive systems (e.g., fuel pumps, cooling fans)
- Industrial automation (e.g., motor drives, servo systems)
- Consumer electronics (e.g., high-performance fans, pumps)
Q & A
- What is the operating voltage range of the MC33033DWG?
The MC33033DWG operates within a voltage range of 10 to 30 V. - What types of motor can the MC33033DWG control?
The MC33033DWG can control brushless DC motors with electrical sensor phasings of 60°/300° or 120°/240° and also efficiently control brush DC motors. - What protective features does the MC33033DWG include?
The MC33033DWG includes undervoltage lockout, cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode, and internal thermal shutdown. - Can the MC33033DWG be used in closed-loop servo applications?
Yes, the MC33033DWG features a fully accessible error amplifier suitable for closed-loop servo applications. - What is the maximum current output of the bottom drivers?
The bottom drivers can output up to 100 mA. - What is the oscillator frequency range of the MC33033DWG?
The oscillator frequency range is from 22 kHz to 28 kHz. - Is the MC33033DWG suitable for automotive applications?
Yes, the MC33033DWG, especially the NCV33033 variant, is designed for automotive and other applications requiring site and change control. - What is the maximum junction temperature for the MC33033DWG?
The maximum junction temperature is 150°C. - Does the MC33033DWG have thermal shutdown protection?
Yes, it includes internal thermal shutdown protection. - How many terminals does the MC33033DWG have?
The MC33033DWG has 20 terminals.
