Overview
The MC33035DWG is a high-performance, second-generation monolithic brushless DC motor controller produced by onsemi. This device is designed to implement a full-featured open-loop, three or four phase motor control system. It includes a rotor position decoder for proper commutation sequencing, a temperature-compensated reference capable of supplying sensor power, a frequency-programmable sawtooth oscillator, three open collector top drivers, and three high current totem pole bottom drivers. These drivers are ideally suited for driving power MOSFETs. The MC33035DWG also features protective functions such as undervoltage lockout, cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode, internal thermal shutdown, and a unique fault output that can be interfaced into microprocessor-controlled systems.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range (VCC) | 10 | - | 30 | V |
| Reference Output Voltage (Vref) | 5.9 | 6.25 | 6.57 | V |
| Bottom Drive Output Current (Source or Sink) | - | - | 100 | mA |
| Top Drive Output Off-State Leakage (VCE = 30 V) | - | - | 0.1 | μA |
| Bottom Drive Output Switching Time (CL = 1000 pF) | - | - | 200 | ns |
| Operating Junction Temperature (TJ) | - | - | 150 | °C |
| Operating Ambient Temperature Range | -40 | - | 85 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
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 can control external 3-phase MOSFET bridge
- Cycle-by-cycle current limiting
- Pinned-out current sense reference
- Internal thermal shutdown
- Selectable 60°/300° or 120°/240° sensor phasings
- Can efficiently control brush DC motors with external MOSFET H-bridge
- AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements
Applications
The MC33035DWG is suitable for a variety of motor control applications, including:
- Brushless DC (BLDC) motors
- Brush DC motors with external MOSFET H-bridge
- Automotive systems requiring AEC-Q100 qualification and PPAP capability
- Industrial automation and control systems
- Robotics and mechatronics
- Medical devices and equipment
Q & A
- What is the operating voltage range of the MC33035DWG?
The MC33035DWG operates within a voltage range of 10 to 30 V.
- What types of motor can the MC33035DWG control?
The MC33035DWG can control both brushless DC (BLDC) motors and brush DC motors with an external MOSFET H-bridge.
- What protective features does the MC33035DWG include?
The device includes undervoltage lockout, cycle-by-cycle current limiting, internal thermal shutdown, and a unique fault output.
- What is the purpose of the 60°/120° select pin?
The 60°/120° select pin configures the control circuit operation for either 60° or 120° sensor electrical phasing inputs.
- Can the MC33035DWG be used in automotive applications?
Yes, the MC33035DWG is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other applications requiring unique site and control change requirements.
- What is the maximum operating junction temperature of the MC33035DWG?
The maximum operating junction temperature is 150°C.
- How does the device handle thermal issues?
The device includes internal thermal shutdown to protect against overheating.
- What is the function of the error amplifier in the MC33035DWG?
The error amplifier is fully accessible and can be used for closed loop servo applications.
- Can the MC33035DWG be controlled by a microprocessor?
Yes, the device includes a unique fault output that can be interfaced into microprocessor-controlled systems.
- What is the storage temperature range for the MC33035DWG?
The storage temperature range is from -65°C to 150°C.
