Overview
The MC33035DW, 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 is constructed using bipolar analog technology, offering a high degree of performance and ruggedness in hostile industrial environments. The MC33035DW can efficiently control both brushless DC motors and brush DC motors with the use of an external MOSFET H-bridge.
Key Specifications
| Characteristic | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range (VCC) | 10 | - | 30 | V |
| Operating Voltage Range (VC) | 10 | - | 30 | V |
| Reference Output Voltage | 5.9 | 6.25 | 6.57 | V |
| Bottom Drive Output Current (Source or Sink) | - | - | 100 | mA |
| Operating Junction Temperature | - | - | 150 | °C |
| Operating Ambient Temperature Range (MC33035) | -40 | - | 85 | °C |
| Operating Ambient Temperature Range (NCV33035) | -40 | - | 125 | °C |
| Storage Temperature Range | -65 | - | 150 | °C |
Key Features
- Undervoltage lockout and internal thermal shutdown for protection.
- Cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode.
- Temperature compensated reference capable of supplying sensor power.
- Frequency programmable sawtooth oscillator.
- Fully accessible error amplifier for closed-loop servo applications.
- High current totem pole bottom drive outputs and open collector top drive outputs for driving power MOSFETs.
- Selectable 60°/300° or 120°/240° sensor phasings.
- Can efficiently control brush DC motors with an external MOSFET H-bridge.
- NCV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 qualified and PPAP capable.
- Pb-free packages available.
Applications
The MC33035DW is suitable for a variety of applications, including:
- Brushless DC motor control in industrial, automotive, and consumer electronics.
- Control of brush DC motors using an external MOSFET H-bridge.
- Open-loop speed control, forward or reverse rotation, run enable, and dynamic braking.
- Closed-loop servo applications utilizing the fully accessible error amplifier.
- Systems requiring high reliability and ruggedness, such as in hostile industrial environments.
Q & A
- What is the operating voltage range of the MC33035DW?
The operating voltage range for both VCC and VC is 10 to 30 volts.
- What types of motors can the MC33035DW control?
The MC33035DW can control both brushless DC motors and brush DC motors with an external MOSFET H-bridge.
- What are the key protective features of the MC33035DW?
The key protective features include undervoltage lockout, cycle-by-cycle current limiting, internal thermal shutdown, and a unique fault output.
- How does the MC33035DW handle sensor phasing?
The MC33035DW can be configured for either 60°/300° or 120°/240° sensor electrical phasing inputs using the 60°/120° select pin.
- Is the MC33035DW suitable for automotive applications?
Yes, the NCV prefix version 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 MC33035DW?
The maximum operating junction temperature is 150°C.
- Can the MC33035DW be used in closed-loop servo applications?
Yes, it has a fully accessible error amplifier for closed-loop servo applications.
- 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 purpose of the Output Enable input?
The Output Enable input controls the motor on/off function; a logic high enables the motor to run, while a logic low causes it to coast.
- What is the significance of the Brake input?
A logic low state on the Brake input allows the motor to run, while a logic high state does not allow motor operation and causes rapid deceleration if the motor is operating.
