Overview
The MC33035P 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 is constructed using bipolar analog technology, offering high performance and ruggedness in hostile industrial environments.
The controller 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 totem pole bottom driver outputs. It also features protective mechanisms like undervoltage lockout, cycle-by-cycle current limiting, internal thermal shutdown, and a fault output for microprocessor interface.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Voltage Range | VCC | 10 | - | 30 | V |
| Reference Output Voltage | Vref | 5.9 | 6.25 | 6.57 | V |
| Line Regulation | Regline | - | - | 1.5 | mV |
| Load Regulation | Regload | - | - | 30 | mV |
| Bottom Drive Output Current (Source or Sink) | IDRV | - | - | 100 | mA |
| Operating Junction Temperature | TJ | - | - | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 85 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
Key Features
- Operates with electrical sensor phasings of 60°/300° or 120°/240°
- Can efficiently control brush DC motors with external MOSFET H-bridge
- Undervoltage lockout and internal thermal shutdown
- Cycle-by-cycle current limiting with selectable time delayed latched shutdown mode
- Unique fault output for microprocessor interface
- Temperature-compensated reference capable of supplying sensor power
- Frequency-programmable sawtooth oscillator
- Three open collector top drive outputs and three high current totem pole bottom driver outputs
- Fully accessible error amplifier for closed-loop servo applications
- Pinned-out current sense reference
- AEC-Q100 qualified and PPAP capable for automotive and other applications
- Pb-free packages available
Applications
The MC33035P is versatile and can be used in various applications, including:
- Brushless DC motor control systems in industrial, automotive, and consumer electronics
- Control of three-phase and four-phase motors
- Closed-loop servo applications with the use of an external error amplifier
- Dynamic braking and forward or reverse rotation control
- Systems requiring high reliability and ruggedness in hostile environments
Q & A
- What is the operating voltage range of the MC33035P?
The MC33035P operates within a voltage range of 10 to 30 V.
- What types of sensor phasings does the MC33035P support?
The MC33035P supports electrical sensor phasings of 60°/300° or 120°/240°.
- Can the MC33035P control brush DC motors?
Yes, the MC33035P can efficiently control brush DC motors with an external MOSFET H-bridge.
- What protective features does the MC33035P have?
The MC33035P 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.
- How does the MC33035P handle motor direction control?
The motor direction is controlled by the Forward/Reverse input, which reverses the commutation sequence when changed.
- What is the maximum operating junction temperature of the MC33035P?
The maximum operating junction temperature is 150°C.
- Is the MC33035P suitable for automotive applications?
Yes, the MC33035P is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other demanding applications.
- What type of packages are available for the MC33035P?
The MC33035P is available in Pb-free packages.
- Can the MC33035P be used in closed-loop servo applications?
Yes, the MC33035P has a fully accessible error amplifier for closed-loop servo applications.
