Overview
The MC33035 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 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 drivers. The MC33035 can efficiently control both brushless DC motors and brush DC motors with external MOSFET H-bridges. Constructed with bipolar analog technology, it offers robust performance and ruggedness in hostile industrial environments.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Voltage | VCC | 10 | - | 30 | V |
| Reference Output Voltage | Vref | 5.9 | 6.25 | 6.57 | V |
| Top Drive Output Sink Saturation | VCE(sat) | - | - | 1.5 | V |
| 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
- Undervoltage lockout and internal thermal shutdown for enhanced reliability.
- Cycle-by-cycle current limiting with a selectable time delayed latched shutdown mode.
- A unique fault output that can be interfaced into microprocessor-controlled systems.
- 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 drivers suitable for driving power MOSFETs.
- Selectable 60°/300° or 120°/240° sensor phasings.
- Can efficiently control brush DC motors with an external MOSFET H-bridge.
- AEC-Q100 qualified and PPAP capable for automotive and other demanding applications.
- Pb-free packages available.
Applications
- Brushless DC motor control in industrial, automotive, and consumer electronics.
- Control of three-phase and four-phase motors.
- Efficient control of brush DC motors using external MOSFET H-bridges.
- Use in microprocessor-controlled systems for advanced motor control and monitoring.
- Applications requiring high reliability and ruggedness, such as in hostile industrial environments.
Q & A
- What is the operating voltage range of the MC33035?
The MC33035 operates within a voltage range of 10 to 30 volts.
- What types of motor can the MC33035 control?
The MC33035 can control both brushless DC motors and brush DC motors with an external MOSFET H-bridge.
- What are the key protective features of the MC33035?
The key protective features include undervoltage lockout, cycle-by-cycle current limiting, internal thermal shutdown, and a unique fault output.
- How does the MC33035 handle sensor phasing?
The MC33035 can configure itself to control motors with either 60°/300° or 120°/240° electrical sensor phasing inputs.
- What is the purpose of the rotor position decoder in the MC33035?
The rotor position decoder monitors the three sensor inputs to provide the proper sequencing of the top and bottom drive outputs.
- Can the MC33035 be used in automotive applications?
- What is the maximum operating junction temperature of the MC33035?
The maximum operating junction temperature is 150°C.
- How does the MC33035 handle forward and reverse motor rotation?
The direction of motor rotation can be changed using the Forward/Reverse input, which reverses the voltage across the stator winding.
- What is the function of the error amplifier in the MC33035?
The error amplifier is fully accessible and can be used for closed-loop servo applications.
- What type of technology is used in the construction of the MC33035?
The MC33035 is constructed with bipolar analog technology.
