MCF8329ASensorless Field Oriented Control (FOC) Three-phase BLDC Gate Driver

1 Features

Three-phase BLDC gate driver with integrated sensorless motor control algorithm
- Code-free single shunt Field Oriented Control
- Supports up to 1.8 kHz (electrical frequency)
- Support flux weakening control
- Forward and reverse windmilling support
- Analog, PWM, freq., or I²C based control input
- Configurable motor startup and stop options
- Optional closed-loop speed or power or current control or modulation index control
- 5-point configurable reference profile support
- Anti-voltage surge prevents overvoltage
- Improved acoustic performance with automatic dead time compensation
- Support maximum torque per ampere (MTPA)
- Offline motor back EMF measurement
- Variable monitoring through DACOUT
65-V Three-phase gate driver
- Drives 3 high-side and 3 low-side N-Channel MOSFETs, 4.5 to 60-V operating voltage
- Supports 100% PWM duty cycle
- Bootstrap-based gate driver architecture
- 1-A/2-A Maximum peak source/sink current
Integrated current sense amplifier
- Adjustable gain (5, 10, 20, 40 V/V)
Low-power sleep mode
- 5-µA (maximum) at V_PVDD = 24-V, T_A = 25°C
Speed loop accuracy: < 3% with internal clock
Configurable non-volatile memory (EEPROM) to store device configuration
Supports up to 75-kHz PWM frequency for low inductance motor support
Accurate LDO (AVDD) 3.3-V ±3%, 50-mA support with AVDD connected to VREG
Independent driver shutdown path (DRVOFF)
Spread spectrum for EMI mitigation
A suite of integrated protection features
- Supply under-voltage lockout (UVLO)
- Motor lock detection (3 different types)
- Over-current protection (OCP)
- Thermal shutdown (TSD)
- Fault condition indication pin (nFAULT)
- Optional fault diagnostics over I²C interface