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DATA SHEET
MCT8315A High Speed Sensorless Trapezoidal Control Integrated FET BLDC Driver
1 Features
- Three-phase BLDC motor driver with integrated sensorless motor control algorithm
- Code-free high speed Trapezoidal Control
- Supports up to 3 kHz (electrical frequency)
- Very fast start-up time (< 50 ms)
- Fast Deceleration (< 150 ms)
- Supports 120° or 150° modulation to improve acoustic performance
- Windmilling support through forward resynchronization and reverse drive
- Analog, PWM, freq. or I2C based speed input
- Active Demagnetization to reduce power losses
- Configurable motor start-up and stop options
- Closed speed/power loop options
- Anti-voltage surge (AVS) protection prevents DC bus voltage spike during motor deceleration
- 4.5- to 35-V operating voltage (40-V abs max)
- High output current capability: 4-A peak
- Low MOSFET on-state resistance
- RDS(ON) (HS + LS) at TA = 25°C : 240-mΩ (typ.)
- Low power sleep mode
- 5-µA (maximum) at VVM = 24-V, TA = 25°C
- Speed loop accuracy: 3% with internal clock and 1% with external clock reference
- Customer-configurable non-volatile memory (EEPROM) to store device configuration
- Supports up to 100-kHz PWM frequency for low inductance motor support
- Does not require external current sense resistors; uses built-in current sensing
- Built-in 3.3-V, 20-mA LDO regulator
- Built-in 3.3-V/5-V, 170-mA buck regulator
- Dedicated DRVOFF pin to disable (Hi-Z) outputs
- Spread spectrum and slew rate for EMI mitigation
- Suite of integrated protection features
- Supply under voltage lockout (UVLO)
- Supply over voltage protection (OVP)
- Motor lock detection (5 different types)
- Over current protection (OCP)
- Thermal warning and shutdown (OTW/TSD)
- Fault condition indication pin (nFAULT)
- Optional fault diagnostics over I2C interface
