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Data Sheet
MCF8315A Sensorless Field Oriented Control (FOC) Integrated FET
BLDC Driver
1 Features
- Three-phase BLDC motor driver with integrated sensorless motor control algorithm
- Code-free Field Oriented Control (FOC)
- Analog, PWM and freq. based speed input modes: available only when MCF8315A is configured as a standby device (DEV_MODE = 0b)
- I2C based speed input mode: available in both sleep (DEV_MODE = 1b) and standby devices (DEV_MODE = 0b).
- Offline motor parameters measurement with Motor Parameter Extraction Tool (MPET)
- 5-point configurable speed profile support
- Windmilling support through forward resynchronization and reverse drive
- Anti-voltage surge (AVS) protection
- Improved acoustic performance with automatic dead time compensation
- 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: Refer Table 7-6
- 5-µA (maximum) at VVM = 24-V, TA = 25°C
- Speed loop accuracy: 3% with internal clock and 1% with external clock reference
- Supports up to 75-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
