MCF8315A1VRGFR

• 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)
  • I 2C 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
  • R DS(ON) (HS + LS) at T A = 25°C : 240-mΩ (typ.)
• Low power sleep mode : Refer
  • 5-µA (maximum) at V VM = 24-V, T A = 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 I 2C interface

The MCF8315A provides a single-chip, code-free sensorless FOC solution for customers driving speed-controlled 12- to 24-V brushless-DC motors (BLDC) or Permanent Magnet Synchronous motor (PMSM) up to 4-A peak current. The MCF8315A integrates three ½-bridges with 40-V absolute maximum capability and a low R DS(ON) of 240 mΩ (high-side + low-side FETs). MCF8315A integrates power management circuits including an voltage-adjustable buck regulator (3.3 V / 5 V, 170-mA) and LDO (3.3 V / 20 mA) that can be used to power external circuits.

The FOC algorithm configuration can be stored in non-volatile EEPROM, which allows the device to operate stand-alone once it has been configured. The device receives a speed command through a PWM input, analog voltage, variable frequency square wave or I 2C command. There are a large number of protection features integrated into the MCF8315A, intended to protect the device, motor, and system against fault events.