DESCRIPTION
The reference command comes from either the digital interface or the pulse-width modulation (PWM)/clock input pin. A 10-bit ADC is employed for accurate sampling of each phase current. The threephase voltage of the motor is modulated through an SVPWM module, which has up to 12-bit resolution at a 20kHz switching frequency. A high-speed high-accuracy magnetic angular sensor is embedded in the IC for rotor position and speed feedback. The position sensor has a data refresh rate up to 1MHz and up to 14-bit position resolution, ideal for BLDC and PMSM motor controls, especially in applications that require high speed or position accuracy. Non-volatile memory (NVM) is employed in the MP6570 to store parameters programmed through the selectable I2C, SPI, or RS485 digital interface. Application design is aided by the MPS e.Motion Family Virtual Bench online developer tool. Full protection features include over-current protection (OCP), rotor-lock protection, and input bus over-voltage (OVP) and over-current protection (OCP).
Monolithic Power Systems
