Three-Phase PMSM/BLDC Motor Controller with Pre-Driver

The RT7079 is an application specific IC designed for PMSM/BLDC motor applications. This two-in-one ASIC integrates several functional circuits, namely a 3-phase motor controller, a 3-phase gate driver, three bootstrap diodes, a 5V LDO regulator and a buck converter. The RT7079 embeds the ARM 32-bit Cortex-M0 core with peripheral circuits to perform the sensorless with field oriented control (FOC). In addition, several system level peripheral functions, such as ADC, DAC, communication interface, SVPWM, watchdog timer, current sensing, undervoltage-lockout (UVLO), short circuit protection (SCP) and locked-rotor protection are integrated so as to reduce component count, PCB size and system cost.

Furthermore, the RT7079 drives external N-Channel MOSFETs in three half-bridge configuration with a built-in bootstrap network up to 58V. A dead time control is built-in to prevent shoot-through of the external N-Channel MOSFETs.

The RT7079 is available in WQFN-48L 7x7 package.