OB6627H BLDC Motor Control IC

The OB6627H is a highly integrated, high-performance and low-cost controller for three-phase brushless DC (BLDC) and permanent-magnet synchronous (PMSM) motors, needing few external parts to build a complete field-oriented-control (FOC) drive. It combines a 32-bit ARM Cortex-M0 core running at up to 50 MHz, a three-phase half-bridge gate driver, a precision 5 V regulator, three high-bandwidth rail-to-rail operational amplifiers, three high-speed comparators and two motor-current protection comparators. The core carries 32 kB flash and 4 kB SRAM together with a CORDIC engine and a multiply-divide unit, and the PWM, amplifier, comparator and ADC blocks are linked for motor control, which simplifies high-performance algorithm development. Protection includes supply undervoltage and overvoltage, high-side driver supply undervoltage, over-temperature, shoot-through prevention with built-in dead time, and motor over-current and short-circuit protection.

Key Features

• ARM Cortex-M0 core at 50 MHz with nested vectored interrupt controller (NVIC)
• Wide 1.8 V to 5.5 V operating range
• 32 kB on-chip flash program memory and 4 kB SRAM
• CORDIC engine and multiply-divide unit for FOC math
• Three high-bandwidth rail-to-rail op-amps and three high-speed comparators
• Two motor-current protection comparators
• Supply UVLO/OVP, over-temperature, shoot-through protection, motor OCP and SCP

Applications

• Sensorless and sensored BLDC/PMSM drives
• Three-phase and single-phase AC induction motors
• Fans, vacuum cleaners, power tools, pumps and compressors

Part Numbers

• OB6627HGQ

Product family: On-Bright official page