OB6627x is a highly integrated, high-performance, low-cost 3-phase brushless DC motor (BLDC) or permanent magnet synchronous motor (PMSM) control IC, which requires only a few peripheral components to build a complete field-oriented control (FOC) circuit.
The OB6627x integrates a 32-bit ARM Cortex-M0 MCU, a 3-phase half-bridge driver, a high-precision 5V regulated power supply, three high-bandwidth/high-slew-rate/rail-to-rail operational amplifiers, three high-speed general-purpose comparators, and two motor drive current protection comparators. The MCU can operate at a frequency of 50Mhz, provides 32kB FLASH and 4kB SRAM, integrates a coordinate rotation digital computer (Cordic) and a multiplicative division unit (MDU), and optimizes pulse-width modulation (PWM), operational amplifier (Amplifier), analog comparator (Comparator), analog digital sampler (ADC), and linkage between different modules for motor control, which is easy to develop high-performance algorithms.
OB6627x provides complete chip protection and external motor drive current protection, including chip working power supply under-voltage protection, over-voltage protection, high-side driver power supply under-voltage protection, over-temperature protection, and bridge arm anti-pass-through protection. The drive circuit has a built-in dead zone; Motor drive over-current protection, short-circuit protection, etc.
characteristic
ARM Cortex-M0 core
50MHz with built-in nested vector interrupt controller (NVIC)
Wide operating voltage range: 1.8V to 5.5V
On-chip flash programming memory 32KB; 4KB SRAM
23 external GPIOs
2 sets of 32bit timers/counters; 2 sets of 16-bit timers/counters
8-channel 16-bit PWM
11-channel 12-bit ADC
3 sets of 8MHz, 10V/us operational amplifiers
3 sets of universal comparators, 2 sets of current comparators
Serial In-Circuit Debugging (SWD)
Coordinate Rotation Digital Computer (Cordic)
Multiplication and Division Unit (MDU)
Three-phase full-bridge driver
Three bootstrap high-side drivers, three low-side drivers
Withstand voltage: 85V(OB6627), 65V(OB6627L) ,70V (OB6627P)
Drive current: 0.7A/1.1A(OB6627,OB6627L), 0.5A/1.1A(OB6627P)
Delay matching with the bridge arm drive
Built-in dead zone
Built-in bridge arm pass-through logic
Built-in working power supply under-voltage protection and over-voltage protection; High-side driver power supply undervoltage protection
LDO
The output voltage accuracy is 5V
The output current capability reaches 100mA
Built-in short-circuit protection and over-temperature protection
Motor drive current protection
The comparison threshold is set by an external circuit, which can be used flexibly
The protection comparator shuts down the driver directly
Short-circuit protection triggers an MCU interrupt
Short-circuit protection soft-shutdown MOS reduces voltage spikes
Coordinate Rotation Digital Computer (Cordic)
Multiplication and Division Unit (MDU)
apply
Non-inductive/inductive BLDC/PMSM, three-phase/single-phase AC induction motors
Fans, vacuum cleaners, power tools, pumps, compressors, etc