OB6627H is a highly integrated, high-performance, low-cost 3-phase brushless DC motor (BLDC) or permanent magnet synchronous motor (PMSM) control chip, which requires only a small number of peripheral components to build a complete magnetic field oriented control (FOC) circuit.
OB6627H integrates a 32-bit ARM Cortex-M0 MCU, a 3-phase half-bridge driver, a high-precision 5V regulated power supply, a high-bandwidth/high-slew-rate/rail-to-rail operational amplifier, a high-speed general-purpose comparator, and a motor-driven current-protection comparator. The MCU operates at 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) for motor control, and linkage between different modules, making it easy to develop high-performance algorithms.
OB6627H 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, bridge arm anti-pass-through protection; The drive circuit has a built-in dead zone; Motor drive over-current protection, short-circuit protection, etc.
OB6627H is available in LQFP48 (7*7mm) package.
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
12-channel 12-bit ADC
3 sets of 8MHz, 10V/us operational amplifiers
1 set of analog comparators
Serial In-Circuit Debugging (SWD)
Coordinate Rotation Digital Computer (Cordic)
Multiplication and Division Unit (MDU)
Three-phase full-bridge driver
150V triple bootstrap high-side driver
Three low-side drivers
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
apply
Non-inductive/inductive BLDC/PMSM, three-phase/single-phase AC induction motors
Fans, vacuum cleaners, power tools, pumps, compressors, etc