OB6617 is a highly integrated, high-performance, low-cost brushless DC motor (BLDC) and permanent magnet synchronous motor (PMSM) control chip, which only requires a small number of peripheral components to build a complete BLDC/PMSM control circuit. The OB6617 integrates a high-performance MCU, a 3-phase full-bridge driver, a high-precision 5V regulated power supply, a high-speed rail-to-rail operational amplifier, and a motor drive current protection comparator. The motor control circuit using the OB6617 is flexible, smaller and less costly.

The OB6617 supports the development of control programs, integrates 6 PWM and drive current sampling, and provides 22 external GPIOs, which can be multiplexed as analog-to-digital sampling, PWM, 3-channel digital comparator, serial communication and other interfaces. Meets most motor applications.

OB6617 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.

characteristic

High-performance 1T-8bit MCU

· Built-in 22.1184MHz RC oscillator, support frequency division

· 8-channel 10-bit ADC

· 8-channel 14-bit PWM

· 3-channel comparator

· Hardware multiplier and divider

· 16kB Flash,1kB+256Byte SRAM

· 22 external GPIOs

Three-phase full-bridge driver

· Three bootstrap high-side drivers

· 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

High-speed rail-to-rail op amps

· The gain-bandwidth product is greater than 1.1MHz

· The slew rate is greater than 10V/us

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

On-chip oscillator

· HIRC: 22.1184MHz, (±2%, -40°C~85°C)

· LIRC: 23KHz, ±20%

apply

· Power tools

· Electric garden tools

· BLDC/PMSM variable frequency drives