OB6628x

Genenal Description

OB6628x is an application-specific 3-phases BLDC/PMSM controller system on chip (SOC). The IC is optimized for low cost, high-efficiency drive circuits in applications needs.

It’s easy to built BLDC/PMSM control circuit with current loop and speed loop by simple components.

OB6628x includes Cotex-M0 MCU,three phases level shift drivers, 5V_LDO and motor driving current protection comparator.

Applications

· Sensor/Sensorless BLDC/PMSM Controller

· Power Tools, Garden Tools, FAN, Pump etc

Features

ARM Cortex-M0

· Operating frequencies up to 72MHz

· Wide operation voltage: 1.8V to 5.5V

· 32kB Flash + 4kB SRAM

· 12bit, 1MHz sampling rate ADC

· 3 BEMF detecting analog comparators + 1 current protection analog comparators.

· 3 Operational Amplifiers.

· Coprocessor: 2 MDU + 1Cordic

· 1 UART, 1IIC, 1 SPI

· 2 16Bit Counter/Timer, 2 32bit Counter/Timer.

· 16bit PWM, 6 PWM events trigger ADC.

Three phases bridge driver

· Integrated 70V three phases bootstrap driver.

· Driver current : -0.5A/1.1A

· Low side supply under-voltage lockout(UVLO), and over voltage protection(OVP)

· High side floating supply under-voltage lockout(UVLO)

· Build in dead-time

· Build in cross conduction protection logic

LDO

· 4.6V to 17V supply voltage range

· Output 5V±2%,max 100mA

· Internal thermal overload protection

· Internal current limiting protect when output short

Over Current Protection

· Built in Comparators, adjustable reference setup

· Short circuit protection(SCP) turns off six drivers, and sets fault output low with latching 1ms.

· SCP soft turn off.

Internal OSC

· HIRC: 24MHz (±1%, 25°C)

· LIRC: 20KHz (±30%, 25°C)

OB6628x

Genenal Description

Applications

Features

TYPICAL APPLICATION