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This new device includes a back-electromotive force filter to ensure more stable control of the sensor-less square wave during startup and low speed conditions and also includes a hardware MDU to provide increased calculation speed. These features make the device suitable for use in various square wave and sinusoidal wave BLDC motor applications.
The device contains 8K×16 of Flash Program Memory, 2048 bytes of RAM Data Memory, 512 bytes of EEPROM, an operating frequency of up to 20MHz, a (10+1)-channel high speed 12-bit analog to digital converter and four timers which can implement PWM output/capture input functions. For BLDC control, the device provides a BLDC motor control circuit, which contains a 16-bit timer for rotational speed monitoring, three 10-bit complementary PWM outputs with a dead-time function as well as an over current protection (OCP) function.
Holtek Semiconductor is a leading professional IC design house in Taiwan having its major business activities focused in the area of microcontroller and peripheral component design.
