Santa Clara, Calif. -- LAPIS Semiconductor Co., Ltd., a ROHM Group Company, has introduced a family of 8-bit microcontrollers for single-phase DC motor control that supports a wide variety of applications. The ML610Q101 and ML610Q102 include peripherals and functions designed to control small single-phase DC motors with greater efficiency and lower noise compared with previous solutions.
The ML610Q101 and ML610Q102 provide optimized features that enable precise control of the rotation and speed of single-phase fans and motors, while using few external components, in electrically noisy environments, such as industrial equipment and computer systems. The high noise immunity (tested to +/-30kV in IEC61000-4-2 noise testing) of the devices enables them to be used in applications with demanding environmental electrical noise requirements.
The 8-bit microcontrollers also use a high-accuracy internal oscillator and multiple timers to reduce rotational speed variations, minimizing audible noise. In addition, built-in hysteresis allows the differential comparator to monitor the Hall element on the motor to determine motor speed and direction to ensure precise speed control, said LAPIS. They are housed in a compact 16-pin package (4 x 4 mm), allowing them to be used in small fans.
LAPIS also developed an integrated oscillator circuit and voltage regulator for the internal power supply that do not require external capacitors, resistors or crystals. The benefits include a two-fold improvement in oscillator accuracy compared with previous methods and reduced board space because external components are not required, said LAPIS. The high accuracy oscillator circuit allows for minimal rotational variations and precise speed when controlling single-phase fan motors, while six 8-bit timers allow the software to provide quiet, high efficiency motor performance through soft switching control, added the company.
ROHM also offers a ML610Q102 reference board along with software development and debug tools.
Pricing: The ML610Q101-NNNMBZ0ATL is priced at $0.45 in quantities of 10,000 and the ML610Q102-NNNMBZ0ATL is priced at $0.50 in quantities of 10,000.