The ML610Q101 and ML610Q102 utilize optimized motor control technology to control the rotation of single-phase fan motors. Furthermore, the industry-leading, high-precision oscillator circuit reduces rotational variations, while multiple timers minimize noise. It also integrates a differential hysteresis comparator, allowing the use of a Hall effect element and contributing to cost reduction. Additional features include a compact 16-pin, 4mm x 4mm package, ensuring compatibility with small fans, and high noise immunity (meeting the IEC61000-4-2 noise test at ±30kV), making it ideal for applications with demanding noise requirements, such as industrial equipment.
In recent years, as electronic equipment has become more compact, devices such as PCs and servers require smaller cooling fan motors. CPU servers that process large amounts of data often use multiple cooling fans, and variations in the rotation speed of each fan can generate a whirring noise due to differences in wind noise frequencies. Furthermore, if the current change during ON/OFF switching in the motor coil current control is too large, irritating electromagnetic noise can occur. Overcoming these obstacles requires smaller microcontrollers with high-precision rotation control.
In response, LAPIS Semiconductor has developed an integrated oscillator circuit and a logic power supply regulator that requires no external capacitor, providing a twofold improvement in oscillator accuracy compared to conventional models—the highest in the industry. This minimizes rotational variations with single-phase fan motor rotation control, while multiple timers provide high-efficiency, quiet performance through smooth switching operation. As a result, the number of required components can be reduced, since there is no need to add an external oscillator or capacitors for the logic power supply regulator. Furthermore, the compact package allows for the use of smaller mounting boards.
The carefully designed circuit and its arrangement have enabled high noise immunity, making it possible to exceed the ±30 kV level, surpassing the measurement limit of Class 4 (±15 kV), the highest class defined by the IEC 61000-4-2 standard. This makes the LSI suitable for use in industrial equipment with stringent noise requirements.
A comprehensive support system is provided, including an ML610Q102 reference table and software development environment, making it easy to begin evaluating the ML610Q101 and ML610Q102. Manuals, support tools, and other materials are also available on the ROHM website (registration required).
Main Features
- Equipped with LAPIS Semiconductor's original high-performance 8-bit RISC core
- High-precision oscillator (8.192MHz): ±1% (25°C), ±2% (-10°C to +85°C),
±2.5% (-40°C to +85°C)
- No external capacitance required for the logic power supply
- 4 kB flash (ML610Q101), 6 kB flash (ML610Q102)
- 256B RAM
- 8-bit timer x 6 (one 8-bit timer x 2 can be used as a 16-bit timer)
- 16-bit PWM x 1 with dead time suitable for motor control (16.384MHz)
- Hysteresis comparator with reference voltage and differential input switching x 1
- Comparator with reference voltage x 1
- 6-channel 10-bit ADC
- Circuit Power supply voltage monitoring
- Operating frequency: 30 kHz to 8.4 MHz
- Operating temperature: -40°C to +85°C
- Power supply voltage: 2.7 V to 5.5 V
- Packages: SSOP16, WQFN16
Applications:
Household appliances, industrial equipment, single-phase ventilation motors, LED lighting, battery charge controllers, and others.
