Toshiba has introduced the industry’s first single-chip sensorless motor controller to offer full-wave sine wave PWM motor drive output. The new TB6582FG significantly reduces the complexity and component count of brushless DC (BLDC) motor applications.

No Programming
Unlike MCU-based alternatives, the new controller device is a cost optimized state machine which does not even require programming. Specifically, the TB6582FG takes the analog speed inputs supplied by a host microcontroller and provides a complete full-wave sine wave PWM drive output without the need for additional processing. The sinusoidal motor coil current waveform provides for smoother BLDC motor operation and lower electrical and acoustic noise than is possible with conventional PWM outputs while still allowing designers to realise the benefit of pulse-width modulation efficiency.

Reduced Component Count
The TB6582FG has on-board circuitry that accurately calculates rotor speed and position using phase current information, allowing designers to eliminate the need for Hall sensors. This not only reduces component count but also improves application reliability, while making the TB6582FG ideal for applicationswhere addition of sensors is not practical or commercially unviable.

Integrated Dead Time Function
The TB6582FG features a built-in triangular wave generator with a carrier wave frequency of fosc/252Hz and an integrated dead time function that allows safe operation of the power FETs in a push-pull configuration. Control of motor rotation speed in both forward and reverse directions is achieved by changing the PWM duty cycle based on the input from the host microcontroller.
Suitable for operation with supply voltages from 6.5 to 16.5 V, Toshiba’s new motor controller SoC features an on-board regulator that provides a typical reference voltage of 5 V. Lead angle adjustment capability allows designers to tune their applications for optimum efficiency.

Avalability
Engineer samples are available now. Production quantities are announced for April 2008.

Additional Information
For detailed specifications please contact your local SPOERLE Branch Office ce or visit

www.toshiba-components.com