Toshiba has released two three-phase brushless motor controller ICs “TC78B041FNG” housed in an SSOP30 package and “TC78B042FTG” in a VQFN32 package.
Both adopt InPAC, Toshiba’s original automatic phase adjustment function, to eliminate phase adjustment and achieve high level efficiency at a wide range of motor rotation speeds.
This allows their use with motor drivers of various voltages and current capacities, and they also can be used in combination with intelligent power devices at the output stages.
The controllers are suited for use in home appliances such as air-conditioners and air purifiers, and industrial equipment.
Manufacturers of home appliances and industrial equipment are increasingly using inverters to control fan motors, to meet strong demand for improved energy efficiency and lower noise.
Conventionally, in order to obtain high-level efficiency, it is necessary to adjust the phase of the motor voltage and motor current for individual fan motors.
Realizing high efficiency over a wide range of rotational speeds—from almost zero rotations per minute (rpm) at start-up to high speeds of several 1,000rpm—requires many parts for phase adjustment. It also introduces the need for an MCU control system, and developing that takes time.
With the introduction of InPAC, Toshiba’s original new control technology, which automatically adjusts the phase of the Hall signal and motor current, the new products drive motors with an efficiency equivalent to that of an MCU control system, over a wide range of rotation speeds.
InPAC secures both a high efficiency fan motor drive and sine wave drive that reduces noise.