July 7, 2011
The device has a multi-chip internal structure for lower thermal resistance. The control IC (MIC) and the four power elements (MOSFET) are all separate ICs. The package (HSOP) provides wide output terminals at each corner, further enhancing device thermal dissipation.
The built-in excitation distribution circuit (sequencer) allows motor control using only the Clock signal for simple operations (forward, reverse, hold), with motor speed control by frequency input into Clock pin, and rotation direction control by a dedicated logic input. This eliminates logic signal lines required for conventional phase-input methods, and reduces demand on heavily-used CPUs.
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