KA2822D

11

Application Information

1. CHIP ENABLE

This function turns on or off all blocks by low or high signal.

2. U, V AND W PHASE OUTPUT AMP

These ampilifiers drives three output phases - U, V, and W which have 120(degree) phase differences with each other. The

three phase waveforms are made with the two hall sensor signals by synthesizing the third phase signal.

3. SPEED CONTROL PART

This function compares the real motor rotation frequency with the 300 or 360Hz pulse divided from 1MHz clock pulse for

removing speed error when motor is on and speed error is detected by PLL.

The speed error sent to charge pump part which repeats charge and discharge controls the output current of the output amp to

keep a stable rotation.