FAN8400D (FAN8400BD3)

10

5. FG AMP & FG Schmidt Comparator Block

• This block measures of motor rotation speed and controls motor speed.

• It is determined FG AMP gain and filter by external component.

• FG schmidt block change sine wave form to square wave form

6. Error AMP Block

• It composes of dumping filter and ripple filter by external component.

• It determines output amplitude of error AMP by width error pulse.

• It is determined output current by output amplitude of error AMP.

• Bidirectional torque control

7. Regulator Block

• Power supply of control circuits in inside.

• Band gap reference circuits.

8. Lock Detector

• It is low when FG frequency reaches capture range of clock frequency.

• Open correct

9. FG Pulse Output

• Monitoring pin for motor rotative speed

• Open correct

10. Stop And Start

• Stop mode: Open or high voltage

• Start mode: Low voltage

V

DZ

Reverse

Direction

Forward

Direction

V

RF

V

EO

V