FAN8423D3

9

Rev. 1.0.1

Oct. 2000.

2. Short Brake

When the pick-up mechanism moves from the inner to the outer spindle of the CD, the Brake function of the reverse voltage is

commonly employed to decrease the rotating velocity of the Spindle Motor.

However, if the Spindle Motor rotates rapidly, the Brake function of the reverse voltage may produce more heat at the Drive

IC.

To remove this shortcoming and to enhance the braking efficiency, the Short Brake function is added to FAN8423D3. When

the Short Brake function is active, all upper Power TRs turn off and all lower Power TRs turn on. This slows down the motor.

3. Start/stop (Power Save)

When Start/Stop function is active, all Power TRs turn off.

Pin # 18

Short Brake

High

ON

Low

OFF

Pin # 23

Start/Stop

High

Operate

Low

Stop

2

4

7

18

Vcc

ON

OFF

20K

Ω

1K

Ω

MOTOR

OFF

ON

2

4

7

23

Vcc

Start

Stop

30K

Ω

40K

Ω

MOTOR

OFF

OFF