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IP4011

5-CH MOTOR DRIVE IC

Interpion semiconductor 

IP4011

5-CH MOTOR DRIVE IC

APPLICATION SUMMARY (Continued)

- Tray motor speed control

The amplitude of the output voltage is controlled by pin20(CTL).

VCC

VCC1

R

50k

20

Speed

Control

Level

Shift

ZD 50k

Fig6. Tray motor speed control

Normally, the differential output voltage is 3.1V when the pin20(CTL) is open.

If you want to control differential output voltage of the tray drive part, insert external resistor R and zener

diode ZD as shown in figure 6.

Zener diode ZD is only needed when you want to obtain a precision output voltage,

In other case you only insert an external resistor R.

- Regulator part

IP4011 has a temperature independent voltage source internally.

So in the figure 7, the reference voltage (2.5V) is generated by the internal circuit (bandgab reference).

VCC2

Because the power NPN TR Q5 is inserted

internally, there is no need to attach

an external active component.

2.5V

The output voltage of the regulator is

Calculated as follows

6

3.3K

3.3K

+

- 103

3.3K

Vreo = (1+ ) x 2.5 = 5V

3.3K

And he capacitor 1uF is used as a ripple

& noise eliminator and should have a good

Temperature characteristics.

Internal circuit

External circuit

Fig7. Regulator

August. 2002 (Rev.5)

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