IP9001

4-CH MOTOR DRIVE IC FOR PORTABLE CDP

- 12 -

www.interpionsemi.com

APPLICATION SUMMARY

MUTE34(pin19)

HIGH

CH3,CH4

normal operation

LOW

CH3,CH4 shut down

MUTE2(pin21)

CH2 shut down

CH2 normal operation

BRAKE1(pin23)

CH1 shut down

CH1 normal operation

Table2. Reference all mute

- Mute function using the MUTE and BRAKE pin (Channel mute)

Mute function for each channels can be obtained using the MUTE pin (pin19,pin21) and BRAKE pin (pin23).

* When the voltage of the pin19 becomes low , the bias currents for CH3,CH4 are shut down and those

corresponding channels are muted. On the contrary, when the voltage of the pin19 becomes high, the channel

drivers operate normally.

* When the voltage of the pin21,23 become high , the bias currents for CH1,CH2 are shut down and those

corresponding channels are muted. On the contrary, when the voltage of the pin21,23 become low, the channel

drivers operate normally.

- All mute function using the REF pin (Reference all mute)

Muting all channel drivers can be obtained using the REF (signal reference) pin.

* When the input voltage of the signal reference pin (pin16) is below 1.0V, the bias currents of all channel

drivers are shut down.

VREF(Pin16)

Above 1.0V

CH1,CH2,CH3,CH4 normal operation

Below 1.0V

CH1,CH2,CH3,CH4 shut down

Table1. Channel mute & brake

- Thermal shutdown (TSD)

The IP9001 has a thermal protection.

If the chip temperature rises above 175

circuit. The hysteresis temperature is 25

Temperature

All channel mute

Above 175

on

Falls below 150

off

Hysteresis

25

Table3. Thermal shut down

1. BTL driver