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IP4001

5-CH MOTOR DRIVE IC

Interpion semiconductor 

IP4001

5-CH MOTOR DRIVE IC

APPLICATION SUMMARY

- Reference & all mute

When you want to control output bias current of the IP4001, use pin #23 as follows

VCC2

Pin#23

Mute

All Output

Driver Bias

Above 1.0V

off

23

Q1

Below 1.0V

on

30k

1V

Fig1. Reference & all mute function

As shown in figure 1,

Pin#23 is a negative input of the comparator,

and the other Input is the 1.0V reference.

If the voltage of the pin#23 falls below 1.0V,

TR Q1 will be turned on and the output bias current

will be shut down

- Mute

When you want to control output bias current of the IP4001, you can also use pin#7 as follows

VCC2

7

20k

20k

All Output

Driver Bias

Q3

Q2

Pin#7

High

Low

Mute

off

on

As shown in figure 2,

Pin#7 is a base input of the TR Q2.

If the voltage of the pin#7 is low or open,

TR Q2 will be turned off and TR Q3 will be turned on,

so the bias current will be shut down by TR Q3.

If the voltage of the pin#7 is high,

the bias circuit operates normally.

Fig2. Mute function

August. 2002 (Rev.7)

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