ip4001tf Interpion semiconductor Inc., ip4001tf Datasheet - Page 5

• Manufacturer Part Number: ip4001tf
• Description: 5-ch Motor Drive Ic Semiconductor
• Manufacturer: Interpion semiconductor Inc.

August. 2002
- Reference & all mute
- Mute
APPLICATION SUMMARY
When you want to control output bias current of the IP4001, use pin #23 as follows
When you want to control output bias current of the IP4001, you can also use pin#7 as follows
23
Fig1. Reference & all mute function
Fig2. Mute function
7
(Rev.7)
1V
20k
20k
VCC2
VCC2
Q2
30k
Q3
Driver Bias
All Output
Q1
WWW.INTERPIONSEMI.COM
Driver Bias
All Output
5-CH MOTOR DRIVE IC
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,
If the voltage of the pin#7 is high,
the bias circuit operates normally.
so the bias current will be shut down by TR Q3.
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
IP4001
Below 1.0V
Above1.0V
Pin#7
Pin#23
High
Low
Mute
Mute
off
on
off
on
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