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IP4001S

5-CH MOTOR DRIVE IC

APPLICATION SUMMARY

- All mute function using the REF pin

When the all mute function is required, you can use the reference pin as follows;

Pin 23

Mute

Above 1.0V

off

Below 1.0V

on

- All mute function using the Mute pin

All mute function can be also obtained using the MUTE pin as follows;

Pin 7

Mute

High

off

Low

on

Fig. 1. All mute function using the reference pin

Fig. 2. All mute function using the MUTE pin

Muting all channel drivers can be obtained using the

REF (signal reference) pin. The simplified schematic

diagram for reference all mute function is shown in

Fig.1. When the input voltage of the signal reference

pin (pin23) is below 1.0V, the comparator turns Q1 on

and the bias currents of all output drivers are shut

down.

As we can see in Fig. 2, if the voltage of the pin7

becomes low (below 0.5V) or open, the bias currents

for all output drivers are shut down.

On the contrary, when the voltage of the pin7 becomes

high (above 2.0V), the drivers operate normally.

VCC2

30k

30k

Q2

Q3

7

Bias currents

for output

drivers

- Thermal shutdown

Temperature

mute

on

off

Hysteresis

The IP4001S has a thermal protection against the

abnormal operation. When the junction temperature

This makes the junction temperature be continuously

decreased.

channel operature again.