AD6392 Interpion, AD6392 Datasheet - Page 7

• Manufacturer Part Number: AD6392
• Description: 4 Ch Motor Drive IC
• Manufacturer: Interpion

April. 2002
- Mute function through MUTE pin
APPLICATION SUMMARY (Continued)
- Thermal shutdown (TSD)
Mute function is also performed at MUTE pin (pin15). The logic is as followers:
The AD6392 has a thermal protection against the abnormal high temperature operation to protect the chip.
Fig. 3 Thermal shut down
(Rev.0)
Fig. 2 Mute function
www.interpionsemi.com
4-CH MOTOR DRIVE IC
AD6392
As it can be seen in Fig. 2, If the voltage of the pin15
become low (below 0.5V) or open, Q3 becomes off and
Q4 on, and hence the bias currents for all channel
drivers are shut down and muted. If the voltage of the
pin15 become high (above 2.0V), the channel drivers
operate normally.
Q5 is biased through the resistor string from the
internal bandgap reference voltage so that it
remains in off state at the ranges of the normal
operating temperatures. If the junction tempera-
ture rises above 175
and hence Q7 turns on, and all channel drivers
are muted as the bias currents are shut down.
When the junction temperature falls below 150
O
operate normally. The hysteresis temperature is,
thus, 25
Falls below 150
C, Q5 and Q7 are turned off and the drivers
Pin15
High
Low
Above 175
Temperature
Hysteresis
O
C
O
C
O
C
O
Mute
C, Q5 turns into on state
off
on
25
mute
on
off
O
C
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