Avago Technologies ACPL-336J-000E - Manual (Page 9)

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AV02-4404EN - February 6, 2014
Figure 8 shows the actual Desat 7 V threshold detection that triggers the V
G
output soft-shutdown as well as /Fault feed-
back pin voltage is pulled low to inform microcontroller that a fault has been detected.
Figure 8. Desat Protection & Fault Feedback
Figure 9 shows that the V
CC2
voltage sag below UVLO- level (between 11~12 V) triggers the UVLO and shutdown the
output V
G
level and recovers after normal V
CC2
voltage recovers above UVLO+ level (between 12~13 V). The /UVLO pin
voltage is also pulled low throughout the same duration to inform the microcontroller that severe V
CC2
level drop has
happened.
Figure 9. UVLO Feedback
In conclusion, with these sophisticated IGBT gate driving and driver protection schemes built-in, ACPL-337J is well suited
for modern IGBT applications such as Motor Control and Voltage inverters.
7 V
Desat
Fault detected
Fault Feedback
15V14V 13V12V
11V
12V 13V 14V
15V
V
G
output
/UVLO
V
CC2
V
IN+
V CC2
undervoltage detected V CC2
’Normal’ detected
UVLO reported