Time Charts of Protective Function
Input S ignal
Internal IG B T
P3
G ate-E m itter V oltage
UV
C ontrol S upply V oltage
UV
P2
P5
reset
detect
O utput C urrent
Fault O utput S ignal
P1
P4
P6
P1 : Normal operation: IGBT ON and conducting current
P2 : Under-voltage detection
P3 : IGBT gate interrupt
P4 : Fault signal generation
P5 : Under-voltage reset
P6 : Normal operation: IGBT ON and conducting current
Figure 7. Under-Voltage Protection
P5
In p u t S ig n a l
P6
In te r n a l IG B T
G a te - E m itte r V o lta g e
O C D e te c tio n
P1
P4
O u tp u t C u r re n t
S e n s in g V o lta g e
P2
R C F ilte r D e la y
P7
O C R e fe r e n c e
V o lta g e ( 0 .5 V )
F a u lt O u tp u t S ig n a l
P3
P8
P1 : Normal operation: IGBT ON and conducting current
P2 : Over current detection
P3 : IGBT gate interrupt / fault signal generation
P4 : IGBT is slowly turned off
P5 : IGBT OFF signal
P6 : IGBT ON signa: but IGBT cannot be turned on during the fault output activation
P7 : IGBT OFF state
P8 : Fault output reset and normal operation start
Figure 8. Over-Current Protection
?2010 Fairchild Semiconductor Corporation
FPAB30BH60 Rev. C4
8
www.fairchildsemi.com
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