FNB50560T1 Datasheet, PDF (11/14 Pages) Fairchild Semiconductor – Motion SPMR 55 Series

Lower arms
control input
Protection
Circuit state
Internal IGBT
Gate-Emitter Voltage
c1
Output Current
c6 c7
SET
RESET
c4
c3
c2
SC
c8
Sensing Voltage
of the shunt
resistance
Fault Output Signal
SC Reference Voltage
CR circuit time
c5 ^{constant delay}
(with the external shunt resistance and CR connection)
c1 : Normal operation: IGBT ON and carrying current.
c2 : Short circuit current detection (SC trigger).
c3 : Hard IGBT gate interrupt.
c4 : IGBT turns OFF.
c5 : Input “L” : IGBT OFF state.
c6 : Input “H”: IGBT ON state, but during the active period of fault output the IGBT doesn’t turn ON.
c7 : IGBT OFF state
Figure 11. Short-Circuit Protection
Hin
Lin
Ho
d1
Lo
d3
d4
d5
d2
/Fo
d1 : High Side First - Input - First - Output Mode
d2 : Low Side Noise Mode : No Lo
d3 : High Side Noise Mode : No Ho
d4 : Low Side First - Input - First - Output Mode
d5 : In - Phase Mode : No Ho
Figure 12. Inter-Lock Function
Hin : High-side Input Signal
Lin : Low-side Input Signal
Ho : High-side IGBT Gate Voltage
Lo : Low-side IGBT Gate Voltage
/Fo : Fault Output
©2014 Fairchild Semiconductor Corporation
11
FNB50560T1 Rev. C0
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