FNA51560T1 Datasheet, PDF (11/15 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
Lo
Hin : High-side Input Signal
Lin : Low-side Input Signal
Ho : Internal IGBT Gate - Emitter Voltage of High-side
Lo : Internal IGBT Gate - Emitter Voltage of Low-side
Figure 12. Inter-Lock Function
©2014 Fairchild Semiconductor Corporation
11
FNA51560T1/T3 Rev. C0
www.fairchildsemi.com