FSBB30CH60C Datasheet, PDF (11/17 Pages) Fairchild Semiconductor – Smart Power Module

Lower arms
control input
Protection
circuit state
Internal IGBT
Gate-Emitter Voltage
c6 c7
SET
RESET
c4
c3
c2
SC
c1
Output Current
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 : Fault output timer operation starts: The pulse width of the fault output signal is set by the external capacitor C_FO.
c6 : Input “L” : IGBT OFF state.
c7 : Input “H”: IGBT ON state, but during the active period of fault output the IGBT doesn’t turn ON.
c8 : IGBT OFF state
Figure 10. Short-Circuit Current Protection (Low-side Operation only)
11
FSBB30CH60C Rev. D
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