Datasheet

11 www.fairchildsemi.com

FSBB30CH60C Rev. D

FSBB30CH60C Smart Power Module

(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

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)

Internal IGBT

Gate-Emitter Voltage

Lower arms

control input

Output Current

Sensing Voltage

of the shunt

resistance

Fault Output Signal

SC Reference Voltage

CR circuit time

constant delay

Protection

circuit state

SET

RESET