FSBB15CH60 Motion SPM® 3 Series
©2006 Fairchild Semiconductor Corporation
10
www.fairchildsemi.com
FSBB15CH60 Rev. C6
(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 “LOW”: IGBT OFF state.
c7 : Input “HIGH”: IGBT ON state, but during the active period of fault output, the IGBT doesn’t turn ON.
c8 : IGBT OFF state.
Figure 8. Short-Circuit Protection (Low-Side Operation Only)
Internal IGBT
Gate - Emitter Voltage
Lower Arms
Control Input
Output Current
Sensing Voltage
of Shunt Resistance
Fault Output Signal
SC Reference Voltage
CR Circuit Time
Constant Delay
SC
Protection
Circuit State
SET
RESET
c6
c7
c3
c2
c1
c8
c4
c5
