FCBS0550 데이터 시트보기 (PDF) - ON Semiconductor

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FCBS0550

Smart Power Module (SPM)

ON Semiconductor 

Low-Side

input Signal

Protection

circuit state

Low-Side Internal IGBT

Gate-Emitter Voltage

c6 c7

SET

RESET

c4

c3

c2

SC

c1

Low-Side 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: MOSFET ON and carrying current.

c2 : Short circuit current detection (SC trigger).

c3 : Hard MOSFET gate interrupt.

c4 : MOSFET turns OFF.

c5 : Fault output timer operation starts: The pulse width of the fault output signal is set by the external capacitor CFO.

c6 : Input “L” : MOSFET OFF state.

c7 : Input “H”: MOSFET ON state, but during the active period of fault output the MOSFET doesn’t turn ON.

c8 : MOSFET OFF state

Figure 8. Short-Circuit Current Protection (Low-side Operation only)

FCBS0550 Rev. A

10

www.fairchildsemi.com

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