Specifications

35
Dec. 2012
Mitsubishi IPM-series Application Note
The operating-sequence of the SC protection
a1 : The normal operation=IGBT ON
a2 : Short current detection (SCt)
a3 : IGBT gate is blocked softly.
a4 : IGBT turn off gradually.
a5 : Fo timer start (tFo=1.8ms typ.)
a6 : Input signal “H”=OFF
a7 : Input signal “L”=ON
a8 : IGBT maintains off. (When a6~a7 occurs at the time which is shorter than tA)
㩷
input signal
Low=ON
a3
a6
a7
Gate of IGBT
a2
SC
Output current

I(A)
a4
a8
Fo signal
a5
tA
a1
Condition of
protection circuit
SET RESET
㩷
㩷
㩷
Although IPM has internal protection circuit, it is recommended to ensure the stress which exceeds a
maximum rating does not happen repeatedly.
Therefore, if received Fo signal, please stop the control signal and stop the operation of IPM.
Because IPM doesn't exclude extraordinary cause, it has to be stopped by the system.
Using IPM