Powerex, Inc., 200 E. Hillis Street, Youngwood, Pennsylvania 15697-1800 (724) 925-7272
PS22053
Intellimod™ Module
Dual-In-Line Intelligent Power Module
10 Amperes/1200 Volts
Protection Function Timing Diagrams
Short-Circuit Protection (N-side only, with external shunt resistor and CR filter)
A7
LOWER-SIDE
CONTROL INPUT
PROTECTION
CIRCUIT STATE
SET
A6
RESET
INTERNAL IGBT GATE
SC
A2
A3
A1
OUTPUT CURRENT IC
SENSE VOLTAGE ON
THE SHUNT RESISTOR
FAULT OUTPUT FO
A4
A8
SC REFERENCE VOLTAGE
RC FILTER TIME
CONSISTANT DELAY
A5
A1: Normal operation – IGBT turn on and conducting current.
A2: Short-circuit current detected (SC trigger).
A3: IGBT gate hard interrupted.
A4: IGBT turn off.
A5: FO output with a fixed pulse width (determined by the external capacitance CFO).
A6: Input “L” – IGBT off.
A7: Input “H” – IGBT on is blocked during the FO output period.
A8: IGBT stays in off state.
Under-Voltage Protection (N-side, UVD)
CONTROL INPUT
PROTECTION
CIRCUIT STATE
RESET
UVDr
CONTROL SUPPLY
VOLTAGE VD
SET
RESET
B1
UVDt
B3
B4
B6
B2
OUTPUT CURRENT IC
B7
FAULT OUTPUT FO
B5
B1: Control supply voltage rise – After the voltage level reaches UVDr, the drive circuit begins to work
at the rising edge of the next input signal.
B2 : Normal operation – IGBT turn on and conducting current.
B3: Under-voltage trip (UVDt).
B4: IGBT turn off regardless of the control input level.
B5: FO asserted during the period from minimum pulse width or until control supply recover to UVDr.
B6: Under-voltage reset (UVDr).
B7: Normal operation – IGBT turn on and conducting current.
6
Rev. 10/05
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