C&H Technology PS21765 - Manual (Page 6)

PS21765
Intellimod™ Module
Dual-In-Line Intelligent Power Module
20 Amperes/600 Volts
Powerex, Inc., 173 Pavilion Lane, Youngwood, Pennsylvania 15697 (724) 925-7272
 Rev. 07/07
Short Circuit Protection (Lower-arms Only with External Shunt Resistor and RC Filter)
A1
SC
SC REFERENCE VOLTAGE
CR CIRCUIT TIME CONSTANT DELAY
A2
A3
A4
A8
A5
A7 A6
SET RESET
LOWER-ARMS
CONTROL INPUT
PROTECTION
CIRCUIT STATE
INTERNAL IGBT GATE
SENSE VOLTAGE OF
THE SHUNT RESISTOR
OUTPUT CURRENT IC
FAULT OUTPUT FO
A. Short Circuit Protection (Lower-arms Only with External Shunt Resistor and RC Filter)
A1: Normal operation – IGBT ON and carrying current.
A2: Short Circuit current detection (SC trigger).
A3: IGBT gate hard interruption.
A4: IGBT turns OFF.
A5: FO timer operation starts. The pulse width of the FO signal is set by the external capacitor CFO.
A6: Input "L" – IGBT OFF.
A7: Input "H"
A8: IGBT OFF state in spite of input "H".
B1
B4
B5
B2
UVDt
B7
B3
SET
RESET RESET
UVDr
B6
CONTROL INPUT
PROTECTION
CIRCUIT STATE
CONTROL SUPPLY
VOLTAGE VD
OUTPUT CURRENT IC
FAULT OUTPUT FO
B. Under-Voltage Protection (Lower-arm, UVD)
B1: Control supply voltage risinge – 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 ON and conducting current.
B3: Under-voltage trip (UVDt).
B4: IGBT turns OFF regardless of the control input level.
B5: FO operation starts.
B6: Under-voltage reset (UVDr).
B7: Normal operation – IGBT ON and conducting current.
Under-Voltage Protection (Lower-arm, UV
D
)