PS21961, PS21961-A, PS21961-C

Intellimod™ Module

Dual-In-Line Intelligent Power Module

3 Amperes/600 Volts

Powerex, Inc., 173 Pavilion Lane,Youngwood, Pennsylvania 15697-1800 (724) 925-7272

6

07/06

Protection Function Timing Diagrams

A1

A4

A5

A2

SC

A7

A3

SET

RESET

CR CIRCUIT TIME CONTAINS

DELAY (NOTE)

SC REFERENCE VOLTAGE

A6

A8

LOWER-ARMS

CONTROL INPUT

PROTECTION

CIRCUIT STATE

INTERNAL IGBT GATE

OUTPUT CURRENT IC

SENSE VOLTAGE OF

THE SHUNT RESISTOR

FAULT OUTPUT FO

Short-Circuit Protection (Lower-arms only with the external shunt resistor and RC filter)

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

Under-Voltage Protection (Lower-side, UVD)

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 of tFO(min) = 20µs.

A6: Input “L” – IGBT off.

A7: Input “H” – IGBT on is blocked during the FO output period.

A8: IGBT stays in off state.

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 output during under-voltage period, however, the minimum pulse width is 20µs.

B6: Under-voltage reset (UVDr).

B7: Normal operation – IGBT turn on and conducting current.