MITSUBISHI SEMICONDUCTOR <Dual-In-Line Package Intelligent Power Module>

PS21993-4E/-4AE/-4CE/-4EW

TRANSFER-MOLD TYPE

INSULATED TYPE

Sep. 2008

8

Error output Fo

Output current Ic

Protection circuit state

Control input

b1

b2

b3

b5

RESET

RESET

SET

b6

b4

b7

Protection circuit state

N-side control

input

Fault output Fo

Sense voltage of the

shunt resistor

Output current Ic

Internal IGBT gate

SC referenc e voltage

RC circuit time constant delay

a5

a8

a4

a3

a1

a2

SC

RESET

SET

a7

a6

Fig. 8 TIMING CHART OF THE PROTECTIVE FUNCTIONS

[A] Short-Circuit Protection (N-side only with the external shunt resistor and RC filter)

a1. Normal operation : IGBT ON and carrying current.

a2. Short circuit is detected (SC trigger).

a3. All N-side IGBTs’ gates are hard interrupted.

a4. All N-side IGBTs turn OFF.

µs).

a6. Input “L”.

a8. IGBT turns ON when L

is applied.

b2. Normal operation : IGBT ON and carrying current.

b4. All N-side IGBTs turn OFF in spite of control input condition.

b7. Normal operation : IGBT ON and carrying current.