PS21993-4 Datasheet, PDF (8/10 Pages) Mitsubishi Electric Semiconductor – Dual-In-Line Package Intelligent Power Module TRANSFER-MOLD TYPE INSULATED TYPE

MITSUBISHI SEMICONDUCTOR <Dual-In-Line Package Intelligent Power Module>
PS21993-4/-4A/-4C/-4W
TRANSFER-MOLD TYPE
INSULATED TYPE
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.
a5. FO is output (tFO(min) = 20µs).
a6. Input “L”.
a7. Input “H”. But IGBT is still OFF state during outputting FO.
a8. IGBT turns ON when L→H signal is input after FO is reset.
N-side control
input
Protection circuit state
a6 a7
SET
RESET
Internal IGBT gate
Output current Ic
Sense voltage of the
shunt resistor
Fault output Fo
a3
a2
SC
a1
a4
a8
SC reference voltage
RC circuit time constant delay
a5
[B] Under-Voltage Protection (N-side, UVD)
b1. Control supply voltage VD rises : After VD level rises over under voltage reset level (UVDr), the circuits start to operate when next input
is applied.
b2. Normal operation : IGBT ON and carrying current.
b3. VD level dips to under voltage trip level. (UVDt).
b4. All N-side IGBTs turn OFF in spite of control input condition.
b5. FO is output. (tFO ≥ 20µs and FO outputs continuously during UV period).
b6. VD level rises over UVDr.
b7. Normal operation : IGBT ON and carrying current.
Control input
Protection circuit state
RESET
SET
UVDr
Control supply voltage VD
b1
UVDt
b3
Output current Ic
b2
b4
RESET
b6
b7
Error output Fo
b5
Sep. 2008
8