© by SEMIKRON / 2020-05-25 / Technical Explanation / SKYPER
®
12 PV
PROMGT.1026/ Rev.7/ Template Technical Explanation
Page 26/37
5.5
Dynamic short circuit protection by V
CEsat
-monitoring (DSCP)
The dynamic short circuit protection feature monitors the Collector-Emitter voltage V
CE
of the
semiconductor during on-state. When the feature is enabled and the voltage at the VCE_IN input exceeds
the voltage reference level at the CFG_VCE input the driver will enter into error state and will execute its
error routine as described in chapter 5.1.
The DSCP feature can be disabled by connecting the CFG_VCE pin to the PWR_VS_P pin and the VCE_IN
pin to the PWR_GND pin.
Important note
The DSCP feature is designed to detect short circuit conditions and forces the driver to react on the
desaturation event of a semiconductor. It is explicitly stated that this function is designed to detect short
circuit conditions and not to set a specific threshold to detect overcurrent situations e.g. of externally
connected applications. SEMIKRON recommends to set the DSCP trip level to a value of 7V to 9V (voltage
at the CFG_VCE pin) to prevent from unwanted accidently (false) triggered desaturation events due to a
too small gap between the saturation voltage of the IGBT and the trigger level of the DSCP feature.
Figure 18: SKYPER
12 PV | Recommended DSCP circuitry
SKYPER
®
12 PV
R
1
PWR_VS_P_TOP X100:03
CFG_VCE_TOP X100:01
VCE_IN_TOP X100:02
PWR_GND_TOP X100:08
TOP_ON X100:05
Error
C
1
R
VCE_TOP
D
VCE_TOP
DC+
T1
R
G(on)_TOP
R
2
R
2
_
C
FG
_
T
O
P
R
1
_
C
FG
_
T
O
P
C
C
FG
_
T
O
P
AC
TOP_ON
R
1
= 5kΩ
R
2
= 10kΩ
