SKIC6001 Datasheet, PDF (4/4 Pages) Semikron International – SEMIDRIVER IGBT Driver Circuit

SKIC 6001
RESET pulse which is generated, if the inputs (TOP,
BOTTOM) are LOW for 9 µs.
Functional description
Interlock
Fig. 3 demonstrates the right function of the interlock
of TOP-and BOTTOM-IGBT.
125 ns
Fig. 3 Interlock function
At first BOTTOM is turned off immediately after the
corresponding input signal (at 5µs), while TOP is
turned on with a delay of about 4µs (setting of
interlock 4µs). After 10µs both inputs become „on“.
This is not a correct state (both IGBT „on“ means
short circuit) and the reason is both outputs are
switched off. A switch on of BOTTOM is possible not
before TOP is „off“ (at 25µs, interlock and delay time
about 1µs).
Fig. 4 shows the behavior, if the interlock function
isn’t active (SELECT „low“). Both outputs react
immediately to the corresponding input (the
difference is the signal delay time of about 125 ns).
The interlock time may be chosen by connecting pin
TDT1 and TDT2 to GND (0) or 5V (1).
PIN
4µs
TDT1
1
TDT2
1
SEL
1
3µs 2µs
1
0
0
1
1
1
1µs OFF
0
X
0
X
1
0
125ns
Fig. 4 Interlock function not active
Shortpulse suppression
A very short pulse can be suppressed by limiting the
control input current. Thus with a 4.75kΩ resistance
shorter pulse than 70ns can be suppressed. This
gives a higher noise immunity.
DC-DC-Converter-Control signals
Fig. 5 output driver signals of the dc/dc converter.
The interlock time is 250ns, the frequency is 500kHz.
This technical information specifies devices but promises no characteristics. No warranty or guarantee
expressed or implied is made regarding delivery, performance or suitability.
 by SEMIKRON
000913
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