SKYPER42R Datasheet, PDF (10/18 Pages) Semikron International – IGBT Driver Core

SKYPER^® 42 R
3.5. Power supply - Primary
Requirements of the auxiliary power supply
Regulated power supply
Maximum rise time of auxiliary power supply
Power on reset completed after
+15V ±4%
150ms
56ms
Please note:
Do not apply switching
signals during power on
reset.
The same power supply used for SKYPER 32 can be taken
The supplying switched mode power supply may not be turned-off for a short time as consequence of
its current limitation. Its output characteristic needs to be considered. Switched mode power supplies
with fold-back characteristic or hiccup-mode can create problems if no sufficient over current margin is
available. The voltage has to rise continuously.
If the power supply is able to provide a higher current, a peak current will flow in the first instant to
charge up the input capacitances on the driver. Its peak current value will be limited by the power
supply and the effective impedances (e.g. distribution lines), only.
The driver error signal PRIM_nERROR_OUT is operational after 56ms. Without any error present, the
error signal will be reset.
To assure a high level of system safety the TOP and BOT signal inputs should stay in a defined state
(OFF state, LOW) during driver turn-on time. Only after the end of the power-on-reset, IGBT switching
operation shall be permitted.
3.6. Gate driver signals – Primary
The signal transfer to each IGBT is made with pulse transformers, used for switching on and switching off of the
IGBT. The inputs have a Schmitt Trigger characteristic and a positive / active high logic (input HIGH = IGBT on;
input LOW = IGBT off).
It is mandatory to use circuits which switch active to +15V and 0V. Pull up and open collector output stages
must not be used for TOP / BOT control signals. It is recommended choosing the line drivers according to the
demanded length of the signal lines. The duty cycle of the driver can be adjusted between 0 – 100%. It is not
permitted to apply switching pulses shorter than 1µs.
TOP / BOT Input
A capacitor is connected to the input
to obtain high noise immunity. This
capacitor can cause for current
limited line drivers a little delay of few
ns, which can be neglected. The
capacitors have to be placed as
close as possible to the driver
interface.
9
2011-04-04 – Rev05
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