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SKYPER42R Datasheet(PDF) 10 Page - Semikron International |
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SKYPER42R Datasheet(HTML) 10 Page - Semikron International |
10 / 18 page SKYPER ® 42 R 9 2011-04-04 – Rev05 © by SEMIKRON 3.5. Power supply - Primary Requirements of the auxiliary power supply Regulated power supply +15V ±4% Maximum rise time of auxiliary power supply 150ms Power on reset completed after 56ms 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. Please note: Do not apply switching signals during power on reset. |
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