SKYPER32PROR_0701 Datasheet, PDF (12/18 Pages) Semikron International – IGBT Driver Core

SKYPER™ 32PRO R
Adjustment of Dead time / Neutralizing Locking Functions
Interlock time
[µs]
1
1,3
2
2,3
3
3,3
4*
4,3
no interlock
* Factory setting
PRIM_CFG_TDT1_IN
GND
GND
GND
GND
open
open
open
open
open
PRIM_CFG_TDT2_IN
GND
GND
open
open
GND
GND
open
open
open
PRIM_CDG_TDT3_IN
open
GND
open
GND
open
GND
open
GND
open
PRIM_CFG_SELECT_IN
open
open
open
open
open
open
open
open
GND
Please note:
The dead time has to be longer than the turn-off delay time of the IGBT in any case. This is to avoid that one IGBT
is turned on before the other one is not completely discharged. If the dead time is too short, the heat generated by
the short circuit current may destroy the module in the event of a short circuit in top or bottom arm.
The average output current is available at each output channel. It is not possible to interconnect the output
channels to achieve a higher average output current by neutralizing the locking function.
Dynamic Short Circuit Protection by VCEsat monitoring / de-saturation monitoring (DSCP)
The DSCP circuit is responsible for short circuit sensing. It monitors the collector-emitter voltage VCE of the IGBT during its
on-state. Due to the direct measurement of VCEsat on the IGBT's collector, the DSCP circuit switches off the IGBTs and an
error is indicated.
The reference voltage VCEref may dynamically be adapted to the IGBTs switching behaviour. Immediately after turn-on of the
IGBT, a higher value is effective than in steady state. This value will, however, be reset, when the IGBT is turned off. VCEstat
is the steady-state value of VCEref and is adjusted to the required maximum value for each IGBT by an external resistor RCE.
It may not exceed 10V. The time constant for the delay (exponential shape) of VCEref may be controlled by an external
capacitor CCE, which is connected in parallel to RCE. It controls the blanking time tbl which passes after turn-on of the IGBT
before the VCEsat monitoring is activated. This makes an adaptation to any IGBT switching behaviour possible.
Reference Voltage (VCEref) Characteristic
After tbl has passed, the VCE monitoring will be triggered as soon as VCEsat > VCEref and will turn off the IGBT. The error
memory will be set, and the output PRIM_HOLD_OUT changes to the HIGH state. Possible failure modes are shows in the
following pictures.
12
2007-01-19 – Rev03
© by SEMIKRON