AUIR3200S Datasheet, PDF (14/22 Pages) Infineon Technologies AG – MOSFET DRIVER WITH PROTECTION AND DIAGNOSTIC

AUIR3200S
IN frequency and duty cycle
The Vds protection is not active if the time ON is lower than Tblank on.
So the minimum time ON (ton) is ‘Tblank on max’ to be sure that this protection will be active.
The times OFF (toff) needs to be setup for assure that the capacitor bootstrap will be recharged up to 6V. The bootstrap
time charge depends of the bootstrap capacitor value and the inductance load value.
ton
IN
toff
6V
Vboot
Vds
MOSFET
Vdiag
Normal mode
0V
Vds
threshold
0V
Figure 12
If the capacitor is discharged at the turn ON of the MOSFET, the AUIR3200S will detect a fault (VDS protection) after
Tblank ON because the MOSFET won’t be fully ON.
IN
Vboot
Vds
MOSFET
Vdiag
Tblank On
Normal mode
VDS > VDS threshold
Tblank On
0V
VDS threshold
0V
Fault mode
14 Rev 1.1
Figure 13
2016-05-02