AUIR3330STRL View Datasheet(PDF) - International Rectifier
Part Name
Description
MFG CO.
'AUIR3330STRL' PDF : 30 Pages View PDF
AUIR3330S
The minimum off time is the time to charge the bootstrap capacitor (recover the value before turn on the
MOSFET) during the high duty cycle operation. In the high duty cycle value condition, due to the di/dt driver, the
internal gate continues to move whereas the output voltage doesn’t go down under 6v (from vbat). So the device
still need energy from the bootstrap capacitor but it can not charge it. When the bootstrap capacitor is discharged
the circuit goes in linear mode and it is stopped by the over power protection. To avoid this situation, the micro-
processor must turn fully on the device after the minimum off time is reached as it is describe in the Error!
Reference source not found.. The minimum off time is the minimum time to charge properly the bootstrap
capacitor.
15 www.irf.com © 2012 International Rectifier
May 29, 2014
Share Link: 
