ZHCSAO4F December 2012 – March 2018 UCC27611
PRODUCTION DATA.
The UCC27611 device features very low quiescent IDD current. The total supply current is the sum of the quiescent IDD current, the average IOUT current due to switching, and finally any current related to pullup resistors on the unused input pin. For example, when the inverting input pin is pulled low, additional current is drawn from VDD supply through the pullup resistors (see Functional Block Diagram). Knowing the operating frequency (fSW) and the MOSFET gate (QG) charge at the drive voltage being used, the average IOUT current can be calculated as product of QG and fSW.