3 Gate Drive Critical Loops

As explained earlier, gate drivers need to be placed as close as possible to the switching power devices, such as MOSFETs, for optimum performance. These switching power devices are generally operated at significantly higher temperature than ambient, and often close to their limits, such as 140C. Therefore, the gate driver must also be capable of operating at these higher ambient operating temperatures.

Lower ON resistance of the output stage and the thermal pad of the UCC27614 help it achieve wide thermal operation window of -40C to 150C . The UCC27614 not only provides great switching performance at very high switching frequencies, such as 6MHz, but also stays well within the recommended junction temperature range as shown in Figure 3-1.