SLUAAB9A March 2021 – December 2021 UCC25800-Q1
In gate driver applications, often the bias supply needs to provide both the positive voltage and the negative voltage to the gate driver circuit. The positive voltage is to ensure full enhancement of the switching devices. The negative voltage is to provide better noise immunity to prevent shoot through, or increases the turn-off speed for lower switching loss. The LLC circuit can easily create a single output voltage. Some simple circuits can be added to split the single output voltage into positive and negative voltages.