JAJSSU3A January 2024 – July 2024 LMG3100R017
PRODUCTION DATA
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The VCC bypass capacitor provides the gate charge for the low-side and high-side transistors and absorbs the reverse recovery charge of the bootstrap diode. The required bypass capacitance can be calculated with Equation 1.
QG is the individual and equal gate charge of the high-side and low-side GaN FETs. QRR is the reverse recovery charge of the bootstrap diode. ΔV is the maximum allowable voltage drop across the bypass capacitor. A 1-µF or larger value, good-quality, ceramic capacitor is recommended. Place the bypass capacitor as close as possible to the VCC and AGND pins of the device to minimize the parasitic inductance.