Although quiescent V_DD current is very low, total supply current is higher, depending on the OUTA and OUTB current and the programmed oscillator frequency. The total V_DD current is the sum of quiescent V_DD current and the average OUT current. With the known operating frequency and the MOSFET gate charge (Q_g), use Equation 1 to calculate the average OUT current.

where

• f is frequency

For the best high-speed circuit performance, two V_DD bypass capacitors are recommended to prevent noise problems. The use of surface mount components is highly recommended. A 0.1-μF ceramic capacitor must be located closest to the V_DD to ground connection. In addition, a larger capacitor (such as 1-μF) with relatively low ESR must be connected in parallel, to help deliver the high current peaks to the load. The parallel combination of capacitors must present a low impedance characteristic for the expected current levels in the driver application