Although quiescent V_DD current is very low, total supply current is higher, depending on OUTA and OUTB current and the programmed oscillator frequency. Total V_DD current is the sum of quiescent V_DD current and the average OUT current. Knowing the operating frequency and the MOSFET gate charge (Q_g), average OUT current can be calculated from Equation 1.

where

• f is frequency

For the best high-speed circuit performance, TI recommends two V_DD bypass capacitors to prevent noise problems. TI highly recommends using surface-mount components. 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.