SI82390AD-IS Datasheet, PDF (13/38 Pages) Silicon Laboratories – 4.0 A ISODrivers with 2.5 V VDDI and Safety Features

Si8239x Data Sheet
System Overview
2.7 Programmable Dead Time and Overlap Protection
All high-side/low-side drivers (Si82394/8) include programmable dead time, which adds a user-programmable delay between transitions
of VOA and VOB. When enabled, dead time is present on all transitions. The amount of dead time delay (DT) is programmed by a
single resistor (RDT) connected from the DT input to ground per the equation below. Note that the dead time pin should be connected
to GND1 through a resistor between the values of 6 kΩ and 100 kΩ and a filter capacitor of 100 pF in parallel as shown in Figure
3.1 Si82394/8 in Half-Bridge Application on page 13. It is highly recommended it not be tied to VDDI. See Figure 2.18 Dead Time
Waveforms for High-Side/Low-Side Drivers on page 12 below.
Figure 2.18. Dead Time Waveforms for High-Side/Low-Side Drivers
2.8 De-glitch Feature
A de-glitch feature is provided on some options, as defined in the Ordering Guide. The de-glitch basically provides an internal time de-
lay during which any noise is ignored and will not pass through the IC. It is about 30 ns; so, for these product options, the prop delay will
be extended by 30 ns.
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