MIC4607 Datasheet, PDF (17/42 Pages) Microchip Technology – 85V, Three-Phase MOSFET Driver with Adaptive Dead-Time, Anti-Shoot-Through and Overcurrent Protection

4.2 Overlapping LI/HI Input Mode
(MIC4607-1)
When xLI/xHI input high signals overlap, xLO/xHO out-
put states are determined by the first output to be
turned on. That is, if xLI goes high (ON), while xHO is
high, xHO stays high until xHI goes low at which point,
after a delay of t_HOOFF and when xHS < 2.2V, xLO goes
high with a delay of t_LOON. Should xHS never trip the
aforementioned internal comparator reference (2.2V),
a falling xHI edge delayed by a typical 250 ns will set
MIC4607
“HS latch” allowing xLO to go high.
If xHS falls very fast, xLO will be held low by a 35 ns
delay gated by HI going low. Conversely, xHI going
high (ON) when xLO is high has no effect on outputs
until xLI is pulled low (off) and xLO falls to < 1.9V. Delay
from xLI going low to xLO falling is t_LOOFF and delay
from xLO < 1.9V to xHO being on is t_HOON.
2.2V
xHS
(typ)
0V
t_LOON
xHO
xLO
t_HOOFF
t_HOON
1.9V
(typ)
t_LOOFF
xHI
xLI
FIGURE 4-2:
Separate Overlapping LI/HI Input Mode (MIC4607-1).
 2016 Microchip Technology Inc.
DS20005610A-page 17