MIC4607 datasheet(17/42 Pages) MICROCHIP

部件名	MIC4607

功能描述	85V, Three-Phase MOSFET Driver with Adaptive Dead-Time, Anti-Shoot-Through and Overcurrent Protection

PDF	42 Pages

Scroll/Zoom	100%

制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

标志

17 / 42 page

 2016 Microchip Technology Inc.

DS20005610A-page 17

MIC4607

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 tHOOFF and when xHS < 2.2V, xLO goes

high with a delay of tLOON. Should xHS never trip the

aforementioned internal comparator reference (2.2V),

a falling xHI edge delayed by a typical 250 ns will set

“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 tLOOFF and delay

from xLO < 1.9V to xHO being on is tHOON.

FIGURE 4-2:

Separate Overlapping LI/HI Input Mode (MIC4607-1).

tLOOFF

tHOOFF

tLOON

tHOON

xHS

xHO

xLO

xHI

xLI

2.2V

(typ)

1.9V

(typ)

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