MIC4609 datasheet(19/34 Pages) MICROCHIP

Part #	MIC4609

Description	600V 3-Phase MOSFET/IGBT Driver

PDF	34 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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19 / 34 page

 2016 Microchip Technology Inc.

DS20005531A-page 19

MIC4609

4.5

Dead Time and

Anti-Shoot-Through Protection

Shoot-through occurs when both the high and low-side

IGBTs/MOSFETs of a particular phase are ON at the

same time. The inputs of each phase use

anti-shoot-through circuitry to prevent this condition

from occurring. If both the HI and LI inputs of a phase

go high, both outputs (HO and LO) of that phase go low.

In addition to anti-shoot-through circuitry, a fixed

"dead-time" delay is added to the input-to-output

propagation delay. This allows the IGBTs/MOSFETs in

a particular phase to fully turn off before the other turns

on.

FIGURE 4-4:

Dead Time, Propagation Delay, and Rise/Fall-Time Diagram.

xLI

xLO

xHO

xHI

VIH

VIL

50%

10%

90%

tPW

10%

90%

50%

90%

tOFF

tON

10%

90%

MIC4609 Datasheet(PDF) 19 Page - Microchip Technology