FOD8333 데이터 시트보기 (PDF) - Fairchild Semiconductor

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FOD8333

Input LED Drive, 2.5 A Output Current, IGBT Drive Optocoupler with Desaturation Detection, Isolated Fault Sensing, Active Miller Clamp, and Automatic Fault Reset

Fairchild Semiconductor 

11. Increasing the Output Drive Current Using an

External Booster Stage

If larger gate drive capability is needed for large IGBT

modules or parallel operation, an output booster stage

may be added to driver for optimum performance.

A possible implementation is by a discrete NPN/PNP

totem-pole configuration. These booster transistors

should be fast switching and have sufficient current gain

to deliver the desired peak output current.

FOD8333

VE 16

VLED2+ 15

DESAT 14

VDD 13

VSS 12

VO 11

VCLAMP 10

VSS 9

0.1µF

0.1µF

CBLANK

DDESAT

100Ω

RG

–

+

Figure 58. Output Booster Stage for Increased Output Drive Current

©2014 Fairchild Semiconductor Corporation

FOD8333 Rev. 1.0.3

29

www.fairchildsemi.com

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