IXTP70N075T2 데이터 시트보기 (PDF) - IXYS CORPORATION

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IXTP70N075T2

DC to DC Synchronous Converter Design

IXYS CORPORATION 

DC to DC Synchronous Converter Design

Abdus Sattar, IXYS Corporation

IXAN0068

ISL6594D Specification:

Recommended devices for this application:

1. IXTA90N055T2

VDS = 55V, Id25=90A

Qg(on) = 42nC, Qgs = 14nC, Qgd = 8.5nC,

td(on) = 19nS, tr = 21nS, td(off) = 39nS, tf = 19nS.

Rds(on) = 8.4m Ω

Vgs(th) = 2-4V, gfs = 43

Ciss = 2670pF, Coss = 420pF, Crss = 100pF

Or,

1. IXTA110N055T2

Vds = 55V, Id25=110A

Qg(on) = 57nC, Qgs = 16nC, Qgd = 11nC,

td(on) = 18nS, tr = 25nS, td(off) = 40nS, tf = 23nS.

Rds(on) = 6.6m Ω , Vgs(th) = 2-4V, gfs = 49

Ciss = 3060pF, Coss = 497pF, Crss = 105pF

Analysis based on Above IXTA90N055T2:

QG(SW )

=

8.5nC

+ 14nC

2

= 15.5nC

The “point of voltage” is defined by, VSP

= VTH

+

IO

g fs

= 3 + 15 = 3.35V

43

The driver current is,

I = R V − V + R DRIVER(L−H )

DD

SP

DRIVER( PULL−UP )

Gate

= 10 − 3.35 = 6.65 = 1.33A

3+2

5

8

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