IXAN0069 Datasheet, PDF (1/11 Pages) IXYS Corporation – DC to DC Synchronous Converter Design

DC to DC Synchronous Converter Design
Abdus Sattar, IXYS Corporation
IXAN0068
Modern power electronics products require small size and lighter weight of power
electronics parts. Filter inductor and capacitor sizes must be small. With the small filter,
the switching semiconductor devices must have small switching loss. And heat sink also
must be reduced. For the safe operation with the small heat sink, the switching
semiconductor devices must have small conduction loss. IXYS developed new generation
of Trench MOSFET (Trench2^TM), which has small gate charge and low on-resistance.
The MOSFET will be well suited for high power applications of synchronous DC to DC
converters used in various systems. The MOSFET is rugged and has avalanche energy
capability.
Table 1: Few Examples of IXYS TrenchT2^TM N-Channel Power MOSFETs
Part Number
Vdss Id @ Rds(on) Ciss Qg trr @ R(th)JC Pd
(max) Tc=25C
@
(pF) (nC Tj= (°C/W) (W)
(V)
(A) Tj=25°C
) 25°C
(Ω)
(ns)
IXTA220N04T2
40
220 0.0035 6500 112
45
0.42 360
IXTP220N04T2
40
220 0.0035 6500 112
45
0.42 360
IXTA90N055T2
55
90 0.0084 2670 42 37
1.0 150
IXTP90N055T2
55
90 0.0084 2670 42 37
1.0 150
IXTA110N055T2
55
110 0.0066 3060 57
38
0.82 180
IXTP110N055T2
55
110 0.0066 3060 57
38
0.82 180
IXTA200N055T2
55
200 0.0042 6800 109
49
0.42 360
IXTP200N055T2
55
200 0.0042 6800 109
49
0.42 360
IXTA70N075T2
75
70 0.012 2580 46 48
1.0 150
IXTP70N075T2
75
70 0.012 2580 46 48
1.0 150
IXTA90N075T2
75
90 0.010 3100 54
50
0.82 180
IXTP90N075T2
75
90 0.010 3100 54
50
0.82 180
E_AS
(mJ)
600
600
300
300
400
400
600
600
300
300
400
400
Package
Type
TO‐263
TO‐220
TO‐263
TO‐220
TO‐263
TO‐220
TO‐263
TO‐220
TO‐263
TO‐220
TO‐263
TO‐220
DC-to-DC Synchronous Converter Design:
Figure 1: Synchronous Buck Converter using IXYS TrenchT2^TM Power MOSFET
1