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參數(shù)資料
| 型號(hào)： | AN-53 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Implementing an RC5051 DC-DC Converter on Pentium II Motherboards |
| 中文描述： | 推行RC5051的DC - DC轉(zhuǎn)換器的奔騰II主板 |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 143K |
| 代理商： | AN-53 |
APPLICATION NOTE
AN53
7
MOSFET Selection Cosiderations
MOSFET Selection
This application requires N-channel Logic Level Enhance-
ment Mode Field Effect Transistors. Desired characteristics
are as follows:
Low Static Drain-Source On-Resistance,
R
DS,ON
< 40 m
W
(lower is better)
Low gate drive voltage, V
GS
￡
4.5V
Power package with low Thermal Resistance
Drain current rating of 20A minimum
Drain-Source voltage > 15V.
The on-resistance (R
DS,ON
) is the primary parameter for
MOSFET selection. It determines the power dissipation
within the MOSFET and, therefore, significantly affects the
efficiency of the DC-DC converter. Table 6 is a selection
table for MOSFETs.
Table 6. MOSFET Selection Table
Manufacturer
and Part #
Fairchild
FDP6030L
Fairchild
FDB6030L
Fairchild
FDP603AL
Fairchild
FDB603AL
Fairchild
FDP7030L
Fairchild
FDB7030L
IR
IRL2203N
IR
IRL2203S
Conditions
R
DS, ON
(m
W
)
Typ.
15
Package
TO-220
Thermal
Resistance (
°
C/W)
Q
JA
= 62.5
Max.
20
V
GS
= 4.5V, I
D
= 21A
T
J
= 25
°
C
V
GS
= 4.5V, I
D
= 21A
T
J
= 25
°
C
15
20
D
2
-PAK
Q
JA
= 62.5
V
GS
= 4.5V, I
D
= 10A
T
J
= 25
°
C
30
36
TO-220
Q
JA
= 62.5
V
GS
= 4.5V, I
D
= 10A
T
J
= 25
°
C
30
36
D
2
-PAK
Q
JA
= 62.5
V
GS
= 5V, I
D
= 40A
T
J
= 25
°
C
9
10
TO-220
Q
JA
= 62.5
V
GS
= 5V, I
D
= 40A
T
J
= 25
°
C
9
10
D
2
-PAK
Q
JA
= 62.5
V
GS
= 4.5V, I
D
= 50A
T
J
= 25
°
C
10
TO-220
Q
JA
= 62
V
GS
= 4.5V, I
D
= 50A
T
J
= 25
°
C
10
D
2
-PAK0
Q
JA
= 40
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