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參數(shù)資料
| 型號： | MTB15N06VT4 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | JFETs |
| 英文描述： | 15 A, 60 V, 0.12 ohm, N-CHANNEL, Si, POWER, MOSFET |
| 封裝： | CASE 418B-02, D2PAK-3 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大?。?/td> | 274K |
| 代理商： | MTB15N06VT4 |
MTB15N06V
http://onsemi.com
8
INFORMATION FOR USING THE D2PAK SURFACE MOUNT PACKAGE
RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a critical portion of the total
design. The footprint for the semiconductor packages must
be the correct size to ensure proper solder connection
interface between the board and the package. With the
correct pad geometry, the packages will self align when
subjected to a solder reflow process.
mm
inches
0.33
8.38
0.08
2.032
0.04
1.016
0.63
17.02
0.42
10.66
0.12
3.05
0.24
6.096
POWER DISSIPATION FOR A SURFACE MOUNT DEVICE
The power dissipation for a surface mount device is a
function of the drain pad size. These can vary from the
minimum pad size for soldering to a pad size given for
maximum power dissipation. Power dissipation for a surface
mount device is determined by TJ(max), the maximum rated
junction temperature of the die, RθJA, the thermal resistance
from the device junction to ambient, and the operating
temperature, TA. Using the values provided on the data
sheet, PD can be calculated as follows:
PD =
TJ(max) TA
RθJA
The values for the equation are found in the maximum
ratings table on the data sheet. Substituting these values into
the equation for an ambient temperature TA of 25°C, one can
calculate the power dissipation of the device. For a D2PAK
device, PD is calculated as follows.
PD = 175°C 25°C
50°C/W
= 3.0 Watts
The 50°C/W for the D2PAK package assumes the use of
the recommended footprint on a glass epoxy printed circuit
board to achieve a power dissipation of 3.0 Watts. There are
other alternatives to achieving higher power dissipation from
the surface mount packages. One is to increase the area of
the drain pad. By increasing the area of the drain pad, the
power dissipation can be increased. Although one can
almost double the power dissipation with this method, one
will be giving up area on the printed circuit board which can
defeat the purpose of using surface mount technology. For
example, a graph of RθJA versus drain pad area is shown in
Figure 16.
Figure 16. Thermal Resistance versus Drain Pad
Area for the D2PAK Package (Typical)
2.5 Watts
A, AREA (SQUARE INCHES)
Board Material = 0.0625″
G10/FR4, 2 oz Copper
TA = 25°C
60
70
50
40
30
20
16
14
12
10
8
6
4
2
0
3.5 Watts
5 Watts
TO
AMBIENT
(
C/W)°
R
JA
,THERMAL
RESIST
ANCE,
JUNCTION
θ
Another alternative would be to use a ceramic substrate or
an aluminum core board such as Thermal Clad. Using a
board material such as Thermal Clad, an aluminum core
board, the power dissipation can be doubled using the same
footprint.
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