STEVAL-ISF002V1 STMicroelectronics, STEVAL-ISF002V1 Datasheet - Page 14

• Manufacturer Part Number: STEVAL-ISF002V1
• Description: BOARD EVALUATION
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISF002V1

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10422

STEVAL-ISF002V1 hardware description
3.3.6
14/62
Power MOSFET
The maximum current that can pass into the power MOSFET is given by
Equation 15
Equation 16
The selected power MOSFET is the STW23NM60N. Its R
25°C.
Considering a factor of 1.5 due to the temperature of 80°C, R
power rate is calculated as follows.
Equation 17
Equation 18
Now for the STW23NM60N:
Equation 19
Equation 20
Equation 21
Equation 22
Equation 23
P
I
MOSFET(swi
MOSFET(rms
P
MOSFET(tot
P
MOSFET(con
tching)
P
)
)
MOSFET(swi
=
=
V
P
duction)
in(pk)
=
MOSFET(con
P
out
⎡
⎢
⎣
80
min
tching)
=
⋅
Doc ID 16854 Rev 1
10
⋅
I
MOSFET(rms
P
3
2
duction)
MOSFET(swi
⋅
−
=
I
⎛
⎜
⎝
MOSFET(rms
15
16
f
sw
3
C
⋅
⋅
⋅
10
+
⋅
oss
V
⋅ π
t
⎛
⎜
⎝
)
r
P
in(pk)
2
t
−
V
r
MOSFET(swi
=
tching)
9
⋅
=
⋅
out
R
15
V
⋅
140
)
min
415
DS(on)
out
=
ns
. 5
=
=
⋅
pF
I
⋅
16
in(pk)
. 6
⎛
⎜
⎜
⎝
11
185
=
tching)
63
.
1400
A
(
38
. 5
+
W
⋅
16
+
DS(on)
1
2
=
2
2
2
⋅
1
(
C
⋅
7
DS(on)
⋅
⋅
. 0
140
oss
2 .
2
270
is 0.180 Ω for a T
+
−
⋅
V
⋅
. 6
16
10
= 0.270 Ω. Its maximum
)
out
63
3
W
−
⋅
2
⋅
12
185
)
⋅ π
≅
⎞
⎟
⎠
W
⋅
Equation 15
7
415
415
2 .
≅
⋅
14
W
2
2
⎞
⎟
⎠
⎞
⎟
⎟
⎠
W
⎤
⎥
⎦
A
W
case
UM0877
.
of