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參數(shù)資料
| 型號(hào)： | IRLU4343PBF |
| 元件分類(lèi)： | JFETs |
| 英文描述： | 26 A, 55 V, 0.05 ohm, N-CHANNEL, Si, POWER, MOSFET, TO-251AA |
| 封裝： | LEAD FREE, PLASTIC, IPAK-3 |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 302K |
| 代理商： | IRLU4343PBF |
www.irf.com
5
IRLR/U4343PbF & IRLU4343-701PbF
Fig 13. Maximum Avalanche Energy Vs. Drain Current
Fig 12. On-Resistance Vs. Gate Voltage
Fig 14. Typical Avalanche Current Vs.Pulsewidth
Fig 15. Maximum Avalanche Energy Vs. Temperature
Notes on Repetitive Avalanche Curves , Figures 14, 15:
(For further info, see AN-1005 at www.irf.com)
1. Avalanche failures assumption:
Purely a thermal phenomenon and failure occurs at a
temperature far in excess of Tjmax. This is validated for
every part type.
2. Safe operation in Avalanche is allowed as long asTjmax is
not exceeded.
3. Equation below based on circuit and waveforms shown in
Figures 17a, 17b.
4. PD (ave) = Average power dissipation per single
avalanche pulse.
5. BV = Rated breakdown voltage (1.3 factor accounts for
voltage increase during avalanche).
6. Iav = Allowable avalanche current.
7.
T = Allowable rise in junction temperature, not to exceed
Tjmax (assumed as 25°C in Figure 14, 15).
tav = Average time in avalanche.
D = Duty cycle in avalanche = tav f
ZthJC(D, tav) = Transient thermal resistance, see figure 11)
PD (ave) = 1/2 ( 1.3BVIav) =
DT/ ZthJC
Iav = 2DT/ [1.3BVZth]
EAS (AR) = PD (ave)tav
25
50
75
100
125
150
175
Starting TJ, Junction Temperature (°C)
0
100
200
300
400
500
600
700
E
A
S
,
S
in
g
le
P
u
ls
e
A
v
a
la
n
c
h
e
E
n
e
rg
y
(m
J
)
I D
TOP
2.4A
3.3A
BOTTOM
19A
2.0
4.0
6.0
8.0
10.0
VGS, Gate-to-Source Voltage (V)
0
50
100
150
200
R
D
S
(o
n
),
D
ra
in
-t
o
-S
o
u
rc
e
O
n
R
e
s
is
ta
n
c
e
(
m
)
TJ = 25°C
TJ = 125°C
ID = 19A
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
tav (sec)
0.1
1
10
100
1000
A
v
a
la
n
c
h
e
C
u
rr
e
n
t
(A
)
0.05
Duty Cycle = Single Pulse
0.10
Allowed avalanche Current vs
avalanche
pulsewidth,
tav
assuming
Tj = 25°C due to
avalanche losses. Note: In no
case should Tj be allowed to
exceed Tjmax
0.01
25
50
75
100
125
150
175
Starting TJ , Junction Temperature (°C)
0
20
40
60
80
100
120
140
160
180
E
A
R
,
A
v
a
la
n
c
h
e
E
n
e
rg
y
(m
J
)
TOP
Single Pulse
BOTTOM 1% Duty Cycle
ID = 19A
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