參數(shù)資料
型號: IRFR3710Z
廠商: International Rectifier
英文描述: Specifically designed for Automotive applications, this HEXFET Power MOSFET utilizes the latest processing techniques to achieve extremely low on-resi
中文描述: 專門為汽車應(yīng)用而設(shè)計(jì)的,這HEXFET功率MOSFET的采用最新的處理技術(shù),實(shí)現(xiàn)極低的性佝僂病
文件頁數(shù): 7/11頁
文件大?。?/td> 214K
代理商: IRFR3710Z
www.irf.com
7
Fig 15.
Typical Avalanche Current vs.Pulsewidth
Fig 16.
Maximum Avalanche Energy
vs. Temperature
Notes on Repetitive Avalanche Curves , Figures 15, 16:
(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 T
jmax
. This is validated for
every part type.
2. Safe operation in Avalanche is allowed as long asT
jmax
is
not exceeded.
3. Equation below based on circuit and waveforms shown in
Figures 12a, 12b.
4. P
D (ave)
= Average power dissipation per single
avalanche pulse.
5. BV = Rated breakdown voltage (1.3 factor accounts for
voltage increase during avalanche).
6. I
av
= Allowable avalanche current.
7.
T
=
Allowable rise in junction temperature, not to exceed
T
jmax
(assumed as 25°C in Figure 15, 16).
t
av =
Average time in avalanche.
D = Duty cycle in avalanche = t
av
·f
Z
thJC
(D, t
av
) = Transient thermal resistance, see figure 11)
P
D (ave)
= 1/2 ( 1.3·BV·I
av
) = T/ Z
thJC
I
av
=
2 T/ [1.3·BV·Z
th
]
E
AS (AR)
= P
D (ave)
·t
av
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
1.0E-01
tav (sec)
0.1
1
10
100
1000
A
0.05
Duty Cycle = Single Pulse
0.10
Allowed avalanche Current vs
avalanche
pulsewidth,
assuming
Tj = 25°C due to
avalanche losses
tav
0.01
25
50
75
100
125
150
175
Starting TJ , Junction Temperature (°C)
0
50
100
150
200
EA
TOP Single Pulse
BOTTOM 1% Duty Cycle
ID = 33A
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