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參數(shù)資料
| 型號： | MR2504 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | Medium-Current Silicon Rectifiers(中等電流整流器) |
| 中文描述： | 25 A, 400 V, SILICON, RECTIFIER DIODE |
| 封裝： | PLASTIC, 2 PIN |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 91K |
| 代理商： | MR2504 |
MR2502, MR2504, MR2510
http://onsemi.com
4
To determine maximum junction temperature of the diode in a
given situation, the following procedure is recommended:
The temperature of the case should be measured using a
thermocouple placed on the case at the temperature reference
point (see the outline drawing on page 1). The thermal mass
connected to the case is normally large enough so that it will not
significantly respond to heat surges generated in the diode as a
result of pulsed operation once steady–state conditions are
achieved. Using the measured value of T
C
, the junction
temperature may be determined by:
T
J
= T
C
+
where
T
JC
is the increase in junction temperature above the case
temperature, it may be determined by:
T
JC
= P
pk
R
θ
JC
[D + (1
D) r(t
1
+ t
p
) + r(t
p
)
r(t) = normalized value of transient thermal resistance at time, t,
from Figure 6, i.e.:
r (t
1
+ t
p
) = normalized value of transient thermal resistance at
time t
1
+ t
p.
DUTY CYCLE, D = t
p
/t
1
PEAK POWER, P
pk
, is peak of an
equivalent square power pulse.
T
JC
r(t
1
)] where
t
1
t
p
P
pk
P
pk
TIME
Figure 6. Thermal Response
Figure 7. Capacitance
Figure 8. Forward Recovery Time
Figure 9. Reverse Recovery Time
t, TIME (ms)
100
1.0
0.5
0.07
0.05
0.01
V
R
, REVERSE VOLTAGE (VOLTS)
1.0
0.1
500
300
200
100
70
50
2.0
1.0
I
F
, FORWARD CURRENT (AMP)
0.7
0.5
0.3
0.2
0.1
I
R
/I
F
, RATIO OF REVERSE TO FORWARD CURRENT
0.2
0.1
20
7.0
5.0
2.0
1.0
7.0
2.0
C
2.0
5.0
10
20
50
0.3
0.7
1.0
10
20
100
,
tf
5.0
3.0
1.0
0.3
0.5
10
3.0
tr
0.2
5.0
50
7.0
10
r
0.2
0.1
0.03
0.02
0.05 0.07 0.1
0.2
0.3
0.5 0.7
3.0
30
200
300
500
0.5
10
0.7 1.0
2.0
3.0
5.0
7.0
70
R
JC(t)
= R
JC
r(t)
NOTE 1
T
J
= 25
°
C
ALL DEVICES
ALL DEVICES EXCEPT MR2500
2.0 V
fr
= 1.0 V
T
J
= 25
°
C
T
J
= 25
°
C
I
F
= 10 A
5.0 A
1.0 A
fr
f
t
fr
I
F
0
I
R
0.25 I
R
t
rr
(
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