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参数资料
| 型号： | MR760 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 参考电压二极管 |
| 英文描述： | HIGH CURRENT LEAD MOUNTED SILICON RECTIFIERS 50-1000 VOLTS DIFFUSED JUNCTION |
| 中文描述： | 6 A, 1000 V, SILICON, RECTIFIER DIODE |
| 文件页数： | 4/6页 |
| 文件大小： | 188K |
| 代理商： | MR760 |
4
Rectifier Device Data
Figure 9. Rectification Efficiency
Figure 10. Reverse Recovery Time
REPETITION FREQUENCY (kHz)
2.0
1.0
100
50
30
20
70
3.0
5.0
100
R
70
7.0
10
20
30
50
TJ = 25
°
C
CURRENT INPUT WAVEFORM
IR/IF, RATIO OF REVERSE TO FORWARD CURRENT
0.2
0.1
20
7.0
5.0
2.0
1.0
7.0
0.3
0.5
10
3.0
t
10
0.7 1.0
2.0
3.0
5.0
TJ = 25
°
C
IF = 5 A
3 A
1 A
IF
0
IR
trr
Figure 11. Junction Capacitance
Figure 12. Forward Recovery Time
VR, REVERSE VOLTAGE (VOLTS)
1.0
3.0
500
300
200
100
70
50
2.0
C
10
20
100
7.0
5.0
50
30
TJ = 25
°
C
1.0
IF, FORWARD PULSE CURRENT (AMP)
0.7
0.5
0.3
0.2
0.1
2.0
,
t
5.0
3.0
1.0
7.0
10
fr = 1.0 V
TJ = 25
°
C
fr
f
tfr
TJ = 175
°
C
30
700
1000
30
20
10
70
fr = 2.0 V
RS
RL
VO
Figure 13. Single–Phase Half–Wave
Rectifier Circuit
The rectification efficiency factor
σ
shown in Figure 9 was
calculated using the formula:
σ
P
(dc)
P
(rms)
V
2
o
(dc)
R
L
V
2
o
(rms)
R
L
.100%
V
2
o
(dc)
V
2
o
(
ac)
V
2
o
(dc)
.100%
(1)
For a sine wave input Vm sin (wt) to the diode, assumed
lossless, the maximum theoretical efficiency factor becomes:
σ
(sine)
V
2m
2
R
L
V
2m
4R
L
.100%
4
π
2
.100%
40.6%
(2)
For a square wave input of amplitude Vm, the efficiency
factor becomes:
σ
(square)
V
2m
2
R
L
V
2m
R
L
.100%
50%
(3)
(A full wave circuit has twice these efficiencies)
As the frequency of the input signal is increased, the re-
verse recovery time of the diode (Figure 10) becomes signifi-
cant, resulting in an increasing ac voltage component across
RL which is opposite in polarity to the forward current, there-
by reducing the value of the efficiency factor
σ
, as shown on
Figure 9.
It should be emphasized that Figure 9 shows waveform ef-
ficiency only; it does not provide a measure of diode losses.
Data was obtained by measuring the ac component of Vo
with a true rms ac voltmeter and the dc component with a dc
voltmeter. The data was used in Equation 1 to obtain points
for Figure 9.
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