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JAN-03 PDF预览

JAN-03

更新时间: 2024-11-25 22:05:11
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威世 - VISHAY /
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描述
Basic Definitions

JAN-03 数据手册

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VISHAY  
Vishay Semiconductors  
Basic Definitions  
Basic Sinterglass Diode Parameters  
The major parameters for the selection of the appro- characteristic (t ), too. Additional parameters may be  
rr  
priate sinterglass diodes are the maximum reverse for example the reverse avalanche energy capability  
voltage (V  
), the average forward current (I  
)
(E ) and forward surge capability (I  
) etc.  
RRM  
FAV  
R
FSM  
and for switching application the reverse recovery  
V
V
V
Reverse voltage  
R
Repetitive peak reverse voltage, including all repeated reverse transient voltages  
Reverse breakdown voltage  
RRM  
(BR)R  
I
I
Reverse (leakage) current, at a specified reverse voltage V and temperature T  
R
R
J
Forward current  
F
V
Forward voltage drop, at a specified forward current I and temperature T  
F J  
F
I
Average forward output current, at a specified current waveform (normally 10ms/50Hz half-sine-  
wave, sometimes 8.3ms/60Hz half-sine-wave), a specified reverse voltage and a specified mounting  
condition (e.g. lead-length = 10mm or PCB mounted with certain pads and distance)  
FAV  
I
t
Peak forward surge current, with a specified current waveform (normally 10ms/50Hz half-sine-wave,  
sometimes 8.3ms/60Hz half-sine-wave),  
FSM  
Reverse recovery time, at a specified forward current (normally 0.5A), a specified reverse current  
(normally 1.0A) and specified measurement conditions (normally from 0 to 0.25A)  
rr  
E
Reverse avalanche energy, non-repetitive  
R
In the case of alternating voltages, once the voltage  
direction is selected it is maintained throughout. The  
alternating character of the quantity is given with the  
time dependent change in sign of its numerical values  
.
Polarity Conventions  
The voltage direction is given  
• by an arrow which points from the measuring point  
to the reference point  
or  
• by a two letter subscript, where the first letter is the  
measuring point and the second letter is the refer-  
ence point.  
A
I
1
B
A
I
2
= –I  
1
B
94 9316  
A
A
A
V
1
V
AB  
V =–V =V =–V  
2 1 BA AB  
Figure 2.  
The numerical value of the current is positive if the  
charge of the carriers moving in the direction of the  
arrow is positive (conventional current direction), or if  
the charge of the carriers moving against this direc-  
tion is negative. The numerical value of the current is  
negative if the charge of the carriers moving in the  
direction of the arrow is negative, or if the charge of  
the carriers moving against this direction is positive.  
The general rules stated above are also valid for alter-  
nating quantities. Once the direction is selected, it is  
maintained throughout. The alternating character of  
the quantity is given with the time-dependent change  
in sign of its numerical values.  
94 9315  
B
B
B
Figure 1.  
The numerical value of the voltage is positive if the  
potential at the arrow tail is higher than at the arrow  
head; i.e., the potential difference from the measuring  
point (A) to the reference point (B) is positive.  
The numerical value of the voltage is negative if the  
potential at the arrow head is higher than the tail; i.e.,  
the potential difference from the measuring point to  
the reference point is negative.  
Document Number 84067  
Rev. 7, 07-Jan-03  
www.vishay.com  
1

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