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參數(shù)資料
| 型號： | R500CH28E2H3 |
| 廠商： | WESTCODE SEMICONDUCTORS LTD |
| 元件分類： | 晶閘管 |
| 英文描述： | 4980 A, 2800 V, SCR |
| 封裝： | 101A281, 3 PIN |
| 文件頁數(shù)： | 9/13頁 |
| 文件大小： | 357K |
| 代理商： | R500CH28E2H3 |
WESTCODE Positive development in power electronics
R500CH20 to R500CH28
Provisional Data Sheet. Types R500CH20 to R500CH28 Issue 1
Page 5 of 13
January, 2000
The total dissipation is now given by:
f
E
W
(original)
(TOT)
+
=
12.2 Determination without Measurement
In circumstances where it is not possible to measure voltage and current conditions, or for design
purposes, the additional losses E in joules may be estimated as follows.
Let E be the value of energy per reverse cycle in joules (curves in Figure 9).
Let f be the operating frequency in Hz
()
(
)
()
f
R
E
T
th
original
SINK
new
SINK
=
where TSINK (new) is the required maximum heat sink temperature and
TSINK (original) is the heat sink temperature given with the frequency ratings.
A suitable R-C snubber network is connected across the thyristor to restrict the transient reverse voltage
waveform to a peak value (VRM) of 67% of the maximum grade. If a different grade is being used or VRM is
other than 67% of Grade, the reverse loss may be approximated by a pro rata adjustment of the maximum
value obtained from the curves.
NOTE 1- Reverse Recovery Loss by Measurement
This thyristor has a low reverse recovered charge and peak reverse recovery current. When measuring
the charge care must be taken to ensure that:
(a) a.c. coupled devices such as current transformers are not affected by prior passage of high
amplitude forward current.
(b) A suitable, polarised, clipping circuit must be connected to the input of the measuring oscilloscope
to avoid overloading the internal amplifiers by the relatively high amplitude forward current signal
(c) Measurement of reverse recovery waveform should be carried out with an appropriate critically
damped snubber, connected across diode anode to cathode. The formula used for the calculation
of this snubber is shown below:
dt
di
S
R
C
V
R
= 4
2
Where: VR = Commutating source voltage
CS = Snubber capacitance
R
= Snubber resistance
13.0 Gate Drive
The recommended pulse gate drive is 20V, 10
with a short-circuit current rise time of not more than
0.5s. This gate drive must be applied when using the full di/dt capability of the device.
The duration of pulse may need to be configured with respect to the application but should be no shorter
than 20s, otherwise an increase in pulse current could be needed to supply the resulting increase in
charge to trigger.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| R500L | 制造商:Mallory Sonalert Products Inc 功能描述:Res Wirewound POT 500 Ohm 10% 3W 1(Elec)/1(Mech)Turn 6.35mm (30.96 X 32.54mm) Solder Lug Panel Mount |
| R500M | 制造商:Omron Corporation 功能描述: |
| R500-PS-V | 制造商:Thomas & Betts 功能描述:NON-INS PRL SPLICE, 500 MCM, CMA 47 制造商:Thomas & Betts 功能描述:Splice Terminal 36.52mm 33.78mm Tin |
| R-500-W/FOAM ORG | 功能描述:存儲箱與外殼 DISC MFG 5/01 12.0X13.0X6.0 ORG RoHS:否 制造商:Tektronix 顏色:Black 材料:Polypropylene 尺寸:23.25 in L x 20.75 in W x 9 in H |
| R-500-W/FOAM-BLACK | 功能描述:存儲箱與外殼 DISC MFG 5/01 12.0X13.0X6.0 BLACK RoHS:否 制造商:Tektronix 顏色:Black 材料:Polypropylene 尺寸:23.25 in L x 20.75 in W x 9 in H |
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