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| 型號(hào)： | UPRLED630 |
| 廠商： | MICROSEMI CORP-LOWELL |
| 元件分類： | LED |
| 英文描述： | SINGLE COLOR LED, BRIGHT RED, 1.4732 mm |
| 文件頁數(shù)： | 7/7頁 |
| 文件大?。?/td> | 240K |
| 代理商： | UPRLED630 |
Microsemi
580 Pleasant Street, Watertown, MA. 02472-2408, 617-926-0404, Fax: 617-924-1235
Page 7
Copyright
2002
Rev. 0.02, 2003-06-03
WWW
.Microse
m
i
.CO
M
UPRLED630
BRIGHT RED LED
PRODUCT PREVIEW
CALCULATION FOR SAFE OPERATION ABOVE 20 ma dc:
The power dissipation must be held at a level to maintain the junction below the maximum specified operating temperature.
Duty cycle control may be used to establish the safe operating condition using a train of pulses.
LED Junction temperature may be calculated by use of the following:
T J T Case V F I Dpk
.
t p Rθ JS
.
τ
1
t p
τ
Z
θτ t
p
.
Z
θτ Zθtp
.
T Case V F I Dpk
t p Rθ JS
τ
t p
τ
Z
θτ t
p
Z
θτ Zθtp
TCase is at a specified temperature. VF and IDpk values are read off graph of forward voltage vs drive current. tp and τ
are set by the on-time and pulse period of the drive circuit. Thermal Impedances (Z
θ) and Thermal resistance (Rθ)
values are read from Thermal Impedance graph.
UU
PP
RR
LL
EE
DD
6633
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