HCNW3120 데이터 시트보기 (PDF) - Avago Technologies
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HCNW3120 Datasheet PDF : 24 Pages
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To minimize dead time in a given design, the turn on of
LED2 should be delayed (relative to the turn off of LED1)
so that under worst-case con-ditions, transistor Q1 has
just turned off when transistor Q2 turns on, as shown in
Figure 35. The amount of delay necessary to achieve this
conditions is equal to the maximum value of the propa-
gation delay difference specification, PDDMAX, which is
specified to be 350 ns over the operating temperature
range of ‑40°C to 100°C.
Delaying the LED signal by the maximum propagation
delay difference ensures that the minimum dead time is
zero, but it does not tell a designer what the maximum
dead time will be. The maximum dead time is equivalent
to the difference between the maximum and minimum
propagation delay difference specifications as shown in
Figure 36. The maximum dead time for the HCPL-3120 is
700 ns (= 350 ns - (-350 ns)) over an operating tempera-
ture range of -40°C to 100°C.
Note that the propagation delays used to calculate PDD
and dead time are taken at equal temperatures and test
conditions since the optocouplers under consideration
are typically mounted in close proximity to each other
and are switching identical IGBTs.
HCPL-3120 OPTION 060éHCPL-J312
800
PS (mW)
700
IS (mA) FOR HCPL-3120
OPTION 060
600
IS (mA) FOR HCPL-J312
500
400
300
200
100
0
0 25 50 75 100 125 150 175 200
TS – CASE TEMPERATURE – °C
1000
900
800
HCNW3120
PS (mW)
IS (mA)
700
600
500
400
300
200
100
0
0 25 50 75 100 125 150 175
TS – CASE TEMPERATURE – °C
Figure 37. Thermal derating curve, dependence of safety limiting value with case temperature per IEC/EN/DIN EN 60747-5-2.
HCPL-3120 fig 37a
HCPL-3120 fig 37b
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Data subject to change. Copyright © 2005-2008 Avago Technologies. All rights reserved. Obsoletes AV01-0622EN
AV02-0161EN - July 4, 2008
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