Datasheet

Figure 37. Thermal derating curve, dependence of safety limiting value with case temperature per IEC/EN/DIN EN 60747-5-2.
OUTPUT POWER – P
S
, INPUT CURRENT – I
S
0
0
T
S
– CASE TEMPERATURE – °C
175
HCPL-3120 fig 37b
1000
50
400
12525 75 100 150
600
800
200
100
300
500
700
900
HCNW3120
P
S
(mW)
I
S
(mA)
OUTPUT POWER – P
S
, INPUT CURRENT – I
S
0
0
T
S
– CASE TEMPERATURE – °C
200
600
400
25
HCPL-3120 fig 37a
800
50 75 100
200
150 175
P
S
(mW)
125
100
300
500
700
I
S
(mA) FOR HCPL-3120
OPTION 060
I
S
(mA) FOR HCPL-J312
HCPL-3120 OPTION 060éHCPL-J312
To minimize dead time in a given design, the turn on of
LED2 should be delayed (relative to the turn o of LED1)
so that under worst-case con-ditions, transistor Q1 has
just turned o 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 dierence specication, PDD
MAX
, which is
specied to be 350 ns over the operating temperature
range of -40°C to 100°C.
Delaying the LED signal by the maximum propagation
delay dierence 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 dierence between the maximum and minimum
propagation delay dierence specications 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.
For product information and a complete list of distributors, please go to our website: www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2008 Avago Technologies. All rights reserved. Obsoletes AV01-0622EN
AV02-0161EN - July 4, 2008