ACPL-331J-500E Avago Technologies US Inc., ACPL-331J-500E Datasheet - Page 22

• Manufacturer Part Number: ACPL-331J-500E
• Description: Amplifier-Output Optocoupler,2-CHANNEL,3.75kV ISOLATION,SO
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-331J-500E

• Voltage - Isolation: 3750Vrms
• Number Of Channels: 2, Bi-Directional
• Current - Output / Channel: 1.5A
• Propagation Delay High - Low @ If: 180ns @ 10mA
• Current - Dc Forward (if): 12mA
• Input Type: DC
• Output Type: Gate Driver, Miller Clamp
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Thermal Model
The ACPL-331J is designed to dissipate the majority of
the heat through pins 1, 4, 5 & 8 for the input IC and pins
9 & 12 for the output IC. (There are two V
output side, pins 9 and 12, for this purpose.) Heat flow
through other pins or through the package directly into
ambient are considered negligible and not modeled
here.
In order to achieve the power dissipation specified in
the absolute maximum specification, it is imperative
that pins 5, 9, and 12 have ground planes connected to
them. As long as the maximum power specification is
not exceeded, the only other limitation to the amount
of power one can dissipate is the absolute maximum
junction temperature specification of 125°C. The junction
temperatures can be calculated with the following
equations:
T
T
Figure 39. ACPL-331J Thermal Model
Related Application Notes
AN5314 – Active Miller Clamp
AN5324 - Desaturation Fault Detection
AN5315 – “Soft” Turn-off Feature
AN1043 – Common-Mode Noise : Sources and Solutions
AN02-0310EN - Plastics Optocoupler Product ESD and Moisture Sensitivity
For product information and a complete list of distributors, please go to our web site:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies in the United States and other countries.
Data subject to change. Copyright © 2005-2011 Avago Technologies. All rights reserved.
AV02-0119EN - March 24, 2011
ji
jo
= P
= Po (θ
i
(θ
i5
o9,12
+ θ
5A
+ θ
) + T
9,12A
A
) + T
A
EE
pins on the
Tji = junction temperature of input side IC
Tjo = junction temperature of output side IC
TP5 = pin 5 temperature at package edge
TP9,12 = pin 9 and 12 temperature at package edge
θI5 = input side IC to pin 5 thermal resistance
θo9,12 = output side IC to pin 9 and 12 thermal resistance
θ5A = pin 5 to ambient thermal resistance
θ9,12A = pin 9 and 12 to ambient thermal resistance
*The θ5A and θ9,12A values shown here are for PCB layouts with reasonable air flow.
This value may increase or decrease by a factor of 2 depending on PCB layout and/or airflow.
www.avagotech.com
where P
output IC. Since θ
layout and airflow, their exact number may not be
available. Therefore, a more accurate method of calcu-
lating the junction temperature is with the following
equations:
T
T
These equations, however, require that the pin 5 and pins
9, 12 temperatures be measured with a thermal couple
on the pin at the ACPL-331J package edge.
If the calculated junction temperatures for the thermal
model in Figure 39 is higher than 125°C, the pin tem-
perature for pins 9 and 12 should be measured (at the
package edge) under worst case operating environment
for a more accurate estimate of the junction tempera-
tures.
ji
jo
= P
= P
i
o
θ
θ
i5
i
o9,12
+ T
= power into input IC and P
P5
+ T
P9,12
5A
and θ
9,12A
are dependent on PCB
o
= power into