PA162
THERMAL CONSIDERATIONS
Product Innovation From
50
The PA162DK has a large exposed integrated copper heat-
(A
+B
slug to which the monolithic is directly attached. The solder
+C
+D
connection of the heatslug to a minimum of 1 square inch
)A
(A+
40
MP
B+
C)
LIF
foil area of the printed circuit board will result in thermal per-
AM
IE
PL
RS
formance of 25°C/W junction to air rating of the PA162DK.
IFI
LO
ER
30
A
SL
Solder connection to an area of 1 to 2 square inches of foil
OA
DED
(A+
DE
B) A
is required for minimal power applications.
D
MP
LIF
IER
Where the PA162DK is used in higher power applications, it
20
SL
OA
(A) A
DED
is necessary to use surface mount techniques of heatsink-
MPLI
FIER
LOAD
ing. Surface mount techniques include the use of a surface
ED
10
mount fan in combination with a surface mount heatsink on
the backside of the FR4/ PC board with through hole ther-
mal vias. Other highly thermal conductive substrate board
0
125
25
75
100
0
50
materials are available for maximum heat sinking.
JUNCTION TEMPERATURE, T
J
(°C)
The Power Derating graph assumes that the power dissipa-
tion is equal in each of the amplifiers. Power and thermal
ratings are based on two separate dual monolithic power op amps on one integrated copper heat slug. Amps A and
B are combined on one monolithic die while amps C and D are combined on the other. This multi chip configura-
tion provides superior thermal performance by isolating each of the dual amplifiers. When loading either of the dual
amplifiers it is possible to achieve better thermal performance by loading any combination of amplifiers (A or B) +
(C or D).
POWER DERATING
MOUNTING PRECAUTIONS
1. Always use a heat sink. Even unloaded the PA162DK can dissipate up to .8 watts.
2. Avoid bending the leads. Such action can lead to internal damage.
CONTACTING CIRRUS LOGIC SUPPORT
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact apex.support@cirrus.com.
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-
sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-
ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PROD-
UCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUS-
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MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE
CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES,
BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL
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Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.
6
INTERNAL POWER DISSIPATION, P (W)
PA162U
APEX [ CIRRUS LOGIC ]
