EK61 Cirrus Logic Inc, EK61 Datasheet - Page 10

• Manufacturer Part Number: EK61
• Description: KIT EVALUATION PA78/PA79
• Manufacturer: Cirrus Logic Inc
• Series: Apex Precision Power™r

Specifications of EK61

• Channels Per Ic: 1 - Single, 2 - Dual
• Amplifier Type: Power
• Output Type: Single-Ended
• Board Type: Bare (Unpopulated)
• Utilized Ic / Part: PA78DK, PA79DK
• Product: Amplifier Modules
• Description/function: Audio Amplifiers
• For Use With/related Products: PA78DK, PA79DK
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Operating Temperature: -
• Current - Output / Channel: -
• Voltage - Supply, Single/dual (±): -
• -3db Bandwidth: -
• Slew Rate: -
• Current - Supply (main Ic): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1398; EK61

PA78
LAYOUT CONSIDERATIONS
The PA78 is built on a dielectrically isolated process and the package tab is therefore not electrically connected
to the amplifier. For high speed operation, the package tab should be connected to a stable reference to reduce
capacitive coupling between amplifier nodes and the floating tab. It is often convenient to directly connect the tab
to GND or one of the supply rails, but an AC connection through a 1µF capacitor to GND is also sufficient if a DC
connection is undesirable
Care should be taken to position the R
loops in these paths pick up noise and increase the likelihood of LC interactions and oscillations.
The PA78DK package has a large exposed integrated copper heatslug to which the monolithic amplifier is directly
attached. The solder connection of the heat slug to a 1 square inch foil area on the printed circuit board will result
in improved thermal performance of 25ºC/W. In order to improve the thermal performance, multiple metal layers in
the printed circuit board are recommended. This may be adequate heatsinking but the large number of variables
involved suggest temperature measurements be made on the top of the package. Do not allow the temperature to
exceed 85ºC.
The junction to ambient thermal resistance of the DK package can achieve a 19.1ºC/W rating by using the PCB
conditions outlined in JEDEC standard: (JESD51–5):
ELECTROSTATIC DISChARGE
Like many high performance MOSFET amplifiers, the PA78 very sensitive to damage due to electrostatic discharge
(ESD). Failure to follow proper ESD handling procedures could have results ranging from reduced operating per-
formance to catastrophic damage. Minimum proper handling includes the use of grounded wrist or shoe straps,
grounded work surfaces. Ionizers directed at the work in progress can neutralize the charge build up in the work
environment and are strongly recommended.
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 [e-mail].
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-
TOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
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
LIABILITY, INCLUDING ATTORNEYS’ FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.
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.
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PCB Conditions:
Conditions:
PCB Layers = 4L, Copper, FR–4
PCB Dimensions = 101.6 x 114.3mm
PCB Thickness = 1.6mm
Power dissipation = 2 watt
Ambient Temperature = 55ºC
C
/ C
C
compensation networks close to the amplifier compensation pins. Long
P r o d u c t I n n o v a t i o n F r o m
PA78U