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CS4525 데이터시트(PDF) 97 Page - Cirrus Logic

부품명 CS4525
상세설명  30 W Digital Audio Amplifier with Integrated ADC
PDF  98 Pages
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제조업체  CIRRUS [Cirrus Logic]
홈페이지  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS4525 데이터시트(HTML) 97 Page - Cirrus Logic

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DS726PP1
97
CS4525
13.THERMAL CHARACTERISTICS
13.1 Thermal Flag
This device is designed to have the metal flag on the bottom of the device soldered directly to a metal plane
on the PCB. To enhance the thermal dissipation capabilities of the system, this metal plane should be cou-
pled with vias to a large metal plane on the backside (and inner ground layer, if applicable) of the PCB.
In either case, it is beneficial to use copper fill in any unused regions inside the PCB layout, especially those
immediately surrounding the CS4525. In addition to improving in electrical performance, this practice also
aids in heat dissipation.
The heat dissipation capability required of the metal plane for a given output power can be calculated as
follows:
θCA = [(TJ(MAX) - TA) / PD] - θJC
where,
θCA = Thermal resistance of the metal plane in °C/Watt
TJ(MAX) = Maximum rated operating junction temperature in °C, equal to 150 °C
TA = Ambient temperature in °C
PD = RMS power dissipation of the device, equal to 0.15*PRMS (assuming 85% efficiency)
θJC = Junction-to-case thermal resistance of the device in °C/Watt
14.ORDERING INFORMATION
Parameter
Symbol
Min
Typ
Max
Units
Junction to Case Thermal Impedance
θJC
-1
-
°C/Watt
Product
Description
Package Pb-Free
Grade
Temp Range Container
Order#
CS4525
Digital Audio Amp
with Integrated ADC
48-QFN
Yes
Commercial -10° to +70°C
Rail
CS4525-CNZ
Tape and
Reel
CS4525-CNZR
CRD4525-Q1
4 Layer / 1oz. Copper
Reference Design
Board
-
-
-
-
-
CRD4525-Q1
CRD4525-D1
2 Layer / 1oz. Copper
Reference Design
Board
-
-
-
-
-
CRD4525-D1



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