CS4525-CNZR Cirrus Logic Inc, CS4525-CNZR Datasheet - Page 97

• Manufacturer Part Number: CS4525-CNZR
• Description: IC PWM Controller+power Stage
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r
• Type: Class Dr

Specifications of CS4525-CNZR

• Output Type: 2-Channel (Stereo) or 4-Channel (Quad)
• Max Output Power X Channels @ Load: 30W x 1 @ 4 Ohm; 15W x 2 @ 8 Ohm
• Voltage - Supply: 8 V ~ 18 V
• Features: ADC, Depop, I²C, I²S, Mute, PWM, Short-Circuit and Thermal Protection, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 48-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1586 - REFERENCE BOARD FOR CS4525 PWM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS726PP3
13.THERMAL CHARACTERISTICS
13.1
14.ORDERING INFORMATION
Junction to Case Thermal Impedance
CRD4525-Q1
CRD4525-D1
Product
CS4525
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:
θ
where,
θ
T
T
P
θ
CA
CA
JC
J(MAX)
A
D
= Ambient temperature in °C
= RMS power dissipation of the device, equal to 0.176*P
= Junction-to-case thermal resistance of the device in °C/Watt
= [(T
= Thermal resistance of the metal plane in °C/Watt
= Maximum rated operating junction temperature in °C, equal to 150 °C
4 Layer / 1oz. Copper
2 Layer / 1oz. Copper
J(MAX)
with Integrated ADC
Reference Design
Reference Design
Digital Audio Amp
Description
Board
Board
- T
A
Parameter
) / P
D
] - θ
JC
Package
48-QFN
-
-
Pb-Free
Yes
-
-
Commercial
Grade
-
-
Symbol
RMS-OUT
θ
JC
Temp Range Container
0° to +70°C
-
-
(assuming 85% efficiency)
Min
-
Tape and
Typ
Reel
Rail
1
-
-
Max
CS4525-CNZR
-
CS4525-CNZ
CRD4525-Q1
CRD4525-D1
Order#
CS4525
°C/Watt
Units
97