CS3511-CNZR Cirrus Logic Inc, CS3511-CNZR Datasheet - Page 24
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CS3511-CNZR
Manufacturer Part Number
CS3511-CNZR
Description
IC AMP AUDIO PWR 10 STER 32QFN
Manufacturer
Cirrus Logic Inc
Type
Class Dr
Datasheet
1.CS3511-CNZR.pdf
(26 pages)
Specifications of CS3511-CNZR
Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
11.4W x 2 @ 6 Ohm
Voltage - Supply
8.5 V ~ 13.2 V
Features
Differential Inputs, Mute, Short-Circuit and Thermal Protection, Standby
Mounting Type
Surface Mount
Package / Case
32-QFN
Product
Class-D
Output Power
11.8 W
Available Set Gain
27.3 dB
Thd Plus Noise
0.025 %, 0.019 %
Operating Supply Voltage
12 V
Supply Current
38 mA
Maximum Operating Temperature
+ 70 C
Audio Load Resistance
8 Ohms
Input Signal Type
Differential
Minimum Operating Temperature
- 10 C
Output Signal Type
Differential
Supply Type
Single
Supply Voltage (max)
13.5 V
Supply Voltage (min)
8.5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
598-1577 - BOARD REF CS3511 4LYR 1OZ CU
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
24
9. THERMAL CHARACTERISTICS
9.1
Junction to Case Thermal Impedance
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 CS3511. 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, equal to 1 °C/Watt
= [(T
= Thermal resistance of the metal plane in °C/Watt
= Maximum rated operating junction temperature in °C, equal to 150 °C
J(MAX)
- T
Parameter
A
) / P
D
] - θ
JC
Symbol
RMS-OUT
θ
JC
(assuming 85% efficiency)
Min
-
Typ
1
Max
-
CS3511
DS845F1
°C/Watt
Units