CS4412A-CNZR Cirrus Logic Inc, CS4412A-CNZR Datasheet - Page 23

• Manufacturer Part Number: CS4412A-CNZR
• Description: IC,Audio Amplifier,QUAD,LLCC,48PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc
• Series: Popguard®r
• Type: Class Dr

Specifications of CS4412A-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: Depop, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 48-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1581 - REFERENCE DESIGN FOR CS4412A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS786A2
8. THERMAL CHARACTERISTICS
8.1
9. ORDERING INFORMATION
10.REVISION HISTORY
Junction to Case Thermal Impedance
CRD4525-Q1
CRD4412A
CS4412A
Product
Release
A1
A2
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 CS4412A. 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
ciency)
θ
CA
CA
JC
J(MAX)
A
D
= Ambient temperature in °C
= RMS power dissipation of the device, equal to 0.15*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
30 W Quad Half-Bridge
J(MAX)
4 Layer / 3oz. Copper
4 Layer / 1oz. Copper
Reference Design
Reference Design
Initial Release
The following items were update:
“PWM Power Output Characteristics” on page 6
Section 4.4.1 “Half-Bridge Output Filter” on page 16
Section 4.4.2 “Full-Bridge Output Filter (Stereo or Parallel)” on page 18
Section 8.1 “Thermal Flag” on page 23
Section 9. “Ordering Information” on page 23
Digital Amplifier
Daughter Card
Description
Power Stage
Main Board
- T
Parameter
A
) / P
D
] - θ
JC
Package
48-QFN
-
-
Pb-Free
Yes
-
-
Commercial -10°C to +70°C
Changes
Grade
-
-
Symbol
IN,RMS
θ
JC
Temp Range Container
or 0.177*P
-
-
Min
-
OUT,RMS
Tape and
Typ
1
Reel
Rail
-
-
(assuming 85% effi-
Max
CS4412A-CNZR
-
CS4412A-CNZ
CRD4525-Q1
CS4412A
CRD4412A
Order#
°C/Watt
Units
23