IRAUDAMP15 [INFINEON]
35W/4 x 2 Channel Class D Audio Power Amplifier;
| 型号： | IRAUDAMP15 |
| 厂家： | 
Infineon |
| 描述： | 35W/4 x 2 Channel Class D Audio Power Amplifier |
| 文件： | 总13页 (文件大小：524K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
IRAUDAMP15
35W/4Ω x 2 Channel Class D Audio Power Amplifier
Using the IR4311
By
Jun Honda, Liwei Zheng
CAUTION:
International Rectifier suggests the following guidelines for safe operation and
handling of IRAUDAMP15 Demo board;
Always wear safety glasses whenever operating Demo Board
Avoid physical contact with exposed metal surfaces when operating Demo
Board
Turn off Demo Board when placing or removing measurement probes
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Page 1 of 13
IRAUDAMP15 REV 1.0
TABLE OF CONTENTS........................... PAGE
INTRODUCTION..............................................................................3
SPECIFICATIONS ...........................................................................3
CONNECTION SETUP....................................................................4
TEST PROCEDURES......................................................................5
PERFORMANCE AND TEST GRAPHS ..........................................5
THERMAL INFORMATION..............................................................8
SCHEMATIC....................................................................................9
BILL OF MATERIALS ....................................................................10
PCB SPECIFICATIONS.................................................................11
REVISION CHANGES DESCRIPTIONS .......................................13
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Page 2 of 13
IRAUDAMP15 REV 1.0
Introduction
The IRAUDAMP15 reference design is a two-channel, 35W/ch half-bridge Class D audio power
amplifier with single power supply. This reference design demonstrates how to use the IR4311 IC
with single power supply, implement protection circuits, and design an optimum PCB layout using
PowIRaudio integrated Class D IC. This reference design does not require additional heatsink or fan
cooling for normal operation (one-eighth of continuous rated power).The reference design provides all
the required housekeeping power supplies for ease of use. The two-channel design is scalable for
power and the number of channels.
Applications
Docking station audio systems
PC audio systems
Musical instruments
Karaoke amplifiers
Game consoles
Powered speaker systems
Car audio amplifiers
Features
Output Power:
35W x 2 channels (4Ω load)
Multiple Protection Features:
Over-current protection (OCP), high side and low side
Over-voltage protection (OVP),
Under-voltage protection (UVP), high side and low side
Over-temperature protection (OTP)
PWM Modulator:
Self-oscillating half-bridge topology
Specifications
General Test Conditions (unless otherwise noted)
Notes / Conditions
Supply Voltages
18-31V*
2-4Ω
400kHz
21.4dB
Load Impedance
Self-Oscillating Frequency
Gain Setting
Resistive load
No input signal, Adjustable
1Vrms input yields rated power
Electrical Data
Typical
Notes / Conditions
IR Devices Used
IR4311 PowIRaudio integrated Class D IC
Modulator
Self-oscillating, second order sigma-delta modulation, analog input
Single power supply;
Power Supply Range
Output Power CH1-2: (1% THD+N)
Output Power CH1-2: (10% THD+N)
Rated Load Impedance
Idling Supply Current
Total Idle Power Consumption
Distortion
18-31V*
26W
1kHz
35W
1kHz
2-4Ω
Resistive load
No input signal
No input signal
THD+N @ 5W, 4Ω
IHF-A weighted, AES-17 filter
90mA
2.8W
0.02%
230V
96%
Residual Noise
Channel Efficiency
Single-channel driven, 35W, Class D
stage
*Power Supply Voltage Range
*R25~R28
18~27V
27~37V
220Ω
470Ω
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Page 3 of 13
IRAUDAMP15 REV 1.0
Connection Setup
18-31V, 3A DC supply
100W, Non-inductive Resistors
4 Ohm
4 Ohm
P1
P3
P2
CH1
Output
CH2
Output
Power
Indicator
IR4311
IR4311
FAULT
Indicator
FAULT
Indicator
SW1:PWM Shutdown/MUTE
SW1
CN1
Audio
Input
Audio Signal Generator
Fig 1 Typical Test Setup
Connector Description
Audio IN
POWER
CH1 OUT
CH2 OUT
CN1 Analog input for CH1 and CH2
P2
P1
P3
Single supply
Output for CH1
Output for CH2
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Page 4 of 13
IRAUDAMP15 REV 1.0
Test Procedures
Test Setup:
1. Connect 4, 100W load to both output connectors, P1 and P3 and audio analyzer (Ap).
2. Connect Audio Signal Generator to CN1 for CH1 and CH2 respectively (Ap).
3. Connect a single power supply to P2 pre-adjusted to 18-31V as shown on Figure above
4. Turn on the power supply.
5. Turn on SW1 (right side).
6. Blue LED (Normal) stays turning on after RED LED extinguished.
7. With an Oscilloscope, monitor switching waveform at VS of CH1 and CH2.
8. Quiescent current for the power supply should be 70mA 10mA at 31V.
Functionality Audio Tests:
9. Sweep the audio signal voltage from 15 mVRMS to 1.5 VRMS
.
10. Monitor the output signals at P1/P3 with an oscilloscope. The waveform must be a non
distorted sinusoidal signal with input sinusoidal signal below 1Vrms.
Performance and Test Graphs
Power vs THD+N (without heatsink)
Test Conditions:
VBus = 31V
Input Signal=1 kHz
Load Impedance = 4 ohms
THD+N vs Power
10
5
2
1
0.5
0.2
0.1
%
0.05
0.02
0.01
0.005
0.002
0.001
20m
50m
100m
200m
500m
1
2
5
10
20
40
W
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
1
3
Red
Blue
Solid
Solid
2
2
Anlr.THD+N Ratio Left
Anlr.THD+N Ratio Left
Ch1 4ohms 31V
Ch2 4ohms 31V
Fig 2
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Page 5 of 13
IRAUDAMP15 REV 1.0
Frequency Response
Test Conditions:
VBus = 31V
Set Output = 1V
Load Impedance = 4 ohms
+4
+2
T
+0
d
B
r
-2
-4
-6
-8
A
-10
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k 200k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
1
2
Red
Blue
Solid
Solid
2
2
Anlr.Level A Left
Anlr.Level B Left
Ch1 4ohm SP 25V
Ch2 4ohm SP 25V
Fig 3
Noise Floor
Test Conditions:
VBus = 31V
Load Impedance = 4 ohms
No Input Signal
+20
+0
-20
-40
d
B
V
-60
-80
-100
-120
-140
10
20
50
100
200
500
Hz
1k
2k
5k
10k
20k
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
1
2
Red
Blue
Solid
Solid
2
2
Fft.Ch.1 Ampl Left
Fft.Ch.2 Ampl Left
Ch1
Ch2
Fig 4
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Page 6 of 13
IRAUDAMP15 REV 1.0
Noise Floor with 1Vrms Output
Test Conditions:
VBus = 31V
Output = 1Vrms @ 1 KHz
Load Impedance = 4 ohms
+0
-20
-40
d
B
-60
V
-80
-100
10
20
50
100
200
500
Hz
1k
2k
5k
10k
20k
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
1
2
Red
Blue
Solid
Solid
2
2
Fft.Ch.1 Ampl Left
Fft.Ch.2 Ampl Left
Ch1 4ohm
Ch1 4ohm
Fig 5
Efficiency
100.0%
90.0%
80.0%
70.0%
60.0%
50.0%
40.0%
30.0%
20.0%
10.0%
0.0%
0
5
10
15
20
25
30
35
40
Power (W)
Fig 6
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Page 7 of 13
IRAUDAMP15 REV 1.0
Thermal Information:
1/8 Po Thermal Test
Conditions:
Tamb=25°C natural convection cooling
Both Channel Driven 1/8Po continuous 30mins
Temperature measured by infrared camera
Fig 7 IRAUDAMP15 (Vbus=31V)
IR4311’s temperature saturated around 85°C within 30minutes
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Page 8 of 13
IRAUDAMP15 REV 1.0
Schematic
P
P
U V
1
5 5 T 5 B M M
Q 4
O V
1 5 5 5 T
M M B
Q 3
2 W 1 / 0 1 k , 1 R 5
2
R 5 2 W , 1 / 1 0 k
k 2 . 2
9
R 4
k 2 . 2 0 R 5
N M
C 2
3
R 4 N M
4
R 4 N M
1 W 0 R 4 7
N M
N M
C 2
5
R 4 N M
6
R 4 N M
N M
5
6
C 2
7
8
C 2
7
R 3
1
O
O
V P
V N
V P
V N
1 2
1 0
1 2
1 0
1 5
1 5
V B
C S
M
C
C O
V C
V B
C S
M
C
C O
V C
1 3
1 4
9
8
1 3
1 4
9
8
H
H
2
2
R 3 0 1 0 k
R 4 k 1 0 0
Fig8
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Page 9 of 13
IRAUDAMP15 REV 1.0
Bill of Materials
No
Part Number
Designator
Description
Quantity
Vender
Digikey
1
490-1494-1-ND
C1, C2, C3, C4, C15, C16
C5, C6, C8, C9, C11, C12, C13,
C14
CAP CER 1000PF 50V 10% X7R 0603
6
2
3
4
5
6
7
8
9
445-1309-1-ND
587-1433-1-ND
478-1429-1-ND
399-3525-1-ND
311-1140-1-ND
445-1418-1-ND
495-1315-ND
BC2054-ND
CAP CER 2200PF 50V X7R 10% 0603
CAP CER 22UF 16V X5R 1206
8
2
4
2
3
2
2
2
2
1
1
4
1
2
4
1
2
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
C7, C10
C17, C18, C19, C20
C21, C22
C23, C24, C41
C29, C30
C35, C36
C37, C38
C42, C43
C45
CAP CER 4.7UF 10V Y5V 0805
CAP CERAMIC 10UF 16V X7R 1206
CAP CER 0.1UF 50V 10% X7R 0805
CAP CER .10UF 100V X7R 10% 0805
CAP FILM 0.47UF 400VDC RADIAL
CAP FILM 0.1UF 63VDC RADIAL
CAP ALUM 2200UF 25V 20% RADIAL
CAP 470PF 50V CERAMIC X7R 0805
CONN JACK STEREO R/A 5PIN 3.5MM
CAP ALUM 2.2UF 50V 20% RADIAL
CAP 22UF 25V ELECT VR RADIAL
DIODE SWITCH 75V 200MW SOD323
DIODE SWITCH 100V 400MW SOD-123
LED BLUE CLEAR THIN 0603 SMD
MOSFET P-CH 45V 90MA SOT23-3
10 565-1064-ND
11 311-1124-1-ND
12 CP1-3545N-ND
13 565-1103-ND
CN1
CP1, CP2, CP3, CP4
CP5
14 565-1056-ND
15 1N4148WS-FDICT-ND
16 1N4148WDICT-ND
17 160-1647-1-ND
18 BS250FCT-ND
D1, D2
D3, D4, D9, D10
DS1
FET1, FET2
Digikey
Inductors,
Inc
19 Sagami 7G13A-220M-R
20 281-1414-ND
L1, L2
Class D Inductor, 22UH 13A
2
3
2
1
2
2
2
4
2
4
4
6
4
4
2
1
1
2
2
2
2
3
3
1
1
P1, P2, P3
Prot1, Prot2
Q1
CONN TERM BLOCK PCB 5.0MM 2POS
LED RED ORANGE CLEAR 0603 SMD
TRANS PWR NPN 8A 80V DPAK
TRANSISTOR NPN 160V SOT-23
RES 4.7K OHM 1/10W 5% 0603 SMD
RES 100K OHM 1/10W 5% 0603 SMD
RES 330 OHM 1/10W 5% 0603 SMD
RES 1K OHM 1/10W 5% 0603 SMD
RES 3.01K OHM 1/8W 1% 0805 SMD
RES 47.5K OHM 1/8W 1% 0805 SMD
RES 180 OHM 1/10W 5% 0603 SMD
RES 470 OHM 1W 5% 2512 SMD
RESISTOR 4.7 OHM 1/8W 5% 0805
RES 2.7K OHM 1/10W 5% 0603 SMD
RES 4.7K OHM 1/10W 5% 0603 SMD
RES 470 OHM 1W 5% 2512 SMD
RESISTOR 1.0 OHM 1/8W 5% 0805
RES 10.0 OHM 1W 1% 2512 SMD
RES 2.2K OHM 1/8W 5% 0805 SMD
RES 10K OHM 1/2W 5% 1210 SMD
RES 47K OHM 1/8W 5% 0805 SMD
RES 10K OHM 1/8W 5% 0805 SMD
RES 10 OHM 1/8W 5% 0805 SMD
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
Digikey
21 160-1182-1-ND
22 MJD44H11T4GOSCT-ND
23 MMBT5551FSCT-ND
24 RMCF0603JT4K70CT-ND
25 RMCF0603JT100KCT-ND
26 RMCF0603JT330RCT-ND
27 RMCF0603JT1K00CT-ND
28 RHM3.01KCRCT-ND
29 311-47.5KCRCT-ND
30 RHM180GCT-ND
Q3, Q4
R1, R2
R3, R4
R5, R6, R7, R8
R9, R10
R11, R12, R13, R14
R15, R16, R17, R18
R19, R20, R21, R22, R23, R24
R25, R26, R27, R28
R29, R30, R31, R32
R33, R34
31 RMCF2512JT470RCT-ND
32 P4.7ACT-ND
33 RHM2.7KGCT-ND
34 RHM4.7KGCT-ND
35 PT470XCT-ND
R35
R37
36 P1.0ACT-ND
R41, R42
37 541-10.0AFCT-ND
38 RMCF0805JT2K20CT-ND
39 541-10KVCT-ND
R47, R48
R49, R50
R51, R52
40 RHM47KARCT-ND
41 RHM10KARCT-ND
42 311-10ARCT-ND
R53, R58, R60
R54, R55, R59
R61, R63
43 RMCF0603JT5K10CT-ND
R62
RES 5.1K OHM 1/10W 5% 0603 SMD
SWITCH TOGGLE SPDT .4VA SEAL
PCB
44 360-1758-ND
45 IR4311
S1
1
2
Digikey
IR
U1, U2
2 CH PowIRaudio integrated Class D IC
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Page 10 of 13
IRAUDAMP15 REV 1.0
46 DDZ5V1BDICT-ND
47 BZT52C11-FDICT-ND
48 568-3766-1-ND
Z1, Z2, Z3, Z4
DIODE ZENER 5.1V 500MW SOD-123
DIODE ZENER 11V 500MW SOD123
DIODE ZENER 33V 375MW SOD123F
DIODE ZENER 16V 500MW SOD-123
4
1
1
1
Digikey
Digikey
Digikey
Digikey
Z5
Z7
Z8
49 BZT52C16-FDICT-ND
PCB Specifications
PCB:
1. Two Layers SMT PCB with through holes
2. 1/16 thickness
3. 2/0 OZ Cu
4. FR4 material
5. 10 mil lines and spaces
6. Solder Mask to be Green enamel EMP110 DBG (CARAPACE) or Enthone Endplate
DSR-3241or equivalent.
7. Silk Screen to be white epoxy non conductive per IPC–RB 276 Standard.
8. All exposed copper must finished with TIN-LEAD Sn 60 or 63 for 100u inches thick.
9. Tolerance of PCB size shall be 0.010 –0.000 inches
10. Tolerance of all Holes is -.000 + 0.003”
11. PCB acceptance criteria as defined for class II PCB’S standards.
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Page 11 of 13
IRAUDAMP15 REV 1.0
PCB Layout
Top side:
Fig 9
Bottom side:
Fig 10
Note: Refer to AN1170 for footprint and board mounting details.
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Page 12 of 13
IRAUDAMP15 REV 1.0
Revision changes descriptions
Revision
Rev 1.0
Changes description
Date
May, 11 2012
Released
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105
Data and specifications subject to change without notice. 01/29/2009
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Page 13 of 13
IRAUDAMP15 REV 1.0
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