User's Manual IRAUDAMP17 R1.1 May 24
Transcript of User's Manual IRAUDAMP17 R1.1 May 24
www.irf.com Page 1 of 13 IRAUDAMP17 REV 1.1
IRAUDAMP17
100W/4Ω x 2 Channel Class D Audio Power Amplifier Using the IR4302
By
Jun Honda, Liwei Zheng
CAUTION:
International Rectifier suggests the following guidelines for safe operation and handling of IRAUDAMP17 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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TABLE OF CONTENTS........................... PAGE INTRODUCTION..............................................................................3
SPECIFICATIONS ...........................................................................3
CONNECTION SETUP ....................................................................4
TEST PROCEDURES......................................................................5
PERFORMANCE AND TEST GRAPHS ..........................................5
THERMAL INFORMATION..............................................................8
BILL OF MATERIALS ....................................................................10
PCB SPECIFICATIONS.................................................................11
REVISION CHANGES DESCRIPTIONS .......................................13
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Introduction The IRAUDAMP17 reference design is a two-channel, 100W/ch (4 Ω/52V Bus voltage) half-bridge Class D audio power amplifier with single power supply. This reference design demonstrates how to use the IR4302 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
AV receivers Home theater systems Mini component stereos Powered speakers Sub-woofers Musical Instrument amplifiers Car audio amplifiers
Features Output Power: 100W x 2 channels (10%THD+N 4Ω load; with heatsink), 60W x 2 channels (10%THD+N 4Ω load; no heatsink), 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 40V~52V With heatsink
Supply Voltages 30V~42V *Without heatsink
Load Impedance 2-4Ω Resistive load Self-Oscillating Frequency 400kHz No input signal, Adjustable Gain Setting 24.8dB 1Vrms input yields rated power
Electrical Data Typical Notes / Conditions IR Devices Used IR4302 PowIRaudio integrated Class D IC Modulator Self-oscillating, second order sigma-delta modulation, analog input
40V~52V Single power supply; Power Supply Range
30V~42V *Without heatsink 75W 1kHz, 4Ω load, with heatsink
Output Power CH1-2: (1% THD+N) 50W 1kHz, 4Ω load, without heatsink 100W 1kHz, 4Ω load, with heatsink
Output Power CH1-2: (10% THD+N) 60W 1kHz, 4Ω load, without heatsink
Rated Load Impedance 2-4Ω Resistive load Idling Supply Current 65mA No input signal Total Idle Power Consumption 3.4W No input signal Distortion 0.008% THD+N @ 30W, 4Ω
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Residual Noise 220V IHF-A weighted, AES-17 filter Channel Efficiency 96% Single-channel driven,100W Class D
stage *Need to change components as below to achieve 30V~42V power supply voltage range without heatsink
With Heatsink Without Heatsink
Power Supply Voltage Range 40~52V 30~42V
R7~R10 390Ω 240Ω
Z5 36V 27V
Connection Setup
Fig 1 Typical Test Setup
Connector Description
Audio IN CN1 Analog input for CH1 and CH2 POWER P3 Single supply CH1 OUT P1 Output for CH1 CH2 OUT P2 Output for CH2
CN1
P1 P2P3 CH1
Output CH2
Output
Audio Input
40-52V*, 3A DC supply
4 Ohm 4 Ohm
Audio Signal Generator
IR4302
SW1
250W, Non-inductive Resistors
SW1:PWM Shutdown/MUTE
Power Indicator
FAULT Indicator
CLIP Indicator
* Without heatsink Power supply voltage range is 30~42V
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Test Procedures Test Setup:
1. Connect 4, 250W load to both output connectors, P1 and P2 and audio analyzer (Ap). 2. Connect Audio Signal Generator to CN1 for CH1 and CH2 respectively (Ap). 3. Connect a single power supply to P3 pre-adjusted to 40-52V 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 52V.
Functionality Audio Tests:
9. Sweep the audio signal voltage from 15 mVRMS to 1.5 VRMS. 10. Monitor the output signals at P1/P2 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 Test Conditions:
VBus = 52V(with heatsink) Input Signal=1 kHz
Load Impedance = 4 ohms
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Blue Solid 2 Anlr.THD+N Ratio Left CH1 4ohms 52V1 3 Magenta Solid 2 Anlr.THD+N Ratio Left CH2 4ohms 52V
0.001
10
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
%
20m 20050m 100m 200m 500m 1 2 5 10 20 50 100
W
Fig 2
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Test Conditions: VBus = 42V(without heatsink) Input Signal=1 kHz
Load Impedance = 4 ohms
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Blue Solid 2 Anlr.THD+N Ratio Left Ch1 42V 4ohms1 3 Magenta Solid 2 Anlr.THD+N Ratio Left Ch2 42V 4ohms
0.006
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
20m 10050m 100m 200m 500m 1 2 5 10 20 50
W
THD+N vs Power
Fig 3
Frequency Response Test Conditions:
VBus = 52V Set Output = 1V
Load Impedance = 4 ohms
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Blue Solid 2 Anlr.Level A Left Ch1 52V 4ohms 1 2 Magenta Solid 2 Anlr.Level B Left Ch2 52V 4ohms
-10
+4
-8
-6
-4
-2
+0
+2
dBr A
20 200k50 100 200 500 1k 2k 5k 10k 20k 50k 100k
Hz
Fig 4
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Noise Floor
Test Conditions: VBus = 52V
Load Impedance = 4 ohms No Input Signal
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Blue Solid 2 Fft.Ch.1 Ampl Left Ch11 2 Magenta Solid 2 Fft.Ch.2 Ampl Left Ch2
-140
+20
-120
-100
-80
-60
-40
-20
+0
dBV
10 20k20 50 100 200 500 1k 2k 5k 10k
Hz
Noise Floor with 1Vrms Output
Test Conditions:
VBus = 52V Set Output= 1Vrms @ 1 KHz
Load Impedance = 4 ohms
ColorSweep Trace Line Style Thick Data Axis Comment
1 1 Blue Solid 2 Fft.Ch.1 Ampl Left Ch11 2 Magenta Solid 2 Fft.Ch.2 Ampl Left Ch2
-100
+0
-80
-60
-40
-20
dBV
10 20k20 50 100 200 500 1k 2k 5k 10k
Hz
Fig5
Fig 6
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Efficiency
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
0 20 40 60 80 100 120Power (W)
Eff
icie
ncy
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 8 IRAUDAMP17 with heatsink (Vbus=52V) IR4302’s temperature saturated around 85°C within 30minutes
Fig 9 IRAUDAMP17 without heatsink (Vbus=42V)
IR4302’s temperature saturated around 82°C within 30minutes
Fig 7
*Tested with heatsink
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Schematic
Fig 10
+B
VA
A
R30
4.7R
C25
0.1u
F
R41
1R
C15
1nF
C27
0.1u
F,10
0V
SCH
_DB
_430
2 R
ev1.
2
D1
+B
SD
VC
CV
SS
R31
4.7R
C26
0.1u
F
R42
1RC
171n
F
C18
10uF
,16V
C28
0.1u
F,10
0V
C6
2.2n
F,50
VC11 2.
2nF,
50V
C9
2.2n
F,50
VC14
2.2n
F,50
V
D2
1N41
48
R28
4.7R
R32
33K
D4
1N41
48
IN-2
3
CO
MP2
2
CLI
P1
NC30
VP224
VS225
GN
D5
VS1
20
CSH227
CSH116
VB1 17
IN+1
8
VN
222
NC29
VP119
VS2
23
COM 15
VS1 18
VSS
6
IN-1
9
CO
MP1
10
IN+2
4
CSD
11
FAU
LT12
NC13
VCC 14
VN
121
VB226
COM28
VA
A7
-B31
O O
IC1
IR43
02
C5
10uF
,10V
C10
10uF
,10V
R27
10K
VA
A
DS1
DS2
R26
10K
VA
A
D3
1N41
48D
5
1N41
48
R33
33K
C19
0.1u
F,50
V
R29
10K
DS3
R35
1k 1
W
1
23
MJD
44H
11T4
GQ
1
R34
9.1k
Z3 11V
CP5
22uF
+B
R40
9.1k
L1 22uH
R452.2k
R43
10, 1
WC
310.
47uF
, 400
VLC
H
D6
CT_
PGN
D
1 2
P1
D7
C33
0.1u
F, 6
3V
L2 22uH
R462.2k
R44
10, 1
WC
320.
47uF
, 400
VRC
HC
T_PG
ND
1 2
P2
C34
0.1u
F, 6
3VD9
D8
CT_
SGN
D
C12
2.2n
F,50
V
R19
180R
R24
180R
C7
2.2n
F,50
V
R22
180R
VSS
R21
180R
C13
2.2n
F,50
V
R20
180R R
23
180R
C8
2.2n
F,50
V
R1 100k
R3
330
C1
1nF
R4
330
C2
1nFR
11
*3.0
1k 1
%
R12
*3.0
1k 1
%
CT_
SGN
D
CT_
SGN
D
INPU
T G
ND
R2 100k
R5
330
C3
1nF
R6
330
C4
1nFR
13
*3.0
1k 1
%
R14
*3.0
1k 1
%
CT_
SGN
D
CT_
SGN
D
C38 22
00uF
, 63V
R4810k, 1/2W R49 10k, 1/2W
C36
0.1u
F,10
0V
+ -
C37
0.1u
F,10
0V
+B
GN
D
C39 22
00uF
, 63V
+BG
ND
1 2
P3
R53
10k
Z4 56V
Z5 *36V
R51
47k
R52
10k
R55
47k
R56
10k
R57
47k
12 3
54 6
S1 SW S
PDT
C35
0.1u
F
Q2MMBT5551
Q3MMBT5551
+B
SD
OVP
UVP
+B
GN
D
GN
D
OFF ON
CT_
SGN
DC
T_PG
ND
CT_
PGN
D
GN
D
GN
D
INPU
T G
NDR
50
10R
0C
T_PG
ND
GN
D
R9
*390
R 1
W
R8
*390
R 1
W
R10
*390
R 1
W
R7
*390
R 1
W
Z1 5.1V
GN
D
Z2 5.1V
+B
R47
NM
GN
D
+B
GN
D
GN
D
R25
47K
D10
R15
68k
1%
R16
68k
1%
R17
68k
1%
R18
68k
1%
Cla
ss D
, AM
P17
Sche
mat
ic
CP1
2.2u
F
CP2 2.
2uF
CP3 2.2u
F
CP4 2.
2uF
21 3 5 4
CN
1
C16
22uF
, 16V
C20
0.1u
F,50
V
R47
R50
Sing
le S
uppl
y
Not
mou
nted
10 O
hm
Dua
l Sup
ply
10 O
hm
Not
mou
nted
Pow
er S
uppl
yVo
ltage
Ran
ge
With
Hea
tsin
k
390o
hm
36V
With
out H
eats
ink
240
Ohm
27V
40-5
2V30
-42V
R7,R
8,R9
,R10
Z5
*
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Bill of Materials
No Digikey P/N Designator Description Quantity Vender
1 399-1082-1-ND C1, C2, C3, C4, C15, C17 CAP CER 1000PF 50V 10% X7R 0603 6 Digikey
2 587-2668-1-ND C5, C10 CAP CER 10UF 10V 10% X7R 0805 2 Digikey
3 490-1500-1-ND C6, C7, C8, C9, C11, C12, C13, C14 CAP CER 2200PF 50V 10% X7R 0603 8 Digikey
4 587-1433-1-ND C16 CAP CER 22UF 16V 20% X5R 1206 1 Digikey
5 490-5519-1-ND C18 CAP CER 10UF 16V 10% X6S 0805 1 Digikey
6 311-1140-1-ND C19, C20 CAP CER 0.1UF 50V 10% X7R 0805 2 Digikey
7 445-1418-1-ND C25, C26 CAP CER 0.1UF 100V 10% X7R 0805 2 Digikey
8 445-1377-1-ND C27, C28, C36, C37 CAP CER 0.1UF 100V 10% X7R 1206 4 Digikey
9 495-1315-ND C31, C32 CAP FILM 0.47UF 400VDC RADIAL 2 Digikey
10 BC2054-ND C33, C34 CAP FILM 0.1UF 63VDC RADIAL 2 Digikey
11 445-1418-1-ND C35 CAP CER 0.1UF 100V 10% X7R 0805 1 Digikey
12 565-1137-ND C38, C39 CAP ALUM 2200UF 63V 20% RADIAL 2 Digikey
13 CP1-3545N-ND CN1 CONN JACK STEREO R/A 5PIN 3.5MM 1 Digikey
14 565-1103-ND CP1, CP2, CP3, CP4 CAP ALUM 2.2UF 50V 20% RADIAL 4 Digikey
15 565-1056-ND CP5 CAP ALUM 22UF 25V 20% RADIAL 1 Digikey
16 1N4148W-FDICT-ND D1, D2, D3, D4, D5, D10 DIODE SWITCH 100V 400MW SOD123 6 Digikey
17 DFLU1200-7DICT-ND D6, D7, D8, D9 DIODE ULTRA FAST POWERDI 123 4 Digikey
18 160-1181-1-ND DS1 LED RED CLEAR 0603 SMD 1 Digikey
19 160-1183-1-ND DS2 LED GREEN CLEAR 0603 SMD 1 Digikey
20 160-1646-1-ND DS3 LED BLUE CLEAR 0603 SMD 1 Digikey
21 IR4302 IC1 2 CH PowIRaudio integrated Class D IC 1 IR
22 Sagami 7G17A-220M-R L1, L2 Power Inductors Class D Inductor 22uH 2 Inductors, Inc
23 281-1414-ND P1, P2, P3 CONN TERM BLOCK PCB 5.0MM 2POS 3 Digikey
24 MJD44H11T4GOSCT-ND Q1 TRANS PWR NPN 8A 80V DPAK 1 Digikey
25 MMBT5551FSCT-ND Q2, Q3 TRANSISTOR NPN 160V SOT-23 2 Digikey
26 RMCF0603JT100KCT-ND R1, R2 RES 100K OHM 1/10W 5% 0603 SMD 2 Digikey
27 RMCF0603JT330RCT-ND R3, R4, R5, R6 RES 330 OHM 1/10W 5% 0603 SMD 4 Digikey
28 RMCF2512JT390RCT-ND R7, R8, R9, R10 RES 390 OHM 1W 5% 2512 SMD 4 Digikey
29 RHM3.01KCRCT-ND R11, R12, R13, R14 RES 3.01K OHM 1/8W 1% 0805 SMD 4 Digikey
30 311-68.0KCRCT-ND R15, R16, R17, R18 RES 68.0K OHM 1/8W 1% 0805 SMD 4 Digikey
31 RHM180GCT-ND R19, R20, R21, R22, R23, R24 RES 180 OHM 1/10W 5% 0603 SMD 6 Digikey
32 RHM47KGCT-ND R25 RES 47K OHM 1/10W 5% 0603 SMD 1 Digikey
33 RHM10KGCT-ND R26, R27, R29 RES 10K OHM 1/10W 5% 0603 SMD 3 Digikey
34 RMCF0603JT4R70CT-ND R28, R30, R31 RES TF 1/10W 4.7 OHM 5% 0603 3 Digikey
35 RHM33KGCT-ND R32, R33 RES 33K OHM 1/10W 5% 0603 SMD 2 Digikey
36 RHM9.1KARCT-ND R34, R40 RES 9.1K OHM 1/8W 5% 0805 SMD 2 Digikey
37 PT1.0KXCT-ND R35 RES 1.0K OHM 1W 5% 2512 SMD 1 Digikey
38 P1.0ACT-ND R41, R42 RESISTOR 1.0 OHM 1/8W 5% 0805 2 Digikey
39 541-10.0AFCT-ND R43, R44 RES 10.0 OHM 1W 1% 2512 SMD 2 Digikey
40 RMCF0805JT2K20CT-ND R45, R46 RES 2.2K OHM 1/8W 5% 0805 SMD 2 Digikey
41 541-10KVCT-ND R48, R49 RES 10K OHM 1/2W 5% 1210 SMD 2 Digikey
42 311-10ARCT-ND R50 RES 10 OHM 1/8W 5% 0805 SMD 1 Digikey
43 RHM47KARCT-ND R51, R55, R57 RES 47K OHM 1/8W 5% 0805 SMD 3 Digikey
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44 RHM10KARCT-ND R52, R53, R56 RES 10K OHM 1/8W 5% 0805 SMD 3 Digikey
45 360-1758-ND S1 SWITCH TOGGLE SPDT .4VA SEAL PCB 1 Digikey
46 DDZ5V1BDICT-ND Z1, Z2 DIODE ZENER 5.1V 500MW SOD-123 2 Digikey
47 BZT52C11-FDICT-ND Z3 DIODE ZENER 11V 500MW SOD123 1 Digikey
48 MMSZ5263BT1GOSCT-ND Z4 DIODE ZENER 56V 500MW SOD-123 1 Digikey
49 BZT52C36-FDICT-ND Z5 DIODE ZENER 36V 500MW SOD-123 1 Digikey
50 8401K-ND 1/2" Standoffs 4-40 STDOFF HEX M/F 4-40 .500"L ALUM 4 Digikey
51 H724-ND 4-40 Nut NUT HEX 4-40 STAINLESS STEEL 4 Digikey
52 H729-ND No. 4 Lock Washer WASHER LOCK INTERNAL #4 SS 4 Digikey
53 BER161-ND Thermal Pad THERMAL PAD .020" 4X4" GAPPAD 1/6 Digikey
IRAUDAMP17 Heatsink
Fig11
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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PCB Layout Top side:
Bottom side:
Note: Refer to AN1170 for footprint and board mounting details.
Fig 12
Fig 13
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Revision changes descriptions
Revision Changes description Date Rev 1.0 Released May, 16 2012 Rev 1.1 BOM R50=10ohm May, 24 2012
WORLD HEADQUARTERS: 101 N. Sepulveda Blvd., El Segundo, California 90245 Tel: (310) 252-7105
Data and specifications subject to change without notice. 05/16/2012