IRAUDAMP6
250W/8Ω x 2 Channel Class D Audio Power Amplifier
Using the IRS20957S and IRF6785
By
Jun Honda, Jorge Cerezo and Liwei Zheng
CAUTION:
International Rectifier suggests the following guidelines for safe operation and handling of
IRAUDAMP6 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 ..................................................................................................................................... 5
CONNECTOR DESCRIPTION ......................................................................................................................... 6
TEST PROCEDURES....................................................................................................................................... 6
PERFORMANCE AND TEST GRAPHS .......................................................................................................... 7
IRAUDAMP6 OVERVIEW .............................................................................................................................. 12
FUNCTIONAL DESCRIPTIONS..................................................................................................................... 13
CLASS D OPERATION..................................................................................................................................... 13
POWER SUPPLIES.......................................................................................................................................... 13
BUS PUMPING ............................................................................................................................................... 14
HOUSE KEEPING POWER SUPPLY................................................................................................................... 14
INPUT............................................................................................................................................................ 15
OUTPUT ........................................................................................................................................................ 15
LOAD IMPEDANCE .......................................................................................................................................... 15
GAIN SETTING / VOLUME CONTROL ................................................................................................................ 16
EFFICIENCY ................................................................................................................................................... 16
OUTPUT FILTER DESIGN AND PREAMPLIFIER ................................................................................................... 17
SELF-OSCILLATING PWM MODULATOR .......................................................................................................... 17
ADJUSTMENTS OF SELF-OSCILLATING FREQUENCY ......................................................................................... 18
SWITCHES AND INDICATORS ........................................................................................................................... 18
STARTUP AND SHUTDOWN ............................................................................................................................. 18
CLICK AND POP NOISE REDUCTION ............................................................................................................... 19
STARTUP AND SHUTDOWN SEQUENCING ........................................................................................................ 20
SELECTABLE DEAD-TIME ................................................................................................................................ 23
LEVEL SHIFTERS ........................................................................................................................................... 23
PROTECTION SYSTEM OVERVIEW ................................................................................................................... 24
Over-Current Protection (OCP)............................................................................................................... 24
Over-Voltage Protection (OVP)............................................................................................................... 26
Under-Voltage Protection (UVP) ............................................................................................................. 26
Speaker DC-Voltage Protection (DCP) ................................................................................................... 27
Offset Null (DC Offset) Adjustment ......................................................................................................... 27
Over-Temperature Protection (OTP) ...................................................................................................... 27
Thermal Considerations .......................................................................................................................... 27
Thermal Interface Material’s Pressure Control ....................................................................................... 28
AMP6 Thermal pad pressure control calculation .................................................................................... 30
Short Circuit Protection Response .......................................................................................................... 31
IRAUDAMP6 FABRICATION MATERIALS................................................................................................... 37
IRAUDAMP6 PCB SPECIFICATIONS........................................................................................................... 42
REVISION CHANGES DESCRIPTIONS........................................................................................................ 46
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Introduction
The IRAUDAMP6 reference design is a two-channel, 250W/ch (8Ω) load half-bridge Class D audio power
amplifier. This reference design demonstrates how to use the IRS20957S Class D audio controller and gate
driver IC, implement protection circuits, and design an optimum PCB layout using the IRF6785 DirectFET
MOSFETs. This reference design does not require increasing the size of the heatsink or require 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
Features
Output Power:
Residual Noise:
Distortion:
Efficiency:
Multiple Protection Features:
PWM Modulator:
250W x 2 channels (8Ω load),
90µV, IHF-A weighted, AES-17 filter
0.005% THD+N @ 125W, 8Ω
96% @ 250W, 8Ω, single-channel driven, Class D stage
Over-current protection (OCP), high side and low side
Over-voltage protection (OVP),
Under-voltage protection (UVP), high side and low side
DC-protection (DCP),
Over-temperature protection (OTP)
Self-oscillating half-bridge topology with optional clock synchronization
Specifications
General Test Conditions (unless otherwise noted)
Supply Voltages
±73.5V
Load Impedance
8-4Ω
Self-Oscillating Frequency
400kHz
Gain Setting
33dB
Notes / Conditions
No input signal, Adjustable
1Vrms input yields rated power
Electrical Data
IR Devices Used
Typical
Notes / Conditions
IRS20957S Audio Controller and Gate-Driver,
IRF6785 DirectFET MOSFETs
Modulator
Self-oscillating, second order sigma-delta modulation, analog input
Power Supply Range
± 38V to ±75V
Bipolar power supply
Output Power CH1-2: (1% THD+N)
320W
1kHz
Output Power CH1-2: (10% THD+N)
410W
1kHz
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Rated Load Impedance
Idling Supply Current
Total Idle Power Consumption
Channel Efficiency
8-4Ω
±85mA
11.9W
96%
Resistive load
No input signal
No input signal
Single-channel driven,
250W, Class D stage
.
Audio Performance
*Before
Demodula
tor
THD+N, 1W
THD+N, 10W
THD+N, 60W
THD+N, 100W
THD+N, 200W
Class D
Output
0.008%
0.003%
0.0015%
0.002%
0.009%
0.008%
0.004%
0.002%
0.004%
0.009%
Dynamic Range
117dB
113dB
Residual Noise, 22Hz - 20kHzAES17
70µV
110µV
Damping Factor
Channel Separation
2000
92dB
90dB
72dB
N/A
906
92dB
80dB
62dB
±0.25dB
±1dB
Frequency Response : 20Hz-20kHz
: 20Hz-35kHz
Thermal Performance
Idling
2ch x 31.25W (1/8 rated power)
2ch x 250W (Rated power)
Physical Specifications
Dimensions
Typical
TC =30°C
TPCB=36°C
TC =54°C
TPCB=65°C
TC =80°C
TPCB=106°C
Notes / Conditions
1kHz, Single-channel driven
A-weighted, AES-17 filter,
Single-channel operation
Self-oscillating – 400kHz
1kHz, relative to 8Ω load
100Hz
1kHz
10kHz
1W, 8Ω Load
Notes / Conditions
No signal input, TA=25°C
Continuous, TA=25°C
At OTP shutdown @ 150 sec,
TA=25°C
Weight
7.76”(L) x 5.86”(W) x 2.2”(H)
192 mm (L) x 149mm (W) x56mm(H)
0.54kgm
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Connection Setup
73.5V,8A DC supply
73.5V,8A DC supply
250W,Non-inductive Resistors
8~4 Ohm
8~4 Ohm
J1
G
CH1 Output
J3
J5
S3
CH2 Output
J8
S2
Normal
Protection
J7
CH1
Input
J6
J9
CH2
Input
R100
Volume
S1
Audio Signal Generator
Fig 1 Typical Test Setup
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Connector Description
CH1 IN
CH2 IN
POWER
CH1 OUT
CH2 OUT
EXT CLK
DCP OUT
J7
J9
J3
J1
J5
J6
J8
Analog input for CH1
Analog input for CH2
Positive and negative supply (+B / -B)
Output for CH1
Output for CH2
External clock sync
DC protection relay output
Test Procedures
Test Setup:
1. Connect 8Ω-250 W dummy loads to output connectors (J1 and J5 as shown on Fig 1) and
parallel it with input of Audio Precision analyzer (AP).
2. Connect the Audio Signal Generator to J7 and J9 for CH1 and CH2 respectively (AP).
3. Set up the dual power supply with voltages of ±73.5V;set current limit to 8A.
4. TURN OFF the dual power supply before connecting to ON of the unit under test (UUT).
5. Set switch S1 to middle position (self oscillating).
6. Set volume level knob R130 fully counter-clockwise (minimum volume).
7. Connect the dual power supply to J3. as shown on Fig 1
Power up:
8. Turn ON the dual power supply. The ±B supplies must be applied and removed at the
same time.
9. Red LED (Protection) should turn on almost immediately and turn off after about 3s.
10. Green LED (Normal) then turns on after red LED is extinguished and should stay on.
11. Quiescent current for the positive supply should be 84mA ±10mA at +73.5V.
12. Quiescent current for the negative supply should be 80mA ±10mA at –73.5V.
13. Push S3 switch(Trip and Reset push-buttom)to restart the sequence of LEDs
indicators,which should be the same as noted above in steps 9-10.
Switching Frequency test
14. Monitor switching waveform at VS1/J4(pin9-12)of CH1 and VS2/J3(pin1-4)CH2 on
Daughter Board using an Oscilloscope.
15. For IRAUDAMP6, the self-oscillating switching frequency is pre-calibrated to 400 KHz. To
modify the IRAUDAMP6 frequency, change the values of potentiometers R49 and R74 for
CH1 and CH2 respectively.
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Functionality Audio Tests:
16. Apply 1V RMS at 1kHz sinusoidal signal from the Audio Signal Generator.
17. Turn control volume up (R130 clock-wise) to obtain an output reading of 250Watts.
18. For all subsequent tests as shown on the Audio Precision graphs below (Fig 2- Fig7), the
measurements are taken across J1 and J5 with an AES-17 Filter. Observe that a 1 VRMS
input generates an output voltage of 44.7 VRMS.
19. Sweep the audio signal voltage from 15 mVRMS to 1 VRMS.
20. Monitor the output signals at J1/J5 with an oscilloscope. The waveform must be a non
distorted sinusoidal signal.
Test Setup using Audio Precision (Ap):
21. Use an unbalanced-floating signal from the generator outputs.
22. Use balanced inputs taken across output terminals, J1 and J5.
23. Connect Ap frame ground to GND at terminal J7/J9.
24. Select the AES-17 filter(pull-down menu) for all the testing except frequency response.
25. Sweep the input signal voltage from 15 mVRMS to 1 VRMS.
26. Run Ap test programs for all subsequent tests as shown in Fig 2- Fig 7below.
Performance and test graphs
10
5
2
1
0 .5
0 .2
%
0 .1
0 .0 5
0 .0 2
0 .0 1
0 .0 0 5
0 .0 0 2
0 .0 0 1
100m
200m
500m
1
2
5
10
20
50
100
200
500
1k
W
S w eep
T ra c e
C o lo r
L in e S t y le
T h ic k
D a ta
A x is
C om m ent
1
1
1
3
B lu e
R ed
S o lid
S o lid
2
2
A n lr. T H D + N R a t io
A n lr. T H D + N R a t io
L e ft
L e ft
CH2
CH1
±B Supply = ±73.5V, 8 Ω Resistive Load
Fig 2 IRAUDAMP6, THD+N versus Power, Stereo, 8 Ω
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8 ohm load
4 ohm load
Fig 3 IRAUDAMP6, Frequency response
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100
10
.
1
%
0.1
0.01
0.001
0.0001
20
50
100
200
500
1k
2k
5k
10k
Hz
Sweep Trace Color
Line Style Thick Data
Axis Comment
1
1
2
2
Solid
Solid
Solid
Solid
Left
Left
Left
Left
1
2
1
2
Red
Blue
Magenta
Green
2
2
2
1
Anlr.THD+N Ratio
Anlr.THD+N Ratio
Anlr.THD+N Ratio
Anlr.THD+N Ratio
125W L
125W R
25W L
25W R
Fig 4 THD+N Ratio vs. Frequency
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20k
+0
-20
-40
d
B
V
-60
-80
-100
10
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
Sweep
Trace
Color
Line Style
Thick
Data
Axis
1
1
1
2
Magenta
Blue
Solid
Solid
1
1
Fft.Ch.1 Ampl
Fft.Ch.2 Ampl
Left
Left
Comment
Fig 5, 1V output Frequency Spectrum
+20
+0
-20
-40
d
B
V
-60
-80
-100
-120
-140
10
20
50
100
200
500
1k
2k
5k
10k
Hz
Sweep
Trace
Color
Line Style
Thick
Data
Axis
1
1
1
2
Red
Blue
Solid
Solid
1
1
Fft.Ch.1 Ampl
Fft.Ch.2 Ampl
Left
Left
Comment
No signal, Self Oscillator @ 400kHz
Fig 6, IRAUDAMP6 Noise Floor
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20k
.
Fig 7, Channel separation vs. frequency
.
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IRAUDAMP6 Overview
The IRAUDAMP6 features a 2CH self-oscillating type PWM modulator for the lowest component
count, highest performance and robust design. This topology represents an analog version of a
second-order sigma-delta modulation having a Class D switching stage inside the loop. The
benefit of the sigma-delta modulation, in comparison to the carrier-signal based modulation, is that
all the error in the audible frequency range is shifted to the inaudible upper-frequency range by
nature of its operation. Also, sigma-delta modulation allows a designer to apply a sufficient
amount of error correction.
The IRAUDAMP6 self-oscillating topology consists of following essential functional blocks.
• Front-end integrator
• PWM comparator
• Level shifters
• Gate drivers and MOSFETs
• Output LPF
Feedback
Daughter-board
U1
Σ
+B
U1
Integrator
LPF
GND
IRS20957S
Gate Driver
IRF6785
Direct-FET
-B
Fig 8, Simplified Block Diagram of Class D Amplifier
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Functional Descriptions
Class D Operation
Referring to CH1 as an example, the op-amp U6 forms a front-end second-order integrator with
C38, C42 & R50 + R49P. This integrator receives a rectangular feedback waveform from the
Class D switching stage and outputs a quadratic oscillatory waveform as a carrier signal. To
create the modulated PWM signal, the input signal shifts the average value of this quadratic
waveform (through gain relationship between R40,AR154 and R38 + R39) so that the duty varies
according to the instantaneous value of the analog input signal. The IRS20957 input comparator
processes the signal to create the required PWM signal. This PWM signal is internally level-shifted
down to the negative supply rail where this signal is split into two signals, with opposite polarity
and added deadtime, for high-side and low-side MOSFET gate signals, respectively. The
IRS20957 drives two IRF6785 DirectFET MOSFETs in the power stage to provide the amplified
PWM waveform. The amplified analog output is re-created by demodulating the amplified PWM.
This is done by means of the LC low-pass filter (LPF) formed by L4 and C34, which filters out the
Class D switching carrier signal.
Power Supplies
The IRAUDAMP6 has all the necessary housekeeping power supplies onboard and only requires
a pair of symmetric power supplies ranging from ±38 V to ±82 V (+B, GND, -B) for operation. The
internally-generated housekeeping power supplies include a ±5 V supply for analog signal
processing (preamp, etc.), while a +12 V supply (VCC), referenced to –B, is included to supply the
Class D gate-driver stage.
For the externally-applied power, a regulated power supply is preferable for performance
measurements, but not always necessary. The bus capacitors, C45 ~ C48 on the motherboard,
along with high-frequency bypass-caps C19 ~ C26 on daughter board, address the high-frequency
ripple current that result from switching action. In designs involving unregulated power supplies,
the designer should place a set of bus capacitors, having enough capacitance to handle the audioripple current, externally. Overall regulation and output voltage ripple for the power supply design
are not critical when using the IRAUDAMP6 Class D amplifier as the power supply rejection ratio
(PSRR) of the IRAUDAMP6 is excellent (Fig 9).
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Fig 9, Amp6 Power Supply Rejection Ratio (PSRR)
Bus Pumping
Since the IRAUDAMP6 is a half-bridge configuration, bus pumping does occur. Under normal
operation during the first half of the cycle, energy flows from one supply through the load and into
the other supply, thus causing a voltage imbalance by pumping up the bus voltage of the receiving
power supply. In the second half of the cycle, this condition is opposite, resulting in bus pumping
of the other supply.
These conditions worsen bus pumping:
–
Lower frequencies (bus-pumping duration is longer per half cycle)
–
Higher power output voltage and/or lower load impedance (more energy transfers between
supplies)
–
Smaller bus capacitors (the same energy will cause a larger voltage increase)
The IRAUDAMP6 has protection features that will shutdown the switching operation if the bus
voltage becomes too high (>82 V) or too low (71.87N
=>So spring does not have enough strength support push pin more than solid height.
Then, spring height=solid height
Clearance between push pin and heatsink=2.9mm
Pin height-PCB thickness-heatsink height (substructure height)-thermal pad thickness*X%
X=72%
According to Fig22
When Strain=28%, Stress=45psi within the required range 10-50psi
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Short Circuit Protection Response
Figs 23-24 show over current protection reaction time of the IRAUDAMP6 in a short circuit event.
As soon as the IRS20957 detects an over current condition, it shuts down PWM. After one
second, the IRS20957 tries to resume the PWM. If the short circuit persists, the IRS20957 repeats
try and fail sequences until the short circuit is removed.
Short Circuit in Positive and Negative Load Current
CSD pin
CSD pin
VS pin
VS pin
Load current
Load current
Positive OCP
Negative OCP
Fig 23, Positive and Negative OCP Waveforms
.
OCP Waveforms Showing CSD Trip and Hiccup
CSD pin
CSD pin
VS pin
VS pin
Load current
Load current
Fig 24 OCP Response with Continuous Short Circuit
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Schematic
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Fig 22 IRAUDAMP6 Schematic
IRAUDAMP6 Fabrication Materials
Table 1 IRAUDAMP6 Mother board’s Materials
No
P/N
Designator
Description
CAP 10UF 50V ELECT SMG
RAD
CAP 10UF 16V CERAMIC X7R
1206
CAP 4.7UF 100V ELECT SMG
RAD
CAP CER 1.0UF 100V 10% X7R
1210
CAP CER 22000PF 50V 5% C0G
0805
CAP CERM .47UF 10% 16V X7R
0805
CAP CER 4.7UF 50V 10% X7R
1210
CAP CER 8200PF 50V C0G 5%
0805
CAP 330PF 100V CERAMIC
X7R 0805
CAP CERM 6800PF 5% 50V
X7R 0805
CAP CERM 2200PF 5% 100V
X7R 0805
CAP CER 150PF 3000V C0G
10% 1812
CAP .33UF 2000VDC POLY
FILM AXL
Quantity
Vendor
5
Digikey
3
Digikey
6
Digikey
3
Digikey
3
Digikey
3
Digikey
3
Digikey
3
Digikey
3
Digikey
3
Digikey
3
Digikey
2
Digikey
2
Digikey
5
Digikey
2
Digikey
4
Digikey
2
Digikey
2
Digikey
4
Digikey
4
Digikey
4
Digikey
1
Digikey
1
Digikey
1
Digikey
1
Digikey
2
Digikey
1
Digikey
3
Digikey
1
Digikey
4
Digikey
8
Digikey
1
565-1106-ND
C1, C33, C50, C75, C77
2
PCC13491CT-ND
C2, C82, C83
3
565-1147-ND
C3, C6, C23, C84, C85, C86
4
490-1857-1-ND
C4, C7, C24
5
490-1644-1-ND
C9, C11, C25
6
478-1403-1-ND
C10, C13, C26
7
490-1864-1-ND
C12, C16, C27
8
445-2685-1-ND
C14, C19, C28
9
PCC1982CT-ND
C15, C20, C29
10
478-3772-1-ND
C17, C21, C30
11
478-3746-1-ND
C18, C22, C31
12
445-2378-1-ND
C32, C49
13
14
338-1178-ND
C34, C51
PCE3101CT-ND
C35, C64, C65, C69, C79
15
495-1311-ND
C36, C53
16
PCC2009CT-ND
C38, C42, C56, C60
17
PCC1931CT-ND
C39, C57
18
478-1281-1-ND
C40, C58
19
445-1432-1-ND
C41, C43, C59, C61
20
565-1161-ND
C45, C46, C47, C48
21
PCC1812CT-ND
C62, C63, C68, C78
22
565-1037-ND
C66
23
445-1418-1-ND
C67
24
PCC101CGCT-ND
C70
25
493-1042-ND
C71
26
445-2322-1-ND
C72, C73
27
PCC103BNCT-ND
C80
28
B180DICT-ND
D1, D2, D4
29
B1100-FDICT-ND
D3
30
31
641-1166-1-ND
D5, D6, D13, D14
CAP 10UF 16V ELECT FC SMD
CAP .10UF 400V METAL
POLYPRO
CAP CERAMIC 1000PF 200V
NP0 1206
CAP 2.2UF 16V CERAMIC X7R
1206
CAP CERM 33PF 5% 100V NP0
0805
CAP CER 3.3UF 50V X7R 20%
1210
CAP 1200UF 100V ELECT SMG
RAD
CAP .1UF 16V CERAMIC X7R
0805
CAP 100UF 16V ELECT SMG
RAD
CAP CER .10UF 100V X7R 10%
0805
CAP 100PF 50V CERM CHIP
0805 SMD
CAP 330UF 16V ELECT VR
RADIAL
CAP CER 2200PF 100V C0G 5%
0805
CAP 10000PF 50V CERM CHIP
0805
DIODE SCHOTTKY 80V 1A
SMA
DIODE SCHOTTKY 100V 1A
SMA
DIODE STANDARD 2A 400V
SMB
1N4148WDICT-ND
D7, D8, D9, D10, D12, D15, D16,
DIODE SWITCH 100V 400MW
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D17
SOD-123
32
1N5819HW-FDICT-ND
D11, D18
33
1N4148WTPMSCT-ND
D19, D20, D21, D22
34
RS1DB-FDICT-ND
D23
35
277-1271-ND
J1, J5
36
A26453-ND
J2
37
277-1272-ND
J3
38
A26454-ND
J4
39
A32248-ND
J6
40
CP-1418-ND
J7, J9
41
N/A
J8
42
A26453-ND
J10
43
44
513-1051-1-ND
L1, L2, L3
7G31A-220M-R
L4, L5
45
160-1143-ND
NORMAL1
46
N/A
P1
47
160-1140-ND
PROTECTION1
48
FZT855CT-ND
Q1, Q3
49
MMBTA92DICT-ND
Q2
50
MMBT5401DICT-ND
Q7, Q10, Q13
51
MMBT5551-7DICT-ND
Q8, Q9, Q11, Q12, Q14, Q15, Q17
52
PZT2222ACT-ND
PZT2907AT1GOSCTND
Q18
Q20
PT10XCT-ND
R1, R4, R9, R14, R30
55
P10KACT-ND
R2, R3, R5, R7, R84, R92, R99
56
P20KACT-ND
57
P47ACT-ND
R6, R142
R56, R79, R82, R88, R101, R107,
R133, R134, R135
58
RHM8.66KCRCT-ND
R10
59
P18.7KCCT-ND
R11, R17, R32
60
P1.00KCCT-ND
R13
61
P4.7KCCT-ND
R15, R31
62
P20.5KCCT-ND
R16, R19, R37
63
P1.00KCCT-ND
64
P100KACT-ND
R18, R36
R20, R21, R22, R47, R53, R60, R61,
R87, R91, R108, R109, R112, R116,
R117, R118, R119, R132, R136
53
54
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DIODE SCHOTTKY 40V 1A
SOD123
DIODE SWITCH 100V 150MA
SOD123
DIODE FAST REC 200V 1A
SMB
CONN TERM BLOCK 2POS
9.52MM PCB
CONN RECEPT 6POS .100
VERT DUAL
CONN TERM BLOCK 3POS
9.52MM PCB
CONN RECEPT 8POS .100
VERT DUAL
CONN JACK BNC R/A 50 OHM
PCB TIN
CONN RCA JACK R/A BLACK
PCB
TERMINAL BLOCK 7.50MM
VERT 2POS
CONN RECEPT 6POS .100
VERT DUAL
INDUCTOR SHIELD PWR
470UH SMD
Class D Inductor,22uH
LED 3MM GREEN
TRANSPARENT
Power MOSFET Photovoltaic
Relay
LED 3MM HI-EFF RED
TRANSPARENT
TRANS NPN 150V 4000MA
SOT-223
TRANSISTOR PNP -300V SOT23
TRANS 150V 350MW PNP SMD
SOT-23
TRANS 160V 350MW NPN SMD
SOT-23
TRANS AMP NPN GP 40V .5A
SOT-223
TRANS SS SW PNP 600MA 60V
SOT223
RES 10 OHM 1W 5% 2512 SMD
RES 10K OHM 1/8W 5% 0805
SMD
RES 20K OHM 1/8W 5% 0805
SMD
RES 47 OHM 1/8W 5% 0805
SMD
RES 8.66K OHM 1/8W 1% 0805
SMD
RES 18.7K OHM 1/8W 1% 0805
SMD
RES 1.00K OHM 1/8W 1% 0805
SMD
RES 4.70K OHM 1/8W 1% 0805
SMD
RES 20.5K OHM 1/8W 1% 0805
SMD
RES 1.00K OHM 1/8W 1% 0805
SMD
RES 100K OHM 1/8W 5% 0805
SMD
IRAUDAMP6 REV 1.0
2
Digikey
4
Digikey
1
Digikey
2
Digikey
1
Digikey
1
Digikey
1
Digikey
1
Digikey
2
Digikey
1
Digikey
1
Digikey
3
Digikey
2
Inductors, Inc
1
Digikey
1
IR
1
Digikey
2
Digikey
1
Digikey
3
Digikey
7
Digikey
1
Digikey
1
Digikey
5
Digikey
7
Digikey
2
Digikey
9
Digikey
1
Digikey
3
Digikey
1
Digikey
2
Digikey
3
Digikey
2
Digikey
15
Digikey
Page 38 of 46
65
PPC100KW-3JCT-ND
R38, R62
66
P1.0KECT-ND
R39, R63
67
P3.3KZCT-ND
R40, R64
68
P22KACT-ND
R41, R55, R57, R65, R67, R73
69
P0.0ACT-ND
R42, R66
70
71
PT2.2KXCT-ND
R43, R68
PT10XCT-ND
R45, R70
72
311-470ARCT-ND
R46, R71
73
P4.7ACT-ND
R48, R54, R72, R78
74
3361P-102GCT-ND
R49, R74
75
P100ECT-ND
76
P1.0KACT-ND
R50, R75, R80, R90, R94
R51, R52, R76, R77, R104, R106,
R121, R138
77
P200KACT-ND
R58, R59
78
P33KACT-ND
79
P47KACT-ND
R81
R83, R86, R93, R95, R96, R105,
R111, R123, R129, R139, R140
80
P68KACT-ND
R85, R97
81
P4.7KACT-ND
R89
82
P100ACT-ND
R98, R114, R131
83
3362H-502LF-ND
R100
84
P330ACT-ND
R102
85
P82KACT-ND
86
P5.76KFCT-ND
R103
R110, R113, R120, R124, R126,
R127
87
P10ECT-ND
R115
88
P0.0ECT-ND
R122, R128
89
90
P3G7103-ND
R130
RMCF1/100RCT-ND
R141, R148, R151
91
92
93
P47.5KCCT-ND
PT10XCT-ND
RES 100K OHM METAL FILM
3W 5%
RES 1.0K OHM 1/4W 5% 1206
SMD
RES 3.3K OHM 1/10W .1% 0805
SMD
RES 22K OHM 1/8W 5% 0805
SMD
RES 0.0 OHM 1/8W 5% 0805
SMD
RES 2.2K OHM 1W 5% 2512
SMD
RES 10 OHM 1W 5% 2512 SMD
RES 470 OHM 1/8W 5% 0805
SMD
RESISTOR 4.7 OHM 1/8W 5%
0805
TRIMPOT 1K OHM 6MM SQ
SMD
RES 100 OHM 1/4W 5% 1206
SMD
RES 1.0K OHM 1/8W 5% 0805
SMD
RES 200K OHM 1/8W 5% 0805
SMD
RES 33K OHM 1/8W 5% 0805
SMD
RES 47K OHM 1/8W 5% 0805
SMD
RES 68K OHM 1/8W 5% 0805
SMD
RES 4.7K OHM 1/8W 5% 0805
SMD
RES 100 OHM 1/8W 5% 0805
SMD
POT 5.0K OHM 1/4" SQ CERM
SL ST
RES 330 OHM 1/8W 5% 0805
SMD
RES 82K OHM 1/8W 5% 0805
SMD
RES 5.76K OHM 1/4W 1% 1206
SMD
RES 10 OHM 1/4W 5% 1206
SMD
RES ZERO OHM 1/4W 5% 1206
SMD
POT 10K OHM 9MM VERT
MET BUSHING
2
Digikey
2
Digikey
2
Digikey
6
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
4
Digikey
2
Digikey
5
Digikey
8
Digikey
2
Digikey
1
Digikey
11
Digikey
2
Digikey
1
Digikey
3
Digikey
1
Digikey
1
Digikey
1
Digikey
6
Digikey
1
Digikey
2
Digikey
1
Digikey
3
Digikey
R144, R145, R146
RES 0.0 OHM 1/8W 0805 SMD
RES 47.5K OHM 1/8W 1% 0805
SMD
3
Digikey
R147, R149, R150
RES 10 OHM 1W 5% 2512 SMD
3
Digikey
open
R152
1
Digikey
94
P0.0ACT-ND
R153
1
Digikey
95
96
311-1.0KARCT-ND
R154, R155
0ohm for 1kw
RES 1.0K OHM 1/8W 5% 0805
SMD
RES 1.0K OHM 1/8W 5% 0805
SMD
2
Digikey
open
R156, R157
97
98
EG1944-ND
S1, S2
P8010S-ND
S3
LM5574MT-ND
IRF7380
99
100
www.irf.com
Bypass vol ctrl
SWITCH SLIDE DP3T .2A
L=6MM
2
2
Digikey
1
Digikey
U2, U3, U4
6MM LIGHT TOUCH SW H=5
IC REG BUCK 75V 0.5A 16TSSOP
3
Digikey
U5, U9
80V DUAL N MOSFET SO8
2
IR
IRAUDAMP6 REV 1.0
Page 39 of 46
101
AD825ARZ-ND
U6, U11
102
XN0121500LCT-ND
U7, U10
103
296-1089-1-ND
U8, U12
104
105
296-11643-1-ND
U13
300-8001-1-ND
U14
106
107
296-1194-1-ND
U_1
3310IR02
U_2
108
598-1599-ND
U_3
109
Z1
110
BZT52C15-7DICT-ND
MMSZ5263BT1OSCTND
Z2, Z3
111
BZT52C5V1-7DICT-ND
Z4
112
BZT52C15-FDICT-ND
Z5, Z6
113
BZT52C18-FDICT-ND
Z7
114
Z8
115
BZT52C36-7DICT-ND
MMSZ5268BT1GOSCTND
116
BZT52C5V6-FDICT-ND
Z10, Z12
IC AMP JFET HS GEN-PURP 8SOIC
TRANS ARRAY NPN/NPN
W/RES MINI5P
IC SINGLE INVERTER GATE
SOT23-5
DUAL 4-BIT BINARY
COUNTERS
Z9
2
Digikey
2
Digikey
2
Digikey
1
Digikey
OSCILLATOR 1.5440 MHZ SMT
IC HEX SCHMITT-TRIG INV
14-SOIC
1
Digikey
1
Digikey
Stand-alone Controller
Amplifiers - Audio Stereo Digital
Volume Control
DIODE ZENER 15V 500MW
SOD-123
DIODE ZENER 500MW 56V
SOD123
DIODE ZENER 5.1V 500MW
SOD-123
DIODE ZENER 500MW 15V
SOD123
DIODE ZENER 500MW 18V
SOD123
DIODE ZENER 36V 500MW
SOD-123
DIODE ZENER 82V 500MW
SOD-123
DIODE ZENER 5.6V 500MW
SOD123
1
Tachyonix
1
Digikey/Mouser
1
Digikey
2
Digikey
1
Digikey
2
Digikey
1
Digikey
1
Digikey
1
Digikey
2
Digikey
Table 2 IRAUDAMP6 Daughter board’s Materials
No
P/N
Designator
Description
CAP CER 47000PF 100V X7R
10%0805
CAP 47PF 50V CERM CHIP 0805
SMD
Quantity
1
445-2276-1-ND
C1, C2, C3, C4
2
3
PCC470CGCT-ND
C5, C6
587-1329-1-ND
C9, C10, C13, C14
4
399-3706-1-ND
C11, C12
5
445-1607-1-ND
C15, C16
6
445-2296-1-ND
7
445-2300-1-ND
C17, C18
C19, C20, C21, C22, C23, C24, C25,
C26
8
B130LAW-FDICT-ND
D2, D3
9
1N4148WTPMSCT-ND
D4, D5
10
ES1D-FDICT-ND
D6, D7
11
BAV21W-FDICT-ND
D8, D9
12
2011-03-ND
J1, J2
13
2011-04-ND
J3
14
MMBT5551-7DICT-ND
Q1, Q4
15
16
MMBT5401DICT-ND
Q2, Q3
CAP CER 2.2UF 25V X7R 1206
CAPACITOR TANT 10UF 16V
10% SMD
CAP CER 22UF 25V X7R 20%
1812
CAP CER .22UF 250V X7R 10%
1210
CAP CER .10UF 630V X7R 10%
1812
DIODE SCHOTTKY 1A 30V
SOD123
DIODE SWITCH 100V 150MA
SOD123
DIODE ULTRA FAST 1A 200V
SMA
DIODE SWITCH 200V 250MW
SOD123
CONN HEADER .100 DUAL STR
6POS
CONN HEADER .100 DUAL STR
8POS
TRANS 160V 350MW NPN SMD
SOT-23
TRANS 150V 350MW PNP SMD
SOT-23
IRF6785M
Q5, Q6, Q7, Q8
DirectFET M-Case
www.irf.com
IRAUDAMP6 REV 1.0
Vendor
4
Digikey
2
Digikey
4
Digikey
2
Digikey
2
Digikey
2
Digikey
8
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
1
Digikey
2
Digikey
2
Digikey
4
IR
Page 40 of 46
RES 100K OHM 1/8W 5% 0805
SMD
RES 10K OHM 1/8W 5% 0805
SMD
RES 1.0K OHM 1/8W 5% 0805
SMD
RES 9.1K OHM 1/8W 5% 0805
SMD
RES 100 OHM 1/8W 5% 0805
SMD
RES 18K OHM 1/4W 5% 1206
SMD
RES 1.2K OHM 1/8W 5% 0805
SMD
RES 8.2K OHM 1/8W 5% 0805
SMD
RES 3.3K OHM 1/8W 5% 0805
SMD
RESISTOR 4.7 OHM 1/8W 5%
0805
17
P100KACT-ND
R1, R3, R5, R7, R9, R11
18
P10KACT-ND
R2, R8, R30, R31
19
P1.0KACT-ND
R4, R6
20
RHM9.1KARCT-ND
R12, R13
21
P100ACT-ND
R14, R15
22
RHM18KERCT-ND
R16, R17
23
RHM1.2KARCT-ND
R18, R20
24
P8.2KACT-ND
R19, R21
25
P3.3KACT-ND
R22, R23
26
27
P4.7ACT-ND
R24, R25
P10ACT-ND
R26, R27, R36, R37, R38, R39
28
P33KACT-ND
R28, R29
29
RHM2.2KARCT-ND
R32, R33
30
RHM7.5KARCT-ND
R34, R35
31
P1.0PCT-ND
R40, R41
32
33
34
P0.0ACT-ND
R42, R43
RES 10 OHM 1/8W 5% 0805 SMD
RES 33K OHM 1/8W 5% 0805
SMD
RES 2.2K OHM 1/8W 5% 0805
SMD
RES 7.5K OHM 1/8W 5% 0805
SMD
RES 1.0 OHM 1/4W 5% 1206
SMD
RES 0.0 OHM 1/8W 5% 0805
SMD
594-2381-675-20907
Rp1, Rp2
Thermistors PTC Temp Prot. 100 C
IRS20957S
U1, U2
IC GATE DRIVER
6
Digikey
4
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
6
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Digikey
2
Mouser
2
IR
Table 3 IRAUDAMP6 Mechanical Bill of Materials
No
1
2
3
4
www.irf.com
P/N
Description
Quantity
Vendor
BER229-ND
DCC5837U18B
THERMAL PAD 8"X16" .080" GP1500
Heat Sink 57.9 x 36.8 x 17.8
1
Alpha Novatech Inc.
S001YZ1H
PIP 3.175*8.5[TH]
4
Alpha Novatech Inc.
S001YJ1D
Spring
4
Alpha Novatech Inc.
IRAUDAMP6 REV 1.0
Digikey
Page 41 of 46
IRAUDAMP6 PCB Specifications
PCB:
1.
2.
3.
4.
5.
6.
Two Layers SMT PCB with through holes
1/16 thickness
2/0 OZ Cu
FR4 material
10 mil lines and spaces
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.
Gerber Files Apertures Description:
All Gerber files stored in the attached CD-ROM were generated from Protel Altium Designer
Altium Designer 6. Each file name extension means the following:
1. .gtl
2. .gbl
3. .gto
4. .gbo
5. .gts
6. .gbs
7. .gko
8. .gm1
9. .gd1
10. .gg1
11. .txt
12. .apr
Top copper, top side
Bottom copper, bottom side
Top silk screen
Bottom silk screen
Top Solder Mask
Bottom Solder Mask
Keep Out,
Mechanical1
Drill Drawing
Drill locations
CNC data
Apertures data
Additional files for assembly that may not be related with Gerber files:
13. .pcb
14. .bom
15. .cpl
16. .sch
17. .csv
18. .net
19. .bak
20. .lib
www.irf.com
PCB file
Bill of materials
Components locations
Schematic
Pick and Place Components
Net List
Back up files
PCB libraries
IRAUDAMP6 REV 1.0
Page 42 of 46
Fig 25 IRAUDAMP6 Mother board PCB Top Overlay (Top View)
www.irf.com
IRAUDAMP6 REV 1.0
Page 43 of 46
Fig 26 IRAUDAMP6 Mother board PCB Bottom Layer (Top View)
www.irf.com
IRAUDAMP6 REV 1.0
Page 44 of 46
Fig 27 IRAUDAMP6 Daughter board PCB Top Overlay (Top View)
Fig 28 IRAUDAMP6 Daughter board PCB Bottom Layer (Top View)
www.irf.com
IRAUDAMP6 REV 1.0
Page 45 of 46
Revision changes descriptions
Revision
Rev 1.0
Changes description
Released
Date
May, 30 2010
WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105
Data and specifications subject to change without notice. 01/29/2009
www.irf.com
IRAUDAMP6 REV 1.0
Page 46 of 46
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