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30

RD-0617 

 

 

IRAUDAMP4 Bill of Materials 

Motherboard: 

IRAUDAMP4 MOTHERBOARD BILL OF MATERIAL 

NO Designator  # 

Footprint 

PartType 

Part 

No 

Vender 

C1, C5, C6, C101, C102, C103, C104, 
C105, C106, C115 

10 RB2/5 

10uF, 

50V 

565-1106-ND 

Digikey 

C2, C3 

RB2/5 

2.2uF, 50V 

565-1103-ND 

Digikey 

C7, C8, C9, C10 

CR3225-1210 

3.3uF, 50V 

445-1432-1-ND 

Digikey 

C11, C12, C13, C14 

1206 

1nF, 200V 

PCC2009CT-ND 

Digikey 

5 C15, 

C16 

805 

33pF 

478-1281-1-ND 

Digikey 

6 C17, 

C18 

AXIAL0.19R  150pF, 

500V  338-1052-ND 

Digikey 

C19, C20 

1206 

2.2uF, 16V 

PCC1931CT-ND 

Digikey 

8 C119 

1206 

0.1uF, 

50V 

PCC104BCT-ND 

Digikey 

C23, C24 

CAP MKP 

0.47uF, 630V 

495-1315-ND 

Digikey 

10 C23_1, 

C24_1 

2 AXIAL0.2R 

OPEN 

Digikey 

11 

C25, C26 

CAP MKPs 

0.1uF, 400V 

495-1311-ND 

Digikey 

12 

C27, C28, C29, C30, C40, C41, C42, 
C43, C44, C45, C46, C47 

1

805 OPEN 

Digikey 

13 

R29, R30, R55, R56, R60, R61, R62, 
R63, R64, R65, R66, R67, R71, R72 

1

805 OPEN 

Digikey 

14 C31, 

C32 

2 RB5/12_5 

1000uF,50V 

565-1114-ND 

Digikey 

15 

C33, C34, C48, C49 

AXIAL0.1R 

OPEN 

Digikey 

16 

C107, C109 

805 

4.7uF, 16V 

PCC2323CT-ND 

Digikey 

17 

C108, C114 

805 

10nF, 50V PCC103BNCT-ND  Digikey 

18 C110 

1 805 

1nF, 

50V 

PCC102CGCT-ND 

Digikey 

19 C111, 

C113 

2 805 

100pF, 

50V 

PCC101CGCT-ND Digikey 

20 C112 

1 805 

1200pF, 

50V  478-1372-1-ND 

Digikey 

21 C116, 

C117 

2 rb2/5 

100uF, 

16V 

565-1037-ND 

Digikey 

22 

D1, D2, D3, D4, D11, D12, D103, D104, 
D105, D106, D107 

1

SOD-123 1N4148  1N4148WDICT-ND Digikey 

23 

D5, D6, D7, D8 

SMA 

MURA120 

MURA120T3OSCT-ND 

Digikey 

24 D101, 

D102 

2 SOD-123 

MA2YD2300  MA2YD2300LCT-ND 

Digikey 

25 HS1 

1 Heat_S6in1 

HEAT 

SINK 

294-1086-ND 

Digikey 

26 

J1A, J1B 

CON EISA-31 

CON EISA31 

A26453-ND 

Digikey 

27 J2A, 

J2B 

2 CON_POWER  CON_POWER  A26454-ND 

Digikey 

28 J3, 

J4 

2 MKDS5/2-9.5  277-1022 

277-1271-ND or  651-
1714971  

Digikey 

or 

Mouser  

29 J5, 

J6 

2 cp1418 

1418-ND 

CP-1418-ND 

Digikey 

30 J7 

1 J 

HEADER3 

277-1272 

277-1272-ND or  651-
1714984  

Digikey 

or 

Mouser  

31 J8 

1 BNC_RA 

CON  BNC 

A32248-ND 

Digikey 

32 J9 

1 ED1567 

ED1567 

ED1567 

Digikey 

33 L1, 

L2 

2 Inductor 

22uH 

'Sagami 7G17A-220M-

or 
IN09063 

'Inductor

s, Inc. 

or 

ICE 

Compon

ents, Inc. 

34 NORMAL 

1 Led 

rb2/5 

404-1106-ND  160-1143-ND 

Digikey 

35 P1 

1 DIP-6 

PVT412 

PVT412-ND 

Digikey 

36 PROTECTION 

1 Led 

rb2/5 

404-1109-ND  160-1140-ND 

Digikey 

37 Q101 

1 SOT89 

FX941 

FCX491CT-ND 

Digikey 

38 

Q102, Q104, Q106, Q111 

SOT23-BCE 

MMBT5401 

MMBT5401DICT-ND 

Digikey 

39 

Q103, Q105, Q107, Q108, Q109, Q110, 
Q112 

7 SOT23-BCE 

MMBT5551 

MMBT5551-7DICT-ND  Digikey 

40 

R1, R2, R51, R52, R57, R58, R110, 
R126 

8 805 

100K 

P100KACT-ND 

Digikey 

41 

R3, R4, R114 

805 

100R 

P100ACT-ND 

Digikey 

42 R5, 

R6 

2 1206 

4.7R 

P4.7ECT-ND 

Digikey 

43 

R7, R8, R10, R11, R27, R28, R115, 
R116, R117 

9 805 

47R 

P47ACT-ND 

Digikey 

44 R9, 

R105 

2 805 

10R 

P10ACT-ND 

Digikey 

45 

R13, R14 

805 

3.3K, 1% 

P3.3KZCT-ND 

Digikey 

46 R17, 

R18 

2 805 

22k 

P22KACT-ND 

Digikey 

47 

R53, R54, R106, R121, R122, R130, 
R131, R132, R133, R137, R139, R141, 
R145, R146, R147, R149, R150, R151 

1

805 47k P47KACT-ND 

Digikey 

48 R152 

1 805 

OPEN 

Digikey 

49 R19, 

R20 

2 805 

0R 

P0.0ACT-ND 

Digikey 

50 R39, 

R40 

2 805 

470R 

P470ACT-ND 

Digikey 

51 

R21, R22, R23, R24 

805 

4.7R 

P4.7ACT-ND 

Digikey 

Summary of Contents for IRAUDAMP4

Page 1: ...Description 4 Startup and Shutdown 12 Protection 16 Typical Performance 21 Design Documents 27 CAUTION International Rectifier suggests the following guidelines for safe operation and handling of IRAU...

Page 2: ...eping 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 Sub woofers Features...

Page 3: ...Notes Conditions THD N 1 W THD N 10 W THD N 60 W 0 005 0 002 0 004 0 002 0 001 0 003 1 kHz Single channel driven Dynamic Range 113 dB 120 dB A weighted AES 17 filter Single channel operation Residual...

Page 4: ...for CH1 CH2 OUT J4 Output for CH2 EXT CLK J8 External clock sync DCP OUT J9 DC protection relay output Power on and Power off Procedure Always apply or remove 35 V bus supplies at the same time Volum...

Page 5: ...3 which filters out the Class D switching carrier signal Figure 2 Simplified Block Diagram of Class D Amplifier Power Supplies The IRAUDAMP4 has all the necessary housekeeping power supplies onboard a...

Page 6: ...nels out of phase so that one channel consumes the energy flow from the other and does not return it to the power supply Bus voltage detection is only done on the B supply as the effect of the bus pum...

Page 7: ...nce of the IRAUDAMP4 depends on a number of different factors The section entitled Typical Performance presents performance measurements based on the overall system including the preamp and output fil...

Page 8: ...illating frequency is determined by the total delay time inside the control loop of the system The delay of the logic circuits the IRS20955 gate driver propagation delay the IRF6645 switching speed th...

Page 9: ...nterference With S3 is set to INT the two settings H and L will modify the internal clock frequency by about 20 kHz to 40 kHz either higher H or lower L The actual internal frequency is set by potenti...

Page 10: ...0 kHz to 350 kHz and then 300 kHz as the output power range where locking is achieved is extended Once locking is lost however the audio performance degrades but the increase in THD seems independent...

Page 11: ...s both the high side and low side MOSFETs are internal to the IRS20955 and the trip levels for both MOSFETs can be set independently In this design the deadtime can be selected for optimized performan...

Page 12: ...5 tolerance can be used Deadtime mode Deadtime R11 R9 DT Voltage DT1 15 ns 10k Open VCC DT2 25 ns 5 6k 4 7k 0 46 VCC DT3 35 ns 8 2k 3 3k 0 29 VCC DT4 45 ns Open 10k COM Figure 8 Deadtime Settings vs...

Page 13: ...ls have to be sequenced correctly to achieve the required click noise reduction The overall startup sequencing shutdown sequencing and shunt circuit operation are described below Click Noise Reduction...

Page 14: ...g of the voltage of CSD C3 on daughter board for CH1 of the IRS20955 is all that is required for complete sequencing The conceptual startup and shutdown timing diagrams are show in Figure 10 Figure 10...

Page 15: ...At this point normal operation begins The entire process takes less than three seconds Figure 11 Conceptual Shutdown Sequencing of Power Supplies and Audio Section Timing Shutdown sequencing is initia...

Page 16: ...milar manner as described above Once the fault is cleared the system will reset similar sequence as startup Figure 12 Conceptual Click Noise Reduction Sequencing at Trip and Reset CStart CSD External...

Page 17: ...ementation Internal Faults OCP and OTP are considered internal faults These internal faults will only shutdown the particular channel by pulling low the relevant CSD pin The channel will shutdown for...

Page 18: ...t Sensing CH1 High Side Current Sensing The high side MOSFET is protected from an overload condition and will shutdown the switching operation if the load current exceeds a preset trip level High side...

Page 19: ...Once the fault is cleared the green Normal LED will turn on There is no manual reset option Over Voltage Protection OVP OVP will shutdown the amplifier if the bus voltage between GND and B exceeds 40...

Page 20: ...he speakers This abnormal condition is rare and is likely caused when the power amplifier fails and one of the high side or low side IRF6645 DirectFET MOSFETs remain in the ON state DCP is activated i...

Page 21: ...cooling the daughter board cannot handle continuous rated power 0 0 10 0 20 0 30 0 40 0 50 0 60 0 70 0 80 0 90 0 100 0 0 20 40 60 80 100 120 140 160 180 Output Power W Power Stage Efficiency Figure 16...

Page 22: ...l unless otherwise noted Green CH1 4 2 V Output Red CH1 8 2 V Output Figure 18 Frequency Characteristics vs Load Impedance Red CH2 CH1 60 W Self Oscillator 400 kHz Green CH2 CH1 60 W Internal Clock 30...

Page 23: ...vs Frequency Green CH1 ACD B 35 V Volume gain 21 9 V V AUX 25 filter Red CH1 ACD B 35 V Volume gain 21 9 V V 3rd order RC filter Figure 21 Stand alone Class D Power Stage THD N Ratio vs Output Power...

Page 24: ...utput Power Green CH1 ACD B 35 V Volume gain 21 9 V V Blue CH1 ACD B 30 V Volume gain 21 9 V V Red CH1 ACD B 25 V Volume gain 21 9 V V Figure 23 THD N Ratio vs Output Power ACD 0 001 100 0 002 0 01 0...

Page 25: ...Ratio vs Frequency Green CH1 ACD 1 W Output Yellow CH1 ACD 10 W Output Red CH1 ACD 100 W Output Figure 25 THD N Ratio vs Frequency ACD Hz 0 0001 100 0 001 0 01 0 1 1 10 20 20k 50 100 200 500 1k 2k 5k...

Page 26: ...igure 26 Frequency Spectrum ACD Green CH1 ACD No signal Self Oscillator 400 kHz Red CH1 ACD No signal Internal Clock 300 kHz Figure 27 Residual Noise ACD Hz 140 0 120 100 80 60 40 20 d B V 10 20k 20 5...

Page 27: ...Figure 29 Typical OCP Waveforms Showing Load Current and Switch Node Voltage VS Figure 30 Typical OCP Waveforms Showing CSD Trip and Hiccup Load current CSD pin Load current VS pin CSD pin VS pin Loa...

Page 28: ...MBT5551 R125 10K R126 100K B Q109 MMBT5551 R139 47k B SD D105 1N4148 R138 4 7k B B Z106 18V Z107 18V R145 47K R146 47K Q110 MMBT5551 R144 10k D107 1N4148 D106 1N4148 C117 100uF 16V 5V R142 68k 5V R119...

Page 29: ...5 0 1uF 400V R47 10 1W CH2 O C15 33pF U3 74AHC1G04 U4 74AHC1G04 C19 2 2uF 16V C20 2 2uF 16V R27 47R R28 47R C23 0 47uF 630V C24 0 47uF 630V R29 OPEN R30 OPEN C44 OPEN R64 OPEN B 6 B 15 GND 16 B 7 CH1...

Page 30: ...uF 25V R26 10k R24 0R R22 10K C12 47pF C4 10uF 16V R20 47K CH2 O SD PWM 2 R6 8 2k D6 BAV19WDICT ND VSS2 C5 OPEN C6 OPEN C22 47nF R40 100K R37 100K Rp1 100C R34 1K R36 100K Q7 MMBT3904 Q2 MMBT5401 Rp2...

Page 31: ...SMA MURA120 MURA120T3OSCT ND Digikey 24 D101 D102 2 SOD 123 MA2YD2300 MA2YD2300LCT ND Digikey 25 HS1 1 Heat_S6in1 HEAT SINK 294 1086 ND Digikey 26 J1A J1B 2 CON EISA 31 CON EISA31 A26453 ND Digikey 27...

Page 32: ...y 72 U1 U2 2 SO 8 TLC081 296 7264 1 ND Digikey 73 U3 U4 2 SOT25 74AHC1G04 296 1089 1 ND Digikey 74 U7 U8 2 MINI5 XN01215 XN0121500LCT ND Digikey 75 U9 U10 2 SO 8 IRF7341 IRF7341 IR 76 U_1 1 SOIC16 CS3...

Page 33: ...POWER 2011 04 ND Digikey 17 Q1 Q2 2 SOT23 BCE MMBT5401 MMBT5401DICT ND Digikey 18 Q3 Q4 Q5 Q6 4 DirectFET MOSFET6645 IRF6645 IRF6645 IR 19 Q7 Q8 2 SOT23 BCE MMBT3904 MMBT3904 FDICT ND Digikey 20 R1 R2...

Page 34: ...062 in Solder mask LPI solder mask SMOBC on top and bottom layers Plating Open copper solder finish Silkscreen On top and bottom layers Daughter board Material FR4 UL 125 C Layer stack 2 Layers 1 oz...

Page 35: ...www irf com 34 RD 0617 IRAUDAMP4 PCB Layers Motherboard Figure 35 Top Layer and Pads...

Page 36: ...www irf com 35 RD 0617 Figure 36 Top Side Solder Mask and Silkscreen 4 0...

Page 37: ...www irf com 36 RD 0617 Figure 37 Bottom Layer and Pads...

Page 38: ...www irf com 37 RD 0617 Figure 38 Bottom Side Solder Mask and Silkscreen...

Page 39: ...www irf com 38 RD 0617 Daughter Board Figure 39 PCB Layout Top Layer and Pads Figure 40 PCB Layout Top Side Solder Mask and Silkscreen...

Page 40: ...www irf com 39 RD 0617 Figure 41 PCB Layout Bottom Layer and Pads Figure 42 PCB Layout Bottom Side Solder Mask and Silkscreen...

Page 41: ...www irf com 40 RD 0617 IRAUDAMP4 Mechanical Construction Motherboard Figure 43 Top Side of Motherboard Showing Component Locations...

Page 42: ...www irf com 41 RD 0617 Figure 44 Bottom Side of Motherboard Showing Component Locations...

Page 43: ...www irf com 42 RD 0617 Daughter Board Figure 45 Top Side Showing Component Locations Figure 46 Bottom Side Showing Connector Locations 03 28 2007...

Page 44: ...PCB Modify Motherboard PCB to add components change value and P N of some components remove IR logo and update revision name Details of changes 1 Change value of C19 C20 R39 and R40 2 Change P N of Z1...

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