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International Rectifier IRAUDAMP4 Скачать руководство пользователя страница 29

 

www.irf.com 

28

RD-0617 

 

 

J5

1418-ND

R5

4.7R

R13

3.3K

C11

1nF, 200V

C13

1nF, 200V

R25

100R

R29P

1K

C9

3.3uF, 50V

C23_1

OPEN

1
2

J3

277-1022

L1

22uH

R31

47K

R58
100K

R35

1K

R23

4.7R

R21

4.7R

C7

3.3uF, 50V

R37
1K

J6

1418-ND

R4

100R

R14

3.3K

D2

1N4148

D4
1N4148

C12

1nF, 200V

C14

1nF, 200V

R26

100R

R30P

1K

C10

3.3uF, 50V

R32

47K

R36

1K

R24

4.7R

R22

4.7R

C8

3.3uF, 50V

R38
1K

C32

1000uF,50V

C31

1000uF,50V

R57
100K

C27

OPEN

C24_1

OPEN

C26

0.1uF, 400V

C28

OPEN

L2
22uH

U1

TLC081

U2

TLC081

+B

-B

R48

10, 1W

D1

1N4148

D3
1N4148

R34

1K

R33

1K

C18

150pF, 500V

C17

150pF, 500V

CH1 OUT

CH2 OUT

CH2 IN

CH1 IN

1
2

J4

277-1022

C33

OPEN

C34

OPEN

R39

470R

R40

470R

R49
2.2k

ZCEN

CS

SDATAI

VD+

DGRD

SCLK

SDATAO

MUTE

AINL

AGNDR

AOUTL

VA-

VA+

AOUTR

AGNDL

AINR

U_1

CS3310

R3

100R

R1

100K

C2

2.2uF, 50V

C3

2.2uF, 50V

R2
100K

R6

4.7R

R7

47R

R8

47R

R9

10R

R10

47R

R11

47R

C1

10uF, 50V

R50

2.2k

R17

22k

R18

22k

C16

33pF

CL

K

CS

SDATAI

SCLK

MUTE

C25

0.1uF, 400V

R47

10, 1W

CH

2

 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 O

9

CH2 O

1

CH2 O

2

CH1 O

10

-B

5

CH2O

3

CH2 O

4

-B

8

CH1 O

11

CH1 O

12

+B

14

+B

13

J2

VCC

SD

GND

-5V

+5V

+5V

+5V

C5

10uF, 50V

C6

10uF, 50V

-5V

-5V

+5V

+5V

+5V

IN2

12

PWM1

3

VSS

2

VCC

10

SD

11

OT

1

VSS

8

PWM2

7

GND1

5

IN1

4

VAA

6

GND2

9

J1

CON EISA31

+5V

-5V

-5V

CH1

 O

CH2

 O

-5V

+5V

Z2

15V

C30

OPEN

SP M

U

TE

D12
1N4148

D11
1N4148

C29

OPEN

Z1

15V

R20

0R

R19

0R

R56

OPEN

R55

OPEN

R53
47K

R51

100K

R54
47K

R52

100K

CLK

CLK

1

8

2

3

5

4

6

7

U9

IRF7341

1

8

2

3

5

4

6

7

U10

IRF7341

1

2

3

J7

277-1272

D5

MURA120T3OSCT-ND

D7

MURA120T3OSCT-ND

D8

MURA120T3OSCT-ND

D6

MURA120T3OSCT-ND

-B

+B

-B

+B

-B

+B

CH1

 O

CS

SDATAI

SD

SP Mute

SP Mute

Earth

C43

OPEN

R63

OPEN

C41

OPEN

R61

OPEN

C46

OPEN

R66

OPEN

C42

OPEN

R62

OPEN

C48

OPEN

R68

OPEN

C45

OPEN

R65

OPEN

C47

OPEN

R67

OPEN

C49

OPEN

R69

OPEN

C40

OPEN

R60

OPEN

IRAUDAMP VER.4 - PREAMP AND POWER STAGE

OT

5

1

3

2

4

U7

XN01215

5

1

3

2

4

U8

XN01215

R72

OPEN

R71

OPEN

 

 

Figure 32.  Audio Channels 1 and 2 

Содержание IRAUDAMP4

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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

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

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

Страница 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...

Страница 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...

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

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

Страница 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...

Страница 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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