Modular expandable power amplifier with TDA7293 / TDA7294s.eeweb.com/members/leslie_perjes/projects/2011/12/14/TDA-Modular... · 3 - Modular poweramp with TDA7293 and TDA7294 Document

Modular expandable power amplifier with TDA7293 / TDA7294

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

3 - Modular poweramp with TDA7293 and TDA7294

Document last modified and saved: 13 December 2011 4:21 PM

Schematics and Bill of materials for TDA amplifierSchematic and BOM of first (main) module

Schematics and BOM for modular TDA7293 amplifier

Schematics and BOM for modular TDA7293 amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Schematic and BOM of first (main) module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Schematic and BOM of second (bridge) module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Schematic and BOM of third (parallel) module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Schematic and BOM of speaker protection module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Three modes of TDA7293 from the official datasheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Simplified schematic of bridged and paralleled modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Connections between single, bridge and parallel modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Variations between main, bridge, and parallel modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

PCB for modular expandable TDA amplifier project . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13PCB of main module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14PCB of bridge module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15PCB of parallel module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16PCB of speaker protection module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Examples how to connect modules and build instrument amplifiers . . . . . . . . . . . . . . . . . . . .18Mono bridge, single and parallel, — stereo bridge and single amp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Stereo bridge + parallel, — mono bridge + doubled parallel amp with speaker protection . . . . . . . . . . . . . . . . . . . . 20

This project made for very simple and popular homemade amplifier instrument amplification . The gainclone called TDA7293 and 7294 is very good solution for guitar or microphone amplifiers . The poweramp can be connected to bridge, parallel, and bridge+parallel mode . This project contains 3 different PCBs for this integrated MOSFET

amplifier, and one PCB for speaker protection . Very easy to build, the output power is from 75W to 300W with one channel, but with this project possible to build stereo application . Popular guitar amplifier makers like Marshall and

Carlsbro using TDA729x ICs for combos and guitar heads .

English blog and PCB order: http://custompcb.blogspot.com/Hungarian blog and PCB order: http://diyguitarpa.blogspot.com/

The Youtube Channel • Picasa gallery • Email: [email protected]

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/12/2011 Sheet ofFile: D:\!Works\..\TDA7293.SchDoc Drawn By:

TDA7293

STB-GND1

- IN2

+ IN3Slave GND 4

Clip Det. 5

Bootstrap 6

+V Sig

7-V Sig

8

STBY 9

Mute 10

Buff. Drv.11Bootst. Loader 12

+V Pow

er13

Out 14

-V Pow

er15

U1

1000u 60VC2

1000u 60VC8

GND

GND

220nC1

220n

C9

22uC6

22kR7

680R1

GND

22kR6

GND

GND GND

10uC5

3 inp

ut co

nnec

tor

1

2

3

Conn1

GND

GND

10uC3

10uC4

GND GND

10kR3

22kR4

GND

+ V

- V

3 inp

ut co

nnec

tor

1

2

3

Conn6

GND

Out -

Out +

In 1

Buff. Drv.

22u

C7

30kR2

1N4148

D1

22kR5

220 R10BC212

T1 82k R9

6.8k

R8

1

2

2 inp

ut co

nnec

tor

Conn7

GND

3 inp

ut co

nnec

tor

1

2

3

Conn5

22uC10

TDA 7293/7294 Stage 1 (main module)

http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/

123456789

10

15x1

pin

conn

ector

1112131415

Conn4

123456789

10

15x1

pin

conn

ector

1112131415

Conn2

GND

Out -

Br. I/OSTBYMute- V+ V

B.S.B.L.

B.L. B.S.

MuteSTBY

In 2

56kR11

Bill of MaterialsTDA7293.SchDoc 12/12/2011 16:20:00

Comment Footprint Value Quantity Pins Designator Price Total PriceH Total HConnector 2 pin connector 100mil 2 input connector 1 2 Conn7 #VALUE! 20 20 Ft

Cap CAP, 2 and 3 MIL 22u 1 2 C7 #VALUE! #VALUE!

Cap Cap, Tantal, 1mil 10u 1 2 C5 #VALUE! #VALUE!

NonPolarized Cap CAP, WIMA, 2MIL 220n 2 2 C1, C9 #VALUE! #VALUE!

Diode Diode 1N4148 1 2 D1 #VALUE! 2 2 Ft

Cap Elco 12 mm, 2 mil pins 1000u 60V 2 2 C2, C8 #VALUE! #VALUE!

Cap Elco 6mm, 1 mil pins 10u 2 2 C3, C4 #VALUE! #VALUE!


Header 15 pin Female connector FHSHR 15 15x1 pin connector 2 15 Conn2, Conn4 #VALUE! 10 20 Ft

Connector Panel Connector 3 input Small 3 input connector 3 3 Conn1, Conn5, Conn6 #VALUE! 44 132 Ft

Resistor Resistor 300mil 10k 1 2 R3 #VALUE! 2 2 Ft

Resistor Resistor 300mil 220 1 2 R10 #VALUE! 2 2 Ft

Resistor Resistor 300mil 22k 4 2 R4, R5, R6, R7 #VALUE! 2 8 Ft



Resistor Resistor 300mil 6.8k 1 2 R8 #VALUE! 2 2 Ft



TDA7293 TDA7293 TDA7293 1 15 U1 #VALUE! #VALUE!

PNP Transistor TO92 BC212 1 3 T1 #VALUE! #VALUE!

30 SUM: #VALUE! #VALUE!

Notes

This is the first and the most important module of this project . This module can be used alone for 1x75W or 2x75W amplification . The commercial amplifi-ers says 100W for this circuit what is not true . The output power is 70—75w with 4 Ohm speakers, and about 40–50w with 8 Ohm speakers . The maximum power supply is ±50V, but ±47V recommend-ed . The max . power of circuit called 7294 is ±40V, with the 7293 possible to use ±50V . If you need more power, don’t increase the power supply, use bridge or parallel configuration instead . This module useful for both 7294 and 7293 . Only one thing must be changed, the C6 and C7 capacitor . For 7294 use ONLY C6 between output and Bootstrap pin, for 7293 use ONLY C7 between pin 6 and pin 12 . Use this rule for all other modules .

Conn1: Power supply, ±47V for 7293, ±40V for 7294Conn5: Left and Right audio level inputsConn7: Clipping LED connectorConn6: Simple (GND and Out+) and bridge

(Out+ and Out-) mode speaker outputs .

http://custompcb.blogspot.com/

http://diyguitarpa.blogspot.com/

http://www.youtube.com/playlist?list=PLDBAFF83D547F7EB7&feature=viewall

http://picasaweb.google.com/gitarfogas

mailto:gitarfogas%40gmail.com?subject=PDF%20Message%20-%20EQ%20Project

Modular poweramp with TDA7293 and TDA7294 - 4 5 - Modular poweramp with TDA7293 and TDA7294


Schematics and Bill of materials for TDA amplifierSchematic and BOM of second (bridge) module

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/12/2011 Sheet ofFile: D:\!Works\..\TDA7293-BR-MOD.SchDocDrawn By:

TDA7293

STB-GND1

- IN2

+ IN3Slave GND 4

Clip Det. 5

Bootstrap 6

+V Sig

7-V Sig

8

STBY 9

Mute 10


+V Pow

er13

Out 14

-V Pow

er15

U1

1000u 60VC2

1000u 60VC8

GND

GND

220nC1

220n

C9

22uC6

22kR7

680R1

GND

22kR6

GND

GND GND

10u

C5

GND

+ V

- V

22u

C7

GND

GND

22uC3

TDA 7293/7294 Stage 2 (bridge module)


Out -

123456789

10

15x1

pin

conn

ector

1112131415

Conn4

123456789

10

15x1

pin

conn

ector

1112131415

Conn5

B.S.B.L.

B.L. B.S.

56k

R2

Bill of MaterialsTDA7293-BR-MOD.SchDoc 12/12/2011 16:12:03

Comment Footprint Value Quantity Pins Designator Price Total PriceH Total HCap CAP, 2 and 3 MIL 22u 1 2 C7 #VALUE! #VALUE!

Cap Cap, Tantal, 1mil 10u 1 2 C5 #VALUE! #VALUE!




Header 15 pin Female connector FHSHR 15 15x1 pin connector 1 15 Conn5 #VALUE! 10 10 Ft

Header 15 pin Male connector PHSR-15 (T-T) 15x1 pin connector 1 15 Conn4 #VALUE! 10 10 Ft

Resistor Resistor 300mil 22k 2 2 R6, R7 #VALUE! 2 4 Ft





Altium Limited Confidential 12/12/2011 Page 1

Notes

This is the bridge module of this project . This mod-ule can be connected to the right side of first (main) circuit . This module dupli-cate the output power with 8 ohm speakers . 4 Ohm speakers cannot be used with bridge amplifier .

Schematics and Bill of materials for TDA amplifierSchematic and BOM of third (parallel) module

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/13/2011 Sheet ofFile: D:\!Works\..\TDA7293-PAR-MOD.SchDocDrawn By:

TDA7293

STB-GND1

- IN2

+ IN3Slave GND 4

Clip Det. 5

Bootstrap 6

+V Sig

7-V Sig

8

STBY 9

Mute 10


+V Pow

er13

Out 14

-V Pow

er15

U1

1000u 60VC2

1000u 60VC8

GND

GND

220nC1

220n

C9

GND

+ V

- V

GND

GND

22u

C7

TDA 7293/7294 Stage 3 (paralel module)


123456789

10

15x1

pin

conn

ector

1112131415

Conn1

123456789

10

15x1

pin

conn

ector

1112131415

Conn2

B.S.B.L.

Out +/-

B.L.

B.S.

56k

R6

B.S.B.L.

Bill of MaterialsTDA7293-PAR-MOD.SchDoc 12/12/2011 16:20:58

Comment Footprint Value Quantity Pins Designator Price Total PriceH Total HCap CAP, 2 and 3 MIL 22u 1 2 C7 #VALUE! #VALUE!



Header 15 pin Female connector FHSHR 15 15x1 pin connector 1 15 Conn2 #VALUE! 10 10 Ft

Header 15 pin Male connector PHSR-15 (T-T) 15x1 pin connector 1 15 Conn1 #VALUE! 10 10 Ft




Altium Limited Confidential 12/12/2011 Page 1

Notes

This is the parallel module of this amplifier project . This mode can be con-nected to the right side of first (main) module to use with 4 ohm speakers, or can be connected to the second (bridge) module to use bridged amp with 4 ohm too . For parallel amplification use only TDA7293 only .

This module can be connected to the first (main) module, to the second (bridged) module, and if you need more power, can be connected to the first parallel module on the system to increase the output current.



1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/12/2011 Sheet ofFile: D:\!Works\..\Amp-Protection.SchDoc Drawn By:

11

UPC1237

22

33

44

55

66

77

88

U1

330uC1

GND

9.2k

R9

1N4148

D3

4.7uC4

GND

56k R7

6.8kR8

GND

10R2

22nC3

GND

1N4148

D2

35

1

46

2

7 8

Rel1

1 2 2 input connectorConn1

GND22k

R1

1 2 2 input connectorConn2

GND

1N4148D1

GND

123456789

10

15x1

pin con

nector

1112131415

Conn3

123456789

10

15x1

pin

conn

ector

1112131415

Conn4

33uC2

GND

GND

GND

3 input connector1 2 3

Conn5

GND

Dual Speker protection module


AC 24V+24V

In2

Bill of MaterialsAmp-Protection.SchDoc 12/12/2011 16:18:00

Comment Footprint Value Quantity Pins Designator Price Total PriceH Total HConnector 2 pin connector 100mil 2 input connector 1 2 Conn1 #VALUE! 20 20 Ft

NonPolarized Cap CAP, Ceramic, 1MIL 22n 1 2 C3 #VALUE! #VALUE!

Diode Diode 1N4148 3 2 D1, D2, D3 #VALUE! 2 6 Ft

Cap Elco 12 mm, 2 mil pins 330u 1 2 C1 #VALUE! #VALUE!

Cap Elco 6mm, 1 mil pins 33u 1 2 C2 #VALUE! #VALUE!

Cap Elco 6mm, 1 mil pins 4.7u 1 2 C4 #VALUE! #VALUE!

Header 15 pin Male connector PHSR-15 (T-T) 15x1 pin connector 2 15 Conn3, Conn4 #VALUE! 10 20 Ft

Connector Panel Connector 2 input Small 2 input connector 1 2 Conn2 #VALUE! 20 20 Ft

Connector Panel Connector 3 input Small 3 input connector 1 3 Conn5 #VALUE! 44 44 Ft

Relay 2 Relay RE2L 24V DC 1 8 Rel1 #VALUE! #VALUE!






UPC1237 UPC1237 1 8 U1 #VALUE! #VALUE!


Notes

This is very simple and optional module for all configuration of this amplifier project . This module possible to use for all one channel mono and all two channels stereo configura-tions . This module (if used) must be connected between left and right channels . Connect the left side connector of speaker protection to the last module of left channel, connect right side connector to the first module of the main module of right channel . The Conn5 is used for 24V DC power, and for 24V AC input of UPC1237 . Conn1 is the LED connector for protection checking . Conn2 is for the high current relays, connect or disconnect the speakers from speaker outputs .

Schematics and Bill of materials for TDA amplifierSchematic and BOM of speaker protection module

Schematics and Bill of materials for TDA amplifierThree modes of TDA7293 from the official datasheet

Simple 7293 or 7294:

TDA7293

120V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY

VERY HIGH OPERATING VOLTAGE RANGE(±50V)DMOS POWER STAGEHIGH OUTPUT POWER (100W @ THD =10%, RL = 8Ω, VS = ±40V)MUTING/STAND-BY FUNCTIONSNO SWITCH ON/OFF NOISEVERY LOW DISTORTIONVERY LOW NOISESHORT CIRCUIT PROTECTIONTHERMAL SHUTDOWNCLIP DETECTORMODULARITY (MORE DEVICES CAN BEEASILY CONNECTED IN PARALLEL TODRIVE VERY LOW IMPEDANCES)

DESCRIPTIONThe TDA7293 is a monolithic integrated circuit inMultiwatt15 package, intended for use as audioclass AB amplifier in Hi-Fi field applications(Home Stereo, self powered loudspeakers, Top-

class TV). Thanks to the wide voltage range andto the high out current capability it is able to sup-ply the highest power into both 4Ω and 8Ω loads.The built in muting function with turn on delaysimplifies the remote operation avoiding switchingon-off noises.Parallel mode is made possible by connectingmore device through of pin11. High output powercan be delivered to very low impedance loads, sooptimizing the thermal dissipation of the system.

December1999

IN- 2R2

680Ω

C222µF

C1 470nFIN+

R1 22K

3

R3 22K

-

+

MUTE

STBY

4

VMUTE

VSTBY

10

9

SGND

MUTE

STBY

R4 22K

THERMALSHUTDOWN

S/CPROTECTION

R5 10K

C3 10µF C4 10µF

1

STBY-GND

C522µF

7 13

14

6

158

-Vs -PWVs

BOOTSTRAP

OUT

+PWVs+Vs

C9 100nF C8 1000µF

-VsD97AU805A

+VsC7 100nF C6 1000µF

BUFFER DRIVER

11

BOOTLOADER12

5VCLIP

CLIP DET

(*)

(*) see Application note(**) for SLAVE function

(**)

Figure 1: Typical Application and Test Circuit

Multiwatt15ORDERING NUMBER: TDA7293V

MULTIPOWER BCD TECHNOLOGY

1/13

Parallel with 7293:

IN- 2R2

680Ω

C222µF

C1 470nFIN+

R1 22K

3

R3 22K

-

+

MUTE

STBY

4

10

9

SGND

MUTE

STBY

R4 22K

THERMALSHUTDOWN

S/CPROTECTION

R5 10K

C3 10µF

C4 10µF

1

STBY-GND

C547µF

7 13

14

6

158

-Vs -PWVs

BOOTSTRAP

OUT

+PWVs+Vs

C9 100nF C8 1000µF

-Vs

D97AU808C

+VsC7 100nF C6 1000µF

BUFFERDRIVER

11

BOOTLOADER12

IN- 2

IN+ 3

-

+

MUTE

STBY

4

10

9

SGND

MUTE

THERMALSHUTDOWN

S/CPROTECTION

1

STBY-GND

7 13

14

6

158

-Vs -PWVs

BOOTSTRAP

OUT

+PWVs+Vs

C9 100nF C8 1000µF

-Vs

+VsC7 100nF C6 1000µF

BUFFERDRIVER

11

BOOTLOADER12

5CLIP DET

5

MASTER

SLAVE

C10100nF

R72Ω

VMUTE

VSTBY

STBY

Figure 7: Modular Application Circuit

Figure 6b: PCB - Solder Side of the fig. 6.

TDA7293

10/13

Bridge with 7293 and 7294:

BRIDGE APPLICATIONAnother application suggestion is the BRIDGEconfiguration, where two TDA7294 are used, asshown by the schematic diagram of figure 25.In this application, the value of the load must notbe lower than 8 Ohm for dissipation and currentcapability reasons.A suitable field of application includes HI-FI/TVsubwoofers realizations.The main advantages offered by this solution are:

- High power performances with limited supply voltage level.- Considerably high output power even with high load values (i.e. 16 Ohm).The characteristics shown by figures 27 and 28,measured with loads respectively 8 Ohm and 16Ohm.With Rl= 8 Ohm, Vs = ±25V the maximum outputpower obtainable is 150 W, while with Rl=16Ohm, Vs = ±35V the maximum Pout is 170 W.

22K0.56µF

2200µF0.22µF

TDA7294

+

-

22µF

22K

680

22K

3

1

4

137

+Vs

Vi

815

2

14

6

10 9

+

-

3

0.56µF 22K

1

4

2

14

622µF

22K

680

10 9

22µF

15 8

-Vs2200µF 0.22µF

22µF

20K

10K 30K

1N4148

ST-BY/MUTE

TDA7294

137

D93AU015A

Figure 25: Bridge Application Circuit

TDA7294

13/17

For 7293:

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value UnitVS Supply Voltage (No Signal) ±60 VV1 VSTAND-BY GND Voltage Referred to -VS (pin 8) 90 VV2 Input Voltage (inverting) Referred to -VS 90 V

V2 - V3 Maximum Differential Inputs ±30 VV3 Input Voltage (non inverting) Referred to -VS 90 VV4 Signal GND Voltage Referred to -VS 90 VV5 Clip Detector Voltage Referred to -VS 120 VV6 Bootstrap Voltage Referred to -VS 120 VV9 Stand-by Voltage Referred to -VS 120 VV10 Mute Voltage Referred to -VS 120 VV11 Buffer Voltage Referred to -VS 120 VV12 Bootstrap Loader Voltage Referred to -VS 100 VIO Output Peak Current 10 A

Ptot Power Dissipation Tcase = 70°C 50 WTop Operating Ambient Temperature Range 0 to 70 °C

Tstg, Tj Storage and Junction Temperature 150 °C

1

2

3

4

5

6

7

9

10

11

8

BUFFER DRIVER

MUTE

STAND-BY

-VS (SIGNAL)

+VS (SIGNAL)

BOOTSTRAP

CLIP AND SHORT CIRCUIT DETECTOR

SIGNAL GROUND

NON INVERTING INPUT

INVERTING INPUT

STAND-BY GND

TAB CONNECTED TO PIN 8

13

14

15

12

-VS (POWER)

OUT

+VS (POWER)

BOOTSTRAP LOADER

D97AU806

PIN CONNECTION (Top view)

QUICK REFERENCE DATA

Symbol Parameter Test Conditions Min. Typ. Max. UnitVS Supply Voltage Operating ±12 æ 50 V

GLOOP Closed Loop Gain 26 40 dB

PtotOutput Power VS = ±45V; RL = 8Ω; THD = 10% 140 W

VS = ±30V; RL = 4Ω; THD = 10% 110 WSVR Supply Voltage Rejection 75 dB

THERMAL DATA

Symbol Description Typ Max UnitRth j-case Thermal Resistance Junction-case 1 1.5 °C/W

TDA7293

2/13

For 7294:

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value UnitVS Supply Voltage (No Signal) ±50 VIO Output Peak Current 10 A

Ptot Power Dissipation Tcase = 70°C 50 WTop Operating Ambient Temperature Range 0 to 70 °C

Tstg, Tj Storage and Junction Temperature 150 °C

TAB connected to -VS

PIN CONNECTION (Top view)

TDA7294

2/17



Schematics and Bill of materials for TDA amplifierSimplified schematic of bridged and paralleled modes

Paralleled mode

Bridged+paralleled mode

Bridged mode



1 1

2 2

3 3

4 4

5 5

6 6

DD

CC

BB

AA

Title

Num

berRevision

Size

A4

Date:

12/12/2011Sheet of

File:D:\!W

orks\..\Amp-P

rotection.SchD

ocDraw

n By:

11

UPC1237

22

33

44

55

66

77

88

U1

330uC1

GND

9.2k

R9

1N4148

D3

4.7uC4

GND

56kR7

6.8kR8

GND

10 R222nC3

GND

1N4148

D2

351

462

78

Rel1

1

2

2 input connectorConn1

GND

22k

R1

1

2

2 input connectorConn2

GND

1N4148D1

GND

1 2 3 4 5 6 7 8 9 10

15x1 pin connector

11 12 13 14 15

Conn31 2 3 4 5 6 7 8 9 10

15x1 pin connector

11 12 13 14 15

Conn4

33uC2

GND

GND

GND

3 input connector

1

2

3Conn5

GND

Dual Speker protection m

odule

http://diyguitarpa.blogspot.com/

http://custompcb.blogspot.com

/

AC 24V

+24V

In2

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/12/2011 Sheet ofFile: D:\!Works\..\TDA7293-BR-MOD.SchDocDrawn By:

TDA7293

STB-GND1

- IN2

+ IN3Slave GND 4

Clip Det. 5

Bootstrap 6

+V Sig

7-V Sig

8

STBY 9

Mute 10


+V Pow

er13

Out 14

-V Pow

er15

U1

1000u 60VC2

1000u 60VC8

GND

GND

220nC1

220n

C9

22uC6

22kR7

680R1

GND

22kR6

GND

GND GND

10u

C5

GND

+ V

- V

22u

C7

GND

GND

22uC3

TDA 7293/7294 Stage 2 (bridge module)


Out -

123456789

10

15x1

pin

conn

ector

1112131415

Conn4

123456789

10

15x1

pin

conn

ector

1112131415

Conn5

B.S.B.L.

B.L. B.S.

56k

R2

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/13/2011 Sheet ofFile: D:\!Works\..\TDA7293-PAR-MOD.SchDocDrawn By:

TDA7293

STB-GND1

- IN2

+ IN3Slave GND 4

Clip Det. 5

Bootstrap 6

+V Sig

7-V Sig

8

STBY 9

Mute 10


+V Pow

er13

Out 14

-V Pow

er15

U1

1000u 60VC2

1000u 60VC8

GND

GND

220nC1

220n

C9

GND

+ V

- V

GND

GND

22u

C7

TDA 7293/7294 Stage 3 (paralel module)


123456789

10

15x1

pin

conn

ector

1112131415

Conn1

123456789

10

15x1

pin

conn

ector

1112131415

Conn2

B.S.B.L.

Out +/-

B.L.

B.S.

56k

R6

B.S.B.L.

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

A4

Date: 12/12/2011 Sheet ofFile: D:\!Works\..\TDA7293.SchDoc Drawn By:

TDA7293

STB-GND1

- IN2

+ IN3Slave GND 4

Clip Det. 5

Bootstrap 6

+V Sig

7-V Sig

8

STBY 9

Mute 10


+V Pow

er13

Out 14

-V Pow

er15

U1

1000u 60VC2

1000u 60VC8

GND

GND

220nC1

220n

C9

22uC6

22kR7

680R1

GND

22kR6

GND

GND GND

10uC5

3 inp

ut co

nnec

tor

1

2

3

Conn1

GND

GND

10uC3

10uC4

GND GND

10kR3

22kR4

GND

+ V

- V

3 inp

ut co

nnec

tor

1

2

3

Conn6

GND

Out -

Out +

In 1

Buff. Drv.

22u

C7

30kR2

1N4148

D1

22kR5

220 R10BC212

T1 82k R9

6.8k

R8

1

2

2 inp

ut co

nnec

tor

Conn7

GND

3 inp

ut co

nnec

tor

1

2

3

Conn5

22uC10

TDA 7293/7294 Stage 1 (main module)


123456789

10

15x1

pin

conn

ector

1112131415

Conn4

123456789

10

15x1

pin

conn

ector

1112131415

Conn2

GND

Out -

Br. I/OSTBYMute- V+ V

B.S.B.L.

B.L. B.S.

MuteSTBY

In 2

56kR11

Schematics and Bill of materials for TDA amplifierConnections between single, bridge and parallel modes

Notes

Blue lines: connections between main module and bridge module, one con-nection required between parallel mod-ule and bridged module .Green lines: connection between main module and parallel module, and be-tween bridge module and parallel mod-ule .Yellow lines: Connection between all modules and speaker protection .Red lines: Input for all channels, the dot-ted line is for second channel if the full configuration is stereo .

Input connectors for another modules:• Conn4 on Main module• Conn5 on Bridge module• Conn2 on parallel module



Schematics and Bill of materials for TDA amplifierVariations between main, bridge, and parallel modules

Bridge application:

1) - 1 TDA729x IC paralleled / bridge

2) - 2 TDA729x IC paralleled / bridge

Single application:

1) - 1 TDA729x IC paralleled

2) - 2 TDA729x IC paralleled

One channel (mono) applications:

• About 75-80W:1. Main module only2. Main module and speaker protection

• About 150-200W on 8 Ohm:1. Main module and Bridge module2. Main module, Bridge module and speaker

protection

• About 120W on 4 Ohm:1. Main module, parallel module2. Main module, parallel module and speaker

protection

• About 180W on 4 Ohm:1. Main module, and 2 parallel module2. Main module, 2 parallel module, and

speaker protection

• About 220W on 8 Ohm:1. Main module, 1 parallel module, bridge

module and 1 parallel module2. Main module, 1 parallel module, bridge

module, 1 parallel module and speaker protection

• About 300W on 4 Ohm:1. Main module, 2 parallel module, bridge

module and 2 parallel module2. Main module, 2 parallel module, bridge

module, 2 parallel module and speaker protection

Two channel (stereo) applications:

• About 2x75-80W:1. Main module, speaker protection, main

module

• About 2x150-200W on 8 Ohm:1. Main module and Bridge module, speaker

protection, main module, bridge module

• About 2x120W on 4 Ohm:1. Main module, parallel module, speaker

protection, main module, parallel module

• About 2x180W on 4 Ohm:1. Main module, and 2 parallel module,

speaker protection, main module, 2 parallel module

• About 2x220W on 8 Ohm:1. Main module, 1 parallel module, bridge

module and 1 parallel module, speker protection, main module, 1 parallel module, bridge module and 1 parallel module

• About 2x300W on 4 Ohm:1. Main module, 2 parallel module, bridge

module and 2 parallel module, speaker protection, main module, 2 parallel module, bridge module and 2 parallel module

PCB for modular expandable

TDA amplifier project



PCB for TDA729x amplifier projectPCB of main module

PCB for TDA729x amplifier projectPCB of bridge module

31

C2

R1

R6

U1

R2

C8C1

R4 D1C7

T1

R9

R8

R10

R11

Conn6

Conn5

Conn1

C6

C3

C9

C4

R5

C10

R7

R3

C5

Conn7

Conn2

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

TOP LAYER TOP LAYERBOTTOM LAYER BOTTOM LAYER

OVERLAY ON TOP LAYER

OV

ER

LAY

ON

TO

P LA

YE

R

Notes

This module can be used alone for mono - or with speaker protection - for ste-reo amplifiers . This is the first module for all possible configurations . Conn4 can be connected to the right side of speaker protection only, Conn2 is the input of bridge, parallel or speaker protection modules . Notes

This is the bridge mod-ule of this project . This module can be con-nected to the right side of first (main) module only . This module du-plicate the output pow-er with 8 ohm speak-ers . 4 Ohm speakers cannot be used with bridge amplifier if par-allel modules not used .



PCB for TDA729x amplifier projectPCB of parallel module

PCB for TDA729x amplifier projectPCB of speaker protection module

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

R1

R8

R7

C2

U1 R2R9

C1

C4

Conn5

D1

C3

Conn1Conn2

D2Rel1

D3

Conn4

TOP LAYER TOP LAYERBOTTOM LAYER BOTTOM LAYER

OV

ER

LAY

ON

TO

P LA

YE

R

OV

ER

LAY

ON

TO

P LA

YE

R

Notes

This is very simple, cheap and optional module for all configuration of this amplifier project with UPC1237 . This module possible to use for all one channel mono and all two channels stereo configura-tions . This module (if used) must be connected between the last module of left channel and the first (main) module of right channel . Otherworld, the left side connector (Conn3) of speaker protection must be connected to the last module (main, bridge or parallel) of left channel, and the right side con-nector (Conn4) must be connected to the (first) main module of right channel .

Notes

This is the parallel mod-ule of this amplifier pro-ject . This mode can be connected to the right side of first (main) mod-ule to use with 4 ohm speakers, or can be connected to the sec-ond (bridge) module to use bridged amp with 4 ohm speakers instead of 8 . For parallel amplifica-tion use only TDA7293 only . This module can be duplicated on sin-gle or bridged con-figurations after main or bridged module to increase the maxi-mum output current . It’s mean, this module can be connected to the previous parallel mod-ule as second parallel output .



3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

Examples how to connect modules and build instrument

amplifiers

Examples for modular amplifiersMono bridge, single and parallel, — stereo bridge and single amp

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

R1

R8

R7

C2

U1 R2R9

C1

C4

Conn5

D1

C3

Conn1Conn2

D2Rel1

D3

Conn4

R1

R8

R7

C2

U1 R2R9

C1

C4

Conn5

D1

C3

Conn1Conn2

D2Rel1

D3

Conn4

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

Mono bridge

Mono single Stereo single

Stereo bridge

Mono parallel

Main module

Main module

Main module

Main module Main module

Speaker protection

Speaker protection

Main module

Main module

Bridge module

Bridge module

Bridge module

Parallel module



3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

3 1

C2

R1

R6

U1

R2

C8

C1

R4D1C7

T1

R9R8 R10 R11

Conn6 Conn5 Conn1

C6C3

C9C4

R5C10

R7 R3C5

Conn7

Conn2

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

C9

C7

C6

R6R7

C2

U1

R2

C8

C3

R1

C1C5

Conn4 Conn5

R1

R8

R7

C2

U1 R2R9

C1

C4

Conn5

D1

C3

Conn1Conn2

D2Rel1

D3

Conn4

R1

R8

R7

C2

U1 R2R9

C1

C4

Conn5

D1

C3

Conn1Conn2

D2Rel1

D3

Conn4

Stereo bridge + parallel

Mono bridge + doubled parallel amplifier with speaker protection

Main module

Main module

Main module

Speaker protection

Speaker protection

Bridge module

Bridge module

Bridge module

Examples for modular amplifiersStereo bridge + parallel, — mono bridge + doubled parallel amp with

speaker protection

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

C7

C8

R6

C1

C2

U1

C9

Conn2Conn1

Parallel module

Parallel module

Parallel module

Parallel module

Parallel module

Parallel module

Parallel module

Parallel module

English blog and PCB order: http://custompcb.blogspot.com/Hungarian blog and PCB order: http://diyguitarpa.blogspot.com/

The Youtube Channel • Picasa gallery • Email: [email protected]

Documents

Modular expandable power amplifier with TDA7293 / TDA7294s.eeweb.com/members/leslie_perjes/projects/2011/12/14/TDA-Modular... · 3 - Modular poweramp with TDA7293 and TDA7294 Document