Modular expandable power amplifier with TDA7293 / TDA7294
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Transcript of Modular expandable power amplifier with TDA7293 / TDA7294
Modular expandable power amplifier with TDA7293 / TDA7294
C9
C6
R6R7
C8
U1
C2
C3
R1
C1C5
R2
Conn4 Conn5
3 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 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
More power with parallel modules up to 800W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22More power with 3 parallel modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Speaker protection schematic with PWM fan controller V:1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Speaker protection PCB with PWM fan controller V:1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Speaker protection schematic with PWM fan controller V:2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Speaker protection PCB with PWM fan controller V:2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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]
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D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 1/22/2012 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
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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!
Cap Elco 6mm, 1 mil pins 22u 2 2 C6, C10 #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 30k 1 2 R2 #VALUE! 2 2 Ft
Resistor Resistor 300mil 56k 1 2 R11 #VALUE! 2 2 Ft
Resistor Resistor 300mil 6.8k 1 2 R8 #VALUE! 2 2 Ft
Resistor Resistor 300mil 680 1 2 R1 #VALUE! 2 2 Ft
Resistor Resistor 300mil 82k 1 2 R9 #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 .
Modular poweramp with TDA7293 and TDA7294 - 4 5 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
Schematics and Bill of materials for TDA amplifierSchematic and BOM of second (bridge) module
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D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 1/22/2012 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
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
10u
C5
GND
+ V
- V
22u
C7
GND
GND
22uC3
TDA 7293/7294 Stage 2 (bridge module)
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
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!
NonPolarized Cap CAP, WIMA, 2MIL 220n 2 2 C1, C9 #VALUE! #VALUE!
Cap Elco 12 mm, 2 mil pins 1000u 60V 2 2 C2, C8 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 22u 2 2 C3, C6 #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
Resistor Resistor 300mil 56k 1 2 R2 #VALUE! 2 2 Ft
Resistor Resistor 300mil 680 1 2 R1 #VALUE! 2 2 Ft
TDA7293 TDA7293 TDA7293 1 15 U1 #VALUE! #VALUE!
15 SUM: #VALUE! #VALUE!
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
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Date: 1/22/2012 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
Buff. Drv.11Bootst. Loader 12
+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)
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
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!
NonPolarized Cap CAP, WIMA, 2MIL 220n 2 2 C1, C9 #VALUE! #VALUE!
Cap Elco 12 mm, 2 mil pins 1000u 60V 2 2 C2, C8 #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
Resistor Resistor 300mil 56k 1 2 R6 #VALUE! 2 2 Ft
TDA7293 TDA7293 TDA7293 1 15 U1 #VALUE! #VALUE!
9 SUM: #VALUE! #VALUE!
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.
Modular poweramp with TDA7293 and TDA7294 - 6 7 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
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Date: 12/12/2011 Sheet ofFile: D:\!Works\..\Amp-Protection.SchDoc Drawn By:
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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
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15x1
pin con
nector
1112131415
Conn3
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pin
conn
ector
1112131415
Conn4
33uC2
GND
GND
GND
3 input connector1 2 3
Conn5
GND
Dual Speker protection module
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
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!
Resistor Resistor 300mil 10 1 2 R2 #VALUE! 2 2 Ft
Resistor Resistor 300mil 22k 1 2 R1 #VALUE! 2 2 Ft
Resistor Resistor 300mil 56k 1 2 R7 #VALUE! 2 2 Ft
Resistor Resistor 300mil 6.8k 1 2 R8 #VALUE! 2 2 Ft
Resistor Resistor 300mil 9.2k 1 2 R9 #VALUE! 2 2 Ft
UPC1237 UPC1237 1 8 U1 #VALUE! #VALUE!
19 SUM: #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 .
Warning
Make sure to use the schematic from the datasheet from 2003 . Slave mode is activated by pulling IN+, IN- and SGND to -Vs, the negative supply! In older versions from 1999 of the schematic slave mode is NOT activated prop-erly, which may lead according to reports on the internet to the destruction of the chip .
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
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
D97AU808D
+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
10/15
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
Modular poweramp with TDA7293 and TDA7294 - 8 9 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
Schematics and Bill of materials for TDA amplifierSimplified schematic of bridged and paralleled modes
Paralleled mode
Bridged+paralleled mode
Bridged mode
Modular poweramp with TDA7293 and TDA7294 - 10 11 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
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: 1/22/2012 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
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
10u
C5
GND
+ V
- V
22u
C7
GND
GND
22uC3
TDA 7293/7294 Stage 2 (bridge module)
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
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: 1/22/2012 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
Buff. Drv.11Bootst. Loader 12
+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)
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
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: 1/22/2012 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
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
Modular poweramp with TDA7293 and TDA7294 - 12 13 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
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
Modular poweramp with TDA7293 and TDA7294 - 14 15 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
PCB for TDA729x amplifier projectPCB of main module
PCB for TDA729x amplifier projectPCB of bridge module
1 3
C2
C5
C4R1
U1
C8
R8
C1
T1
D1R2
C9
R4
R10
R11
Conn1
Conn5
C3
C10
C6Conn2
Conn7
R9
R3
R5
R6
R7
Conn6 C9
C6
R6R7
C8
U1
C2
C3
R1
C1C5
R2
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 .
Modular poweramp with TDA7293 and TDA7294 - 16 17 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
PCB for TDA729x amplifier projectPCB of parallel module
PCB for TDA729x amplifier projectPCB of speaker protection module
R6
C8
C2
C9
U1
C1
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 .
Modular poweramp with TDA7293 and TDA7294 - 18 19 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
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
Modular poweramp with TDA7293 and TDA7294 - 20 21 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
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
Modular poweramp with TDA7293 and TDA7294 - 22 23 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
More power with parallel
modules up to 800W
More power with parallel modulesMore power with 3 parallel modules
Notes
As previous application examples, I offered two parallel module after all main and bridge module on the whole system . With this system by the official datasheet the possible output power is 300W .
For one 300W system these modules required:• 1 Main module• 2 Parallel module• 1 Bridge module• 2 Parallel module• Speaker protection with FAN controllerThis system contains 6 TDA7293 chips, for stereo application required 12 chips .
But try to increase the maximum number of parallel modules more than 2 . If modify the num-ber of 2 parallel modules to 3, the possible output power is around 800W:• 1 Main module• 3 Parallel module• 1 Bridge module• 3 Parallel module• Speaker protection with FAN controllerThis system contains 8 TDA7293 chips, for stereo application required 16 chips + speaker protection . The 800W output power maybe true if one chip really gives 100W . But this sys-tem required more powerful power supply, and better heating system with fan controller .
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
Modular poweramp with TDA7293 and TDA7294 - 24 25 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
More power with parallel modulesSpeaker protection schematic with PWM fan controller V:1
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: 1/22/2012 Sheet ofFile: D:\!Works\..\Amp-Protection+PWM.SchDocDrawn By:
11
UPC1237
22
33
44
55
66
77
88
U2
330uC8
GND
9.2k
R10
1N4148
D7
4.7uC12
GND
56k R8
6.8kR9
GND
10R6
22nC11
GND
1N4148
D5
35
1
46
2
7 8
Rel1
GND
22kR3 1 2
2 inp
ut con
nector
Conn3
GND
1N4148D3
GND
123456789
10
15x1
pin con
nector
1112131415
Conn4
123456789
10
15x1
pin con
nector
1112131415
Conn5
33uC10
GND
GND
GND
3 input connector1 2 3
Conn1
GND
AC 24V+24V
In2
IN3
1
OUT 2
ADJ
LM317VR1
100nC3
10uC1
D112V Zener
GND GND
GND
100nC4
10uC2
GND GND
2
31
411
A
LM324
U1A
5
67B
LM324
U1B
10
98C
LM324
U1C
12
1314D
LM324
U1D
100kR1
100kR2
GND GND
100k
R5
47k
R7
100k
R4 10n
C5
10kP1
5.6k
P2
GND
t°
NTH4G1
RT1Res Thermal
GND
100nC6
1N40
04 D2
A
-
+
12V Co
oler
B2
A
-
+
12V Co
oler
B1
A
-
+
12V Co
oler
B3
Dual Speker protection module with PWM fan controller
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
470
R11
2.7kR12
D4LED2 100nC7
100nC9
D6LED2
IRF640F1
Notes
This new schematic made for this modular amplifier project is PWM fan controller needed . If you build amplifier system with parallel modules, better heating needed . This schematic contains simple speaker protection circuit with UPC1237, but FAN controllers included for 3 12V coolers . These coolers have to be assembled to the heatsink or tho the case of the amplifier . This new circuit can be used and connected between the left and right channels, or after the last module of one channel of mono application . The 10kOhm RT1 thermal resistor must be fixed to the heatsink .
Bill of MaterialsAmp-Protection+PWM.SchDoc 1/22/2012 17:29:40
Comment Footprint Value Quantity Pins Designator Price Total PriceH Total H12V Zener Diode 1 2 D1 #VALUE! #VALUE!
Adj Voltage Regulator + 221A-04 LM317 1 3 VR1 #VALUE! 65 65 Ft
Cap Elco 12 mm, 2 mil pins 330u 1 2 C8 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 10u 2 2 C1, C2 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 33u 1 2 C10 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 4.7u 1 2 C12 #VALUE! #VALUE!
Connector Panel Connector 2 input Small 2 input connector 1 2 Conn3 #VALUE! 20 20 Ft
Connector Panel Connector 3 input Small 3 input connector 1 3 Conn1 #VALUE! 44 44 Ft
Cooler 12V 2 pin connector 100mil 12V Cooler 3 2 B1, B2, B3 #VALUE! #VALUE!
Diode Diode 1N4004 1 2 D2 #VALUE! 2 2 Ft
Diode Diode 1N4148 3 2 D3, D5, D7 #VALUE! 2 6 Ft
Header 15 pin Male connector PHSR-15 (T-T) 15x1 pin connector 2 15 Conn4, Conn5 #VALUE! 10 20 Ft
LED2 2 pin connector 100mil 2 2 D4, D6 #VALUE! #VALUE!
LM324 J014 LM324 1 14 U1 #VALUE! #VALUE!
N-CHANNEL MOSFET TO220 IRF640 1 3 F1 #VALUE! #VALUE!
NonPolarized Cap CAP, Ceramic, 1MIL 100n 5 2 C3, C4, C6, C7, C9 #VALUE! #VALUE!
NonPolarized Cap CAP, Ceramic, 1MIL 10n 1 2 C5 #VALUE! #VALUE!
NonPolarized Cap CAP, Ceramic, 1MIL 22n 1 2 C11 #VALUE! #VALUE!
Relay 2 Relay RE2L 24V DC 1 8 Rel1 #VALUE! #VALUE!
Res Thermal 2 pin connector 100mil NTH4G1 1 2 RT1 #VALUE! #VALUE!
Resistor Resistor 300mil 10 1 2 R6 #VALUE! 2 2 Ft
Resistor Resistor 300mil 100k 4 2 R1, R2, R4, R5 #VALUE! 2 8 Ft
Resistor Resistor 300mil 2.7k 1 2 R12 #VALUE! 2 2 Ft
Resistor Resistor 300mil 22k 1 2 R3 #VALUE! 2 2 Ft
Resistor Resistor 300mil 470 1 2 R11 #VALUE! 2 2 Ft
Resistor Resistor 300mil 47k 1 2 R7 #VALUE! 2 2 Ft
Resistor Resistor 300mil 56k 1 2 R8 #VALUE! 2 2 Ft
Resistor Resistor 300mil 6.8k 1 2 R9 #VALUE! 2 2 Ft
Resistor Resistor 300mil 9.2k 1 2 R10 #VALUE! 2 2 Ft
Trimmer pot POT Trimmer Small 10k 1 3 P1 #VALUE! 40 40 Ft
Trimmer pot POT Trimmer Small 5.6k 1 3 P2 #VALUE! 40 40 Ft
UPC1237 UPC1237 1 8 U2 #VALUE! #VALUE!
46 SUM: #VALUE! #VALUE!
Modular poweramp with TDA7293 and TDA7294 - 26 27 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
More power with parallel modulesSpeaker protection PCB with PWM fan controller V:1
More power with parallel modulesSpeaker protection schematic with PWM fan controller V:2
1
D1
R1
2C2 C1
F1
C3
U2
C7B3
R10C11
D7
C6B2
P2
D5
C12
C10
P1
VR1
R7
D3
C8
Conn4
Conn1
U1
R2
C4
D4Conn3
D6
R3D2
R5
Rel1
C5
3R11
R6
R9
RT1C9B1
R12
R8
R4
TOP LAYER BOTTOM LAYER
OVERLAY ON TOP LAYER
1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
Title
Number RevisionSizeA4
Date: 1/22/2012 Sheet ofFile: D:\!Works\..\Amp-Protection+MIC502-PWM.SchDocDrawn By:
11
UPC1237
22334455667788
U2
330uC8
GND
9.2k
R10
1N4148
D7
4.7uC12
GND
56k R8
6.8kR9
GND
10R6
22nC11
GND
1N4148
D5
35
1
46
2
7 8
Rel1
GND
22kR3 1 2
2 inp
ut co
nnec
tor
Conn3
GND
1N4148D3
GND
123456789
10
15x1 pin
conn
ector
1112131415
Conn4
123456789
10
15x1 pin
conn
ector
1112131415
Conn5
33uC10
GND
GND
GND
3 input connector1 2 3
Conn1
GND
AC 24V+24V
In2
IN3
1
OUT 2
ADJ
LM317VR1
100nC3
10uC1
D112V Zener
GND GND
GND
D6LED2
Dual Speker protection module with PWM fan controller V2
http://diyguitarpa.blogspot.com/http://custompcb.blogspot.com/
220uC2
GND
47kP1
GND
t°
NTH
4G1 RT1
Res Thermal
5kR1
20kR2
GND100nC6
270
R4IRF640F1
100n
C4
1N4004
D2
A- +
12V Cooler
B2
A- +
12V Cooler
B1
A- +
12V Cooler
B3
2.7k
R12D4 LED2
100n
C5
100n
C7
GND
Mic 502
VT11
CF2
VSLP3
GND4 VT2 5OTF 6OUT 7VDD 8U1
GNDGND GND
1N4004D8
GND
Notes
This is the second version of speaker protec-tion with new PWM fan controller . The main part of new fan controller is the MIC502 fan controller chip . With this solution the PCB of this circuit can be much smaller . The schematic contains speaker protection with UPC1237 . With P1 potentiometer set the “sleep mode”, the minimum value of the tem-perature when the coolers starts . I offer 3 or more 12V coolers for heatsink and for the case, depending on the power of full ampli-fier system .
Bill of MaterialsAmp-Protection+MIC502-PWM.SchDoc 1/22/2012 17:30:35
Comment Footprint Value Quantity Pins Designator Price Total PriceH Total HLED2 2 pin connector 100mil 2 2 D4, D6 #VALUE! #VALUE!
Cooler 12V 2 pin connector 100mil 12V Cooler 3 2 B1, B2, B3 #VALUE! #VALUE!
Res Thermal 2 pin connector 100mil NTH4G1 1 2 RT1 #VALUE! #VALUE!
Adj Voltage Regulator + 221A-04 LM317 1 3 VR1 #VALUE! 65 65 Ft
NonPolarized Cap CAP, Ceramic, 1MIL 100n 4 2 C3, C4, C5, C7 #VALUE! #VALUE!
NonPolarized Cap CAP, Ceramic, 1MIL 22n 1 2 C11 #VALUE! #VALUE!
NonPolarized Cap CAP, WIMA, 2MIL 100n 1 2 C6 #VALUE! #VALUE!
12V Zener Diode 1 2 D1 #VALUE! #VALUE!
Diode Diode 1N4004 2 2 D2, D8 #VALUE! 2 4 Ft
Diode Diode 1N4148 3 2 D3, D5, D7 #VALUE! 2 6 Ft
Cap Elco 12 mm, 2 mil pins 220u 1 2 C2 #VALUE! #VALUE!
Cap Elco 12 mm, 2 mil pins 330u 1 2 C8 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 10u 1 2 C1 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 33u 1 2 C10 #VALUE! #VALUE!
Cap Elco 6mm, 1 mil pins 4.7u 1 2 C12 #VALUE! #VALUE!
Header 15 pin Male connector PHSR-15 (T-T) 15x1 pin connector 2 15 Conn4, Conn5 #VALUE! 10 20 Ft
MIC 502 FAN CONTROLLER P008 Mic 502 1 8 U1 #VALUE! #VALUE!
Connector Panel Connector 2 input Small 2 input connector 1 2 Conn3 #VALUE! 20 20 Ft
Connector Panel Connector 3 input Small 3 input connector 1 3 Conn1 #VALUE! 44 44 Ft
Trimmer pot POT Trimmer Small 47k 1 3 P1 #VALUE! 40 40 Ft
Relay 2 Relay RE2L 24V DC 1 8 Rel1 #VALUE! #VALUE!
Resistor Resistor 300mil 10 1 2 R6 #VALUE! 2 2 Ft
Resistor Resistor 300mil 2.7k 1 2 R12 #VALUE! 2 2 Ft
Resistor Resistor 300mil 20k 1 2 R2 #VALUE! 2 2 Ft
Resistor Resistor 300mil 22k 1 2 R3 #VALUE! 2 2 Ft
Resistor Resistor 300mil 270 1 2 R4 #VALUE! 2 2 Ft
Resistor Resistor 300mil 56k 1 2 R8 #VALUE! 2 2 Ft
Resistor Resistor 300mil 5k 1 2 R1 #VALUE! 2 2 Ft
Resistor Resistor 300mil 6.8k 1 2 R9 #VALUE! 2 2 Ft
Resistor Resistor 300mil 9.2k 1 2 R10 #VALUE! 2 2 Ft
N-CHANNEL MOSFET TO220 IRF640 1 3 F1 #VALUE! #VALUE!
UPC1237 UPC1237 1 8 U2 #VALUE! #VALUE!
42 SUM: #VALUE! #VALUE!
Modular poweramp with TDA7293 and TDA7294 - 28 29 - Modular poweramp with TDA7293 and TDA7294
Document last modified and saved: 22 January 2012 5:42 PM
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]
More power with parallel modulesSpeaker protection PCB with PWM fan controller V:2
1
C1
P1
32 D1
D2
U2F1R4
R10D7
R9R8R6
C7B3
D3
D5
C5B1
C12
D4
R2 C8
C10Conn4
Conn3Conn1D6
R3C3
R1
C6
U1 C11
RT1C4B2
R12
VR1
C2
Rel1
TOP LAYER BOTTOM LAYER
OV
ER
LAY
ON
TO
P LA
YE
R