DUAL BRIDGE AUDIO AMPLIFIER TDA7374B
This Amplifier was new to me and it could make a new type of chip-amp perhaps.
It is very likly that this is the core of the Altmann BYOB amplifier (see thread "...spruce...").
The advantages are:
MINIMUM EXTERNAL COMPONENT COUNT
NO BOOTSTRAP CAPACITORS
NO BOUCHEROT CELLS
CLIP DETECTOR OUTPUT
HIGH OUTPUT POWER
FIXED GAIN
VERY LOW STAND-BY CURRENT (1mA typ)
NO SWITCH ON/OFF NOISE
MULTIWATT15
OUTPUT AC/DC SHORT CIRCUIT TO GND AND TO VS
VERY INDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSE BATTERY
ESD
DESCRIPTION: The TDA7374B is a new technology class AB Audio Dual Bridge Power Amplifier in Multiwatt package designed for car radio applications. Thanks to the fully complementary PNP/NPN output configuration the high power performances of the TDA7374B are obtained without bootstrap capacitors.
....
Together with an old car battery one can make a very simple and perhaps also soundwise effective amplifier. I would suggest to omit the electrolytic in the supply line also.
st-by is connected to Vcc+. The case is electrically connected to ground and can be mounted on the fairly small heatsink without an insulation.
The attached application schematic is copied from the datasheet available at http://www.st.com/stonline/books/pdf/docs/1549.pdf
Looks good, folks, doesn't it?
Klaus /-likes chip amps
This Amplifier was new to me and it could make a new type of chip-amp perhaps.
It is very likly that this is the core of the Altmann BYOB amplifier (see thread "...spruce...").
The advantages are:
MINIMUM EXTERNAL COMPONENT COUNT
NO BOOTSTRAP CAPACITORS
NO BOUCHEROT CELLS
CLIP DETECTOR OUTPUT
HIGH OUTPUT POWER
FIXED GAIN
VERY LOW STAND-BY CURRENT (1mA typ)
NO SWITCH ON/OFF NOISE
MULTIWATT15
OUTPUT AC/DC SHORT CIRCUIT TO GND AND TO VS
VERY INDUCTIVE LOADS
OVERRATING CHIP TEMPERATURE
LOAD DUMP VOLTAGE
FORTUITOUS OPEN GND
REVERSE BATTERY
ESD
DESCRIPTION: The TDA7374B is a new technology class AB Audio Dual Bridge Power Amplifier in Multiwatt package designed for car radio applications. Thanks to the fully complementary PNP/NPN output configuration the high power performances of the TDA7374B are obtained without bootstrap capacitors.
....
Together with an old car battery one can make a very simple and perhaps also soundwise effective amplifier. I would suggest to omit the electrolytic in the supply line also.
st-by is connected to Vcc+. The case is electrically connected to ground and can be mounted on the fairly small heatsink without an insulation.
The attached application schematic is copied from the datasheet available at http://www.st.com/stonline/books/pdf/docs/1549.pdf
Looks good, folks, doesn't it?
Klaus /-likes chip amps
Attachments
Re: Tda 7374
Lohk:
One never stops to appreciate the quality of chip amps rolling out these days however, I don't seem to understand the usage of non-standard packing like multiwatt and flexiwatt, as, if one wants to make a decent PCB in programs like circuit maker, protel etc these chips are not available in the device libraries meaning you cant make a PCB, an example is TDA7386 where chipamp seem gorgeous four channel 40 watt each, data is wonderful I did purchase few of these but I am stuck without availabiliity of device library for the CHIP, any suggestions???
Lohk:
One never stops to appreciate the quality of chip amps rolling out these days however, I don't seem to understand the usage of non-standard packing like multiwatt and flexiwatt, as, if one wants to make a decent PCB in programs like circuit maker, protel etc these chips are not available in the device libraries meaning you cant make a PCB, an example is TDA7386 where chipamp seem gorgeous four channel 40 watt each, data is wonderful I did purchase few of these but I am stuck without availabiliity of device library for the CHIP, any suggestions???
Hi Abidr,
is 15pin multiwatt definitely a "nonstandard" package? Although I am definitely not a Protel etc. specialist, I cannot imagine that there is no library for these items. Did you search the companies web pages? Is there no possibility to create a library entry yourself? How were then the thousands of existing PCBs for those amplifiers made?
But yours seems a very relevant question, I am very sure that some people here can help you.
As a "small scale" DIYer with a "hardboiled" attitude I do my chip amps in p2p without a PCB. An amplifier with the TDA7374 is basically easy: You have only a single supply, no feedback and gain resistors (doesn't that give the "shortest feedback path" of all!!), only some minor parts for the stabilisation and input caps (if you need them at all). The pin are situated in the appropriate positions close together, the small heatsink is at ground potential. Why do I need a PCB here? (You still can mount it on a piece of spruce...)
After experiences with the LM1876 (2x20W) I am not sure if an intergrated stereo amp can deliver high-end performance. But it is quite cheap, all the necessary parts are in everybodies parts box anyway, so to try out is no big deal. I very much like the idea of getting an battery powered amp with reasonable power with a single car battery (and without those otherwise inevitable distortion or the power converters). The quiescent current is very low, so the low level resolution of the amp is probabl not the bright too, but with a clean supply like a car battery (outside of a car!) or even dry cells it is worth testing. Poor mans Final Amps!
Klaus
ps: Here the TDA7374 seems to be available only at reichelt for about 8 Euro.
is 15pin multiwatt definitely a "nonstandard" package? Although I am definitely not a Protel etc. specialist, I cannot imagine that there is no library for these items. Did you search the companies web pages? Is there no possibility to create a library entry yourself? How were then the thousands of existing PCBs for those amplifiers made?
But yours seems a very relevant question, I am very sure that some people here can help you.
As a "small scale" DIYer with a "hardboiled" attitude I do my chip amps in p2p without a PCB. An amplifier with the TDA7374 is basically easy: You have only a single supply, no feedback and gain resistors (doesn't that give the "shortest feedback path" of all!!), only some minor parts for the stabilisation and input caps (if you need them at all). The pin are situated in the appropriate positions close together, the small heatsink is at ground potential. Why do I need a PCB here? (You still can mount it on a piece of spruce...)
After experiences with the LM1876 (2x20W) I am not sure if an intergrated stereo amp can deliver high-end performance. But it is quite cheap, all the necessary parts are in everybodies parts box anyway, so to try out is no big deal. I very much like the idea of getting an battery powered amp with reasonable power with a single car battery (and without those otherwise inevitable distortion or the power converters). The quiescent current is very low, so the low level resolution of the amp is probabl not the bright too, but with a clean supply like a car battery (outside of a car!) or even dry cells it is worth testing. Poor mans Final Amps!
Klaus
ps: Here the TDA7374 seems to be available only at reichelt for about 8 Euro.
RE:
Hi! Lohk, TDA 7374 seems definitley worth giving a try, right nw I am working in a 5.1 system based upon TDA 7386 and TDA 729X once I am through with it I surely would give it a try and post my findings of the chip.
Secondly, there definitley would be a way to adressing he problem created by these non-standard pacage of chip amps, i have posted my querry in this regard however no one seem to reply????
Hi! Lohk, TDA 7374 seems definitley worth giving a try, right nw I am working in a 5.1 system based upon TDA 7386 and TDA 729X once I am through with it I surely would give it a try and post my findings of the chip.
Secondly, there definitley would be a way to adressing he problem created by these non-standard pacage of chip amps, i have posted my querry in this regard however no one seem to reply????
I wanted to build a power amp into a "briefcase computer" to make it a fancy ghetto blaster. I was thinking of using LM3875 but This would be perfect because it can run off +12 volts.
I know its not really very "hi fi" especially using the computer PSU! but its DIY, AUDIO, and a chip amp
and its only playing mp3 from an onboard sound card anyways.
and there MAY have to be a fan but i hope not.
I wonder if it is safe to put a smoothing capacitor on an ATX + 12 v line..
maybe with a resistor in series?
anyways i need to find a place in canada/us that has them
I know its not really very "hi fi" especially using the computer PSU! but its DIY, AUDIO, and a chip amp
and its only playing mp3 from an onboard sound card anyways. and there MAY have to be a fan but i hope not.
I wonder if it is safe to put a smoothing capacitor on an ATX + 12 v line..
maybe with a resistor in series?
anyways i need to find a place in canada/us that has them
TDA chip amp
What about these TDA amps ?
Do a search for TDA or STEREO AMPLFIER
at :
http://store.qkits.com/
What about these TDA amps ?
Do a search for TDA or STEREO AMPLFIER
at :
http://store.qkits.com/
To TUBO,
Im saw this to late. But perhaps this is useful for you.
You can get a complete "kit" at:
www.voti.nl
search for voti-003 kit. (17 euro, stereo )
It is build around the TDA7375V
The kit is very complete, but you need more cooling surface (pentium) and a knob for the volume poy.
The owner of the web shop is called Wouter, and is very helpfull.
There is also a very good description of the building proces, pdf file in English.
I like the minimal approach, like ZEN !! So :
Build your own BYOB amp.
!!Very GOOD starter project for every new chip-amp builder!!
I did, because I'm planning a group-build with children and didn't want to use 230V in the concept.
Sound is pretty nice on a laptop power.
It's burning in now and I will compare it to my other "gain-clones" in a short while.
Used a dammar coated spruce board as well!!
(Dammar on chip as well)
Gone try sla powering as well.
I will post some pics in a few days.
good luck Leon
Im saw this to late. But perhaps this is useful for you.
You can get a complete "kit" at:
www.voti.nl
search for voti-003 kit. (17 euro, stereo )
It is build around the TDA7375V
The kit is very complete, but you need more cooling surface (pentium) and a knob for the volume poy.
The owner of the web shop is called Wouter, and is very helpfull.
There is also a very good description of the building proces, pdf file in English.
I like the minimal approach, like ZEN !! So :
Build your own BYOB amp.
!!Very GOOD starter project for every new chip-amp builder!!
I did, because I'm planning a group-build with children and didn't want to use 230V in the concept.
Sound is pretty nice on a laptop power.
It's burning in now and I will compare it to my other "gain-clones" in a short while.
Used a dammar coated spruce board as well!!
(Dammar on chip as well)
Gone try sla powering as well.
I will post some pics in a few days.
good luck Leon
I know this is an old thread, but i built an amp using this chip on strip board and I'm very happy with it 4 ohm speakers it performs well, with 6 and 8ohm speakers it performs very very well. It is a very impressive chip and it doesn't really need a heat sink under most operating conditions.
unfortunately the only way to get them in small quantities via auction sites, if you want smaller quantities of audio amps you should use a chip that is still in production.
I hope this helps.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.