TDA7386 Problem please help

Brownstocker · 26th January 2008, 11:15 PM

hi
i tried to build the TDA7386 But Couldn't Get it work where i didn't connect the st/by and mute final terminals from resistors but i think it will not affect the chip.
and tried to just work two channels only as experiment (also i don't know how to get the stereo input into quad input)
but what i found is my transformer is gettin very hot quickly
So please help me or send me the pcb u worked with but single layer
Also i'm a beginner

Brownstocker · 27th January 2008, 12:27 AM

all of u ignoring me without even one word ,what a kind people..

KSTR · 27th January 2008, 12:52 AM

Um, patience seems not to be your strong point... so let me have a look at the spec sheet to see if I can help you...

---:---

... OK, arrange MUTE and STBY as given in the datasheet and hook both inputs to the positive supply (Vcc). In any case these pin's RC-circuits *must* be connected to something (either Vcc -- which means device is active -- or GND).

You can simply connect two input channels, on the left side of the input capacitors (but not directly at the pins). Then you have identical outputs from these stages and can connect two sets of speakers. You cannot combine outputs directly.

A layout is found in the datasheet, you "only" have to recreate it.

- Klaus

Brownstocker · 28th January 2008, 12:22 PM

thanx Klaus
U really Demonstrated That Misunderstanding of St/By And Mute Connection.
so Now to make it work well i should connect mute and st/by at the vcc
does that means to make mute is disabled and stand by is enabled?

KSTR · 28th January 2008, 08:59 PM

No, the way I interpret the datasheet: one needs to tie both to Vcc to have the chip working. Best thing would be to use toggle switches to connect either of them to GND or Vcc at will. When connected to GND, then the mute resp. standby modes are entered.

Brownstocker · 28th January 2008, 10:02 PM

thanx dude
i will try it then if any thing was wrong i'm gonna ask u
but i will build it all again because i think it is burnt

26th January 2008, 11:15 PM	#1
Brownstocker diyAudio Member Join Date: Jan 2007	TDA7386 Problem please help hi i tried to build the TDA7386 But Couldn't Get it work where i didn't connect the st/by and mute final terminals from resistors but i think it will not affect the chip. and tried to just work two channels only as experiment (also i don't know how to get the stereo input into quad input) but what i found is my transformer is gettin very hot quickly So please help me or send me the pcb u worked with but single layer Also i'm a beginner

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27th January 2008, 12:27 AM	#2
Brownstocker diyAudio Member Join Date: Jan 2007	all of u ignoring me without even one word ,what a kind people..

27th January 2008, 12:52 AM	#3
KSTR diyAudio Member Join Date: Jul 2007 Location: Central Berlin, Germany	Um, patience seems not to be your strong point... so let me have a look at the spec sheet to see if I can help you... ---:--- ... OK, arrange MUTE and STBY as given in the datasheet and hook both inputs to the positive supply (Vcc). In any case these pin's RC-circuits must be connected to something (either Vcc -- which means device is active -- or GND). You can simply connect two input channels, on the left side of the input capacitors (but not directly at the pins). Then you have identical outputs from these stages and can connect two sets of speakers. You cannot combine outputs directly. A layout is found in the datasheet, you "only" have to recreate it. - Klaus

28th January 2008, 12:22 PM	#4
Brownstocker diyAudio Member Join Date: Jan 2007	thanx Klaus U really Demonstrated That Misunderstanding of St/By And Mute Connection. so Now to make it work well i should connect mute and st/by at the vcc does that means to make mute is disabled and stand by is enabled?

28th January 2008, 08:59 PM	#5
KSTR diyAudio Member Join Date: Jul 2007 Location: Central Berlin, Germany	No, the way I interpret the datasheet: one needs to tie both to Vcc to have the chip working. Best thing would be to use toggle switches to connect either of them to GND or Vcc at will. When connected to GND, then the mute resp. standby modes are entered.

28th January 2008, 10:02 PM	#6
Brownstocker diyAudio Member Join Date: Jan 2007	thanx dude i will try it then if any thing was wrong i'm gonna ask u but i will build it all again because i think it is burnt