Problem with STK401-130

hti97088 · 18th March 2007, 04:10 PM

HI all
i've a proble with STK401-130
the problem are:
when i make the pcb as shown in datasheet i found it have some error (short circuit) between +ve and -ve pins
there are some different between the schematic and pcb in this datasheet so i don't know who is right schematic or pcb
at any way when i make the pcb it fails
and when i make a new pcb from the schematic the amp work good with good sound but
R9 and R5 have been burned due to very high heat
i don't know why
then the IC it self burned
so can any one help me in this problem or can suggest any circuit compatible with this IC
THANKS
this is the datasheet for IC
http://www.egytronics.agff.net/upcenter/stk401-130.pdf

hti97088 · 19th March 2007, 09:12 AM

PLEASE I NEED A HELP

Netlist · 19th March 2007, 10:47 AM

Can you point us to the difference between PCB and schematic?

/Hugo

hti97088 · 19th March 2007, 03:12 PM

one of the different
pin10 ,11 in schematic are not connectd but in yhe pcb are connected
pin 12 are not connected in pcb but connected in schematics

Netlist · 19th March 2007, 03:31 PM

Pin 10 and 11 are not connected inside the IC so it doesn’t matter if they are connected on the PCB trace or not. No worries here.
Pin 12 should go to the –ve trace. I accentuated the trace, see if it matches your design.

/Hugo

hti97088 · 20th March 2007, 11:27 AM

ok,
but why R9 and R5 have been burned due to very high heat?

Netlist · 20th March 2007, 11:33 AM

Most likely, when the chip went up in smoke, it took R9 and R5 along with him.

/Hugo

Netlist · 20th March 2007, 12:02 PM

It might also be that the wattage you used is inadequate. Try a few watts for these R's.

-=Hugo=-

hti97088 · 20th March 2007, 01:18 PM

ok i'll try then give u a result
thanks for your help

hti97088 · 21st March 2007, 09:22 AM

the problem is still
after replaced the resistor with other one 7watt
the resistor was heated
then burned
i don't know why?

18th March 2007, 04:10 PM	#1
hti97088 diyAudio Member Join Date: Oct 2004	Problem with STK401-130 HI all i've a proble with STK401-130 the problem are: when i make the pcb as shown in datasheet i found it have some error (short circuit) between +ve and -ve pins there are some different between the schematic and pcb in this datasheet so i don't know who is right schematic or pcb at any way when i make the pcb it fails and when i make a new pcb from the schematic the amp work good with good sound but R9 and R5 have been burned due to very high heat i don't know why then the IC it self burned so can any one help me in this problem or can suggest any circuit compatible with this IC THANKS this is the datasheet for IC http://www.egytronics.agff.net/upcenter/stk401-130.pdf

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19th March 2007, 09:12 AM	#2
hti97088 diyAudio Member Join Date: Oct 2004	PLEASE I NEED A HELP

19th March 2007, 10:47 AM	#3
Netlist diyAudio Moderator Join Date: Jan 2003	Can you point us to the difference between PCB and schematic? /Hugo

19th March 2007, 03:12 PM	#4
hti97088 diyAudio Member Join Date: Oct 2004	one of the different pin10 ,11 in schematic are not connectd but in yhe pcb are connected pin 12 are not connected in pcb but connected in schematics

20th March 2007, 11:27 AM	#6
hti97088 diyAudio Member Join Date: Oct 2004	ok, but why R9 and R5 have been burned due to very high heat?

20th March 2007, 11:33 AM	#7
Netlist diyAudio Moderator Join Date: Jan 2003	Most likely, when the chip went up in smoke, it took R9 and R5 along with him. /Hugo

20th March 2007, 12:02 PM	#8
Netlist diyAudio Moderator Join Date: Jan 2003	It might also be that the wattage you used is inadequate. Try a few watts for these R's. -=Hugo=-

20th March 2007, 01:18 PM	#9
hti97088 diyAudio Member Join Date: Oct 2004	ok i'll try then give u a result thanks for your help

21st March 2007, 09:22 AM	#10
hti97088 diyAudio Member Join Date: Oct 2004	the problem is still after replaced the resistor with other one 7watt the resistor was heated then burned i don't know why?

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