This is a PCB i got from a junk shop, contains all components like rectifier, filter and mostly all components needed for a power amplifier except the IC. looking closely this is wired in bridge mode (BTL) the IC has 14 pins
Pins description:
Pins 1,8,10,13 ground.
7 +Vcc.
3 inv i/p
2 non inv i/p (the input signal is given here.
4 & 11 output (BTL)
will post full details if needed
and in true DIY spirits i decided to make a powered speaker for my ipod, and i did search the web (Google) with no results regarding the IC used.Any help in identifying the IC will be appreciated thanks in adv
Pins description:
Pins 1,8,10,13 ground.
7 +Vcc.
3 inv i/p
2 non inv i/p (the input signal is given here.
4 & 11 output (BTL)
will post full details if needed
and in true DIY spirits i decided to make a powered speaker for my ipod, and i did search the web (Google) with no results regarding the IC used.Any help in identifying the IC will be appreciated thanks in adv
I like to enter my guess in the lottery. . . a somewhat under-volted stereo automotive chip amplifier from ST Thompson?
Anyway, a magnifying glass and a flashlight could possibly let you read the details right from the chip itself. 😉
EDIT: Next guess would be a slightly big op amp, such as used to power computer speakers. Although, if you were really, really lucky, its something from MPS, but I think nobody is lucky enough to find a bridged MPS MP7720 or something like that.
Anyway, a magnifying glass and a flashlight could possibly let you read the details right from the chip itself. 😉
EDIT: Next guess would be a slightly big op amp, such as used to power computer speakers. Although, if you were really, really lucky, its something from MPS, but I think nobody is lucky enough to find a bridged MPS MP7720 or something like that.
The chips were missing from the pcb and the supply volts is 12V.most probably the IC is LA series from Sanyo as am told.
there is a possibility
that these boards are made for LA4705N-08N family please check existing schematics allover the net
that these boards are made for LA4705N-08N family please check existing schematics allover the net
Finally..i got the answer from WWW wide goose chase...
its LA3508 dual ch amp. the circuit is in BTL mode..
its LA3508 dual ch amp. the circuit is in BTL mode..
- Status
- Not open for further replies.