Need help identifying 8 pin DIP used in Plasma PS PLEASE.

[jango2]

Hitachi 42PD9500TA Plasma TV.
Symptom : High frequency buzz from PS
3 diodes found shorted , replaced, buzz persists.
TV worked fine otherwise from start.
Fault traced to this 8 pin dip smd IC with these no.s printed on it;
2A06810
5522 (MOTOROLA SYMBOL)
No prefix before 5522.
I plucked out this IC from another working 50" Hitachi plasma to
confirm fault.
The no.printed on the working IC is;
2A06905
5522 (MOTOROLA SYMBOL)
Since the IC worked flawlessly on replacement i'm guessing the actual
no. is 5522.
The IC seems to be some kind of pwm controller, it feeds the Mosfets
which drive the serial output transformer, and receives inputs from
feedback winding on the primary side of the SRT and from the
optocouplers.
The Motorola semiconductor site provides no info, maybe this is
supplied OE to Murata who supplies it's PS OE to Hitachi. Again , no
schematic for the PS in the Hitachi service manual.They love us so
much they want us to replace the entire board.
Any idea what the prefix might be and where i can find a datasheet for
the device?
Jango

 

[PlainBill]

Hitachi 42PD9500TA Plasma TV.
Symptom : High frequency buzz from PS
3 diodes found shorted , replaced, buzz persists.
TV worked fine otherwise from start.
Fault traced to this 8 pin dip smd IC with these no.s printed on it;
2A06810
5522 (MOTOROLA SYMBOL)
No prefix before 5522.
I plucked out this IC from another working 50" Hitachi plasma to
confirm fault.
The no.printed on the working IC is;
2A06905
5522 (MOTOROLA SYMBOL)
Since the IC worked flawlessly on replacement i'm guessing the actual
no. is 5522.
The IC seems to be some kind of pwm controller, it feeds the Mosfets
which drive the serial output transformer, and receives inputs from
feedback winding on the primary side of the SRT and from the
optocouplers.
The Motorola semiconductor site provides no info, maybe this is
supplied OE to Murata who supplies it's PS OE to Hitachi. Again , no
schematic for the PS in the Hitachi service manual.They love us so
much they want us to replace the entire board.
Any idea what the prefix might be and where i can find a datasheet for
the device?
Jango

It's a relatively simple process. Since this is an SMD part, the
numbers probably are the marking code. This is an somewhat arbitrary
number assigned by the manufacturer. In this case, I would suspect
2A06 might identify the product and the last three digits are the date
code.

There are three approaches. The first is cheating: Consult the
service manual. I note that it is available on
http://www.free-service-manuals.com/ by either supplying a schematic
they don't have or by paying $5 for a 1 month subscription.

A second approach is to identify the function of the IC (probably a
voltage regulator) and it's exact package. Then search the Motorola
data sheets looking for voltage regulators available in that package
and using a marking code of either 2A0xxxx or 5522.

The third approach would be to use http://www.alldatasheet.com/ to
search for part numbers containing either of the above numbers.

I'm cheap, but I'd still spend the $5.

PlainBill

 

[Franc Zabkar]

Fault traced to this 8 pin dip smd IC with these no.s printed on it;
2A06810
5522 (MOTOROLA SYMBOL)

I thought Motorola's semiconductor division was spun off into ON
Semiconductor.

- Franc Zabkar

 

[JerryM]

I thought Motorola's semiconductor division was spun off into ON
Semiconductor.

Nearly everything that used to be Motorola has been spun off.
"Motorola - Reducing Our Way to Greatness!"

Sorry to be OT, but I couldn't help myself.

Jerry
(Worked for Motorola's Government Electronics Group, spun off to
General Dynamics in 2001. There, I feel better now.)

 

[jango2]

It's a relatively simple process.  Since this is an SMD part, the
numbers probably are the marking code.  This is an somewhat arbitrary
number assigned by the manufacturer.  In this case, I would suspect
2A06 might identify the product and the last three digits are the date
code.

There are three approaches.  The first is cheating:  Consult the
service manual.  I note that it is available onhttp://www.free-service-manuals.com/by either supplying a schematic
they don't have or by paying $5 for a 1 month subscription.

A second approach is to identify the function of the IC (probably a
voltage regulator) and it's exact package.  Then search the Motorola
data sheets looking for voltage regulators available in that package
and using a marking code of either 2A0xxxx or 5522.

The third approach would be to usehttp://www.alldatasheet.com/to
search for part numbers containing either of the above numbers.

I'm cheap, but I'd still spend the $5.

PlainBill- Hide quoted text -

- Show quoted text -

Thanks for taking time to reply Bill,
I have the service manual, as usual the power supply schemafic and
parts list are excluded. They call it "basic schematic".
Searching for 2A06 leads me to an axial diode. One UED search reslust
lists 2A06 as a "UED IC + transistors". I havent a clue what that
means, to the best of my knowledge UED sells spares , they dont
manufacture.
Went hrough alldatasheet and simllar websites , came up with nothing.
I decided to trace the schematic a bit further and for this mysterious
8 pin S08 device and came to the following coclusions;
Pin 1 is an input, decoupled to ground and receives inpus from the
emitter of a transistor and an optocoupler's emitter via a 3k3
resistor
Pin 2 is an input receiving voltage from another optocoupler's
collector.
Pin 3 has a series 10 ohm resistor in series with a string of 2 diodes
in series to ground, which have a string of two 0.1 ohm resistors in
series across them.The emitter of a 2SD2012 power transistor also
connects to the diode - 10 ohm junction (some kinda current sensing
input????)
Pin 4 is ground
Pin 5 is the output and fires the gate of the main MOSFET.
Pin 6 has a small electrolytic condensor to ground and a small smd cap
to ground.(some reset, offset null or OE pin held quiet???)
Pin 7 is not connected.
Pin 8 is supply.
Who am I?
The moment i saw pin 8 vcc and pin 4 ground i was ecstatic and thought
hey this could be an op amp, so i put in a 1458 and she smoked a bit ,
the set wouldnt start. So i guess we can rule out standard op amps.
Jango

 

[Bob Larter]

I thought Motorola's semiconductor division was spun off into ON
Semiconductor.

Yep. <http://www.onsemi.com/>

 

[jango2]

I thought Motorola's semiconductor division was spun off into ON
Semiconductor.

- Franc Zabkar

Hang on , i just discovered the logo on the IC belongs to Murata.
Looks pretty similar to the Motorola M within a circle, except this
one's more like a small M within a larger C. Thanks Franc.
Seems unlikely they'll share any datasheet info but i'm going to
check. Seems unlikely they'll sell spares, i'm doomed , all this
time wasted. They make ICs???????

 

[Bob Larter]

Hang on , i just discovered the logo on the IC belongs to Murata.
Looks pretty similar to the Motorola M within a circle, except this
one's more like a small M within a larger C. Thanks Franc.
Seems unlikely they'll share any datasheet info but i'm going to
check. Seems unlikely they'll sell spares, i'm doomed , all this
time wasted. They make ICs???????

Maybe it's a filter?

 

[jango2]

Maybe it's a filter?

--
    W
  . | ,. w ,   "Some people are alive only because
   \|/  \|/     it is illegal to kill them."    Perna condita delenda est
---^----^----------------------------------------------------------------Hide quoted text -

- Show quoted text -

Nah, just went through muratas SMD BLOCK TYPE EMI SUPPRESSION FILTERS
CATALOGUE, nothing in a SO8 package there. Had an online cat with a
customer rep, she said she'd mail me after she researches the info.
She did state that "Sopheap Sear: I believe the first one is the date
code." ie 2A06810, so 5522 would be the part no.
Jango

 

[PlainBill]

Thanks for taking time to reply Bill,
I have the service manual, as usual the power supply schemafic and
parts list are excluded. They call it "basic schematic".
Searching for 2A06 leads me to an axial diode. One UED search reslust
lists 2A06 as a "UED IC + transistors". I havent a clue what that
means, to the best of my knowledge UED sells spares , they dont
manufacture.
Went hrough alldatasheet and simllar websites , came up with nothing.
I decided to trace the schematic a bit further and for this mysterious
8 pin S08 device and came to the following coclusions;
Pin 1 is an input, decoupled to ground and receives inpus from the
emitter of a transistor and an optocoupler's emitter via a 3k3
resistor
Pin 2 is an input receiving voltage from another optocoupler's
collector.
Pin 3 has a series 10 ohm resistor in series with a string of 2 diodes
in series to ground, which have a string of two 0.1 ohm resistors in
series across them.The emitter of a 2SD2012 power transistor also
connects to the diode - 10 ohm junction (some kinda current sensing
input????)
Pin 4 is ground
Pin 5 is the output and fires the gate of the main MOSFET.
Pin 6 has a small electrolytic condensor to ground and a small smd cap
to ground.(some reset, offset null or OE pin held quiet???)
Pin 7 is not connected.
Pin 8 is supply.
Who am I?
The moment i saw pin 8 vcc and pin 4 ground i was ecstatic and thought
hey this could be an op amp, so i put in a 1458 and she smoked a bit ,
the set wouldnt start. So i guess we can rule out standard op amps.
Jango

I don't fully grasp the partial schematic you describe, but it screams
'pulse width modulated voltage regulator with external transistor'.

PlainBill

 

[jango2]

I don't fully grasp the partial schematic you describe, but it screams
'pulse width modulated voltage regulator with external transistor'.

PlainBill- Hide quoted text -

- Show quoted text -

Hey guys please take a look at the MC44608 datsheet here
http://www.onsemi.com/pub_link/Collateral/MC44608-D.PDF
Think this might be it? Pin 2 and 3 seem to be interchanged. Think i
might be able to use this as a substitute?

 

[jango2]

Hey guys please take a look at the MC44608 datsheet herehttp://www.onsemi..com/pub_link/Collateral/MC44608-D.PDF
Think this might be it? Pin 2 and 3 seem to be interchanged. Think i
might be able to use this as a substitute?- Hide quoted text -

- Show quoted text -

I found a vestel plasma service manual with ps schematics;
http://www.wimtv.be/techniforum/files/vestel_plasma_service_manual.pdf

Oh wait, this ones an even closer match, NCP1200, ON SEMICONDUCTOR
http://www.onsemi.com/pub_link/Collateral/NCP1200-D.PDF
Your precious feedback pleeeeeeeease

 

[Franc Zabkar]

Hang on , i just discovered the logo on the IC belongs to Murata.
Looks pretty similar to the Motorola M within a circle, except this
one's more like a small M within a larger C.

Like this one?
https://www.wellgainelectronics.com/ProductImages/filter/MURATA-SFE4.5MB 89.5K+35+3+500 W3.JPG

Seems unlikely they'll share any datasheet info but i'm going to
check. Seems unlikely they'll sell spares, i'm doomed , all this
time wasted. They make ICs???????

They appear to make PSUs:
http://www.murata.com/products/catalog/pdf/k99/k99e_pwer_01.pdf

Maybe someone else makes/designs their ICs?

I tried a part number search for parts containing "5522" but came up
empty. :-(

- Franc Zabkar

 

[Franc Zabkar]

I found a vestel plasma service manual with ps schematics;
http://www.wimtv.be/techniforum/files/vestel_plasma_service_manual.pdf

Oh wait, this ones an even closer match, NCP1200, ON SEMICONDUCTOR
http://www.onsemi.com/pub_link/Collateral/NCP1200-D.PDF
Your precious feedback pleeeeeeeease

What bothers me most is why the IC is sensing the current in a 60V
2SD2012 power transistor when one would expect it to be sensing the
current in the MOSFET. I'd do a bit more tracing and find out what the
transistor is doing.

I'd also use your good PSU to find out the actual switching frequency.
The NCP1200 has three versions, 40kHz, 60kHz, and 100kHz. I would
think that the magnetics would be optimised for a particular
frequency.

- Franc Zabkar

 

[jango2]

What bothers me most is why the IC is sensing the current in a 60V
2SD2012 power transistor when one would expect it to be sensing the
current in the MOSFET. I'd do a bit more tracing and find out what the
transistor is doing.

I'd also use your good PSU to find out the actual switching frequency.
The NCP1200 has three versions, 40kHz, 60kHz, and 100kHz. I would
think that the magnetics would be optimised for a particular
frequency.

- Franc Zabkar

"Like this one?
https://www.wellgainelectronics.com/ProductImages/filter/MURATA-SFE4...".
Yep Franc , that's the symbol and all the Hitachi Plasma power
supplies i've seen are made by Murata.
"Maybe someone else makes/designs their ICs?"
Exactly, I'm thinking On Semi does.
I'll trace further around the NPN on monday, The good PSU belonged to
a 50" and that was delivered yesterday. Came in for blown lower panel
driver, had to replace entire pcb due to inavailablility of
replacement driver chip. Strangely NCP 1206 is excluded from On semis
datasheets, they have a 1205 and a 1207, i smell a rat, the actual
part i'm seeking has 2A06 printed on it. 2A06810 , you think the 10
might indicate 100kHz?
Thanks for your time Framc
Jango.

 

[Franc Zabkar]

I'll trace further around the NPN on monday, The good PSU belonged to
a 50" and that was delivered yesterday. Came in for blown lower panel
driver, had to replace entire pcb due to inavailablility of
replacement driver chip. Strangely NCP 1206 is excluded from On semis
datasheets, they have a 1205 and a 1207, i smell a rat, the actual
part i'm seeking has 2A06 printed on it. 2A06810 , you think the 10
might indicate 100kHz?

I don't think so. The other IC had 2A06905 printed on it. That would
suggest that the last three digits may be part of a date code or batch
code.

If you know when the two sets were manufactured, then you may be able
to decipher the date codes. The date codes on the other chips may also
give you a clue, especially if they follow a similar format. AFAICT
the subject model was released in late 2006 or early 2007, so maybe
the "06" refers to 2006. If "2A" is also part of the date, then I'd
suspect a Japanese manufacturer. BTW, Renesas (Hitachi) do manufacture
PWM controllers, but I couldn't find a suitable part on their web
site. You might want to look for yourself, though, if the NCP1200
turns out to be unsuitable.

- Franc Zabkar

 

[Franc Zabkar]

Hitachi 42PD9500TA Plasma TV.
Symptom : High frequency buzz from PS
3 diodes found shorted , replaced, buzz persists.
TV worked fine otherwise from start.

Fault traced to this 8 pin dip smd IC with these no.s printed on it;
2A06810
5522

I feel certain that your mystery part is a Fuji FA5522N, whatever it
is.

See this document:
http://www.fujielectric.co.jp/company/jihou_archives/pdf/78-01/FEJ-78-01-072-2005.pdf

See the photo on page 75 (4 of 6).

It shows the 5516, 5517, and 5518 parts. Their date/batch codes are
2A04ES9 (or 2AD4ES9 ?) and 1H04ES9.

I found several hits for the following parts:

FA5522N-A2-TE1, FAIRCHILD, 2007, SOP 8L
FUJI -FA5522N-A2-TE1
FA5518N-H1-TE1, FUJI, 2006
FA5518N-A2-TE1, FUJI

It seems that the various suppliers aren't sure whether the part is
made by Fuji or Fairchild. AFAICT, Fairchild's parts use an "FAN"
prefix.

FWIW, here is the datasheet for Fuji Semiconductor's FA551X series PWM
type switching power supply control ICs.

FA5510P (N), FA5511P (N), FA5514P (N), FA5515P (N):
http://www.fujisemiconductor.com/pdf/B0401031.pdf

Application note for FA5516/5517/5518:
http://www.fujielectric.co.jp/fdt/scd/pdf/IC/AJ_FA5516-18.pdf

- Franc Zabkar

 

[Franc Zabkar]

I feel certain that your mystery part is a Fuji FA5522N, whatever it
is.

Here are more documents that may help. Page 9 of the "part number
explanation" associates the "55" with an AC/DC converter controller.

http://www.fujisemiconductor.com/old_pdf/app_notes/FA5516_5517_5518_Application_Note.pdf
http://www.fujisemiconductor.com/old_pdf/app_notes/FA5531_Application_Note.pdf
http://www.fujisemiconductor.com/old_pdf/app_notes/part_number_evplanation.pdf

There is an email address at this URL:
http://www.fujisemiconductor.com/

- Franc Zabkar

 

[jango2]

Here are more documents that may help. Page 9 of the "part number
explanation" associates the "55" with an AC/DC converter controller.

http://www.fujisemiconductor.com/ol...ctor.com/old_pdf/app_notes/part_number_evplan...

There is an email address at this URL:http://www.fujisemiconductor.com/

- Franc Zabkar

Thanks once again franc,
I can't find a datasheet for FA5522. I'm not at work yet, need to
relook at FA5516/7/8 as the closest match so far. Pin 7 is NC too.
I checked below the mystery IC and it has "Japan" embossed on it
So that would mean Fuji Japan made this for Murata and even printed
their logo on it, withheld datasheet as it's OE.
Hmm will revert back by evening and will even check for local
availability of FA5516/7/8. I have to probe into the 2sd2012 mystery
too,
Trace that section further. I will report discrepancies then.
Thank You
Jango

 

[Franc Zabkar]

I can't find a datasheet for FA5522. I'm not at work yet, need to
relook at FA5516/7/8 as the closest match so far. Pin 7 is NC too.

The FA551x parts don't match your pinout discoveries, so I wouldn't
use them. I just cited them for comparison purposes.

I checked below the mystery IC and it has "Japan" embossed on it

It would have helped me a great deal to have known that ...

So that would mean Fuji Japan made this for Murata and even printed
their logo on it, withheld datasheet as it's OE.
Hmm will revert back by evening and will even check for local
availability of FA5516/7/8. I have to probe into the 2sd2012 mystery
too,
Trace that section further. I will report discrepancies then.

I don't understand why a 60V audio frequency power transistor would be
used on the primary side of a high frequency switchmode PSU.

I notice that the mains rating of this TV is AC 110-240V (50/60Hz), so
maybe it uses active PFC to boost the voltage on the bulk capacitor to
around 380V. AIUI, this would require a high voltage power
transistor/MOSFET to switch a coil on and off during each mains
half-cycle. The transistor/MOSFET would only need to be rated for low
frequency use. The FA5522N part doesn't seem to have enough pins to
implement APFC, so I would expect that there must be another IC in the
PSU.

Is there any chance you could upload a photo of the PSU to a file
sharing service?

BTW, you can determine the switchmode frequency by monitoring the
anode of any rectifier diode on the secondary winding. You don't need
to risk probing on the primary side.

- Franc Zabkar