parts

[levelg]

Hi,

Could anyone tell me where i can order IR21844s (14 pin chip) driver chips? I need to repair 10 amps which use the 3s-tech boards plus the smaller chips TL072C and LM211

i need :
40x ir21844s
10x TL072C
10x LM211

anyone have a site i can use for order.

 

[Frank Berry]

I found this:

International Rectifier - IR21844PBF - Drivers - Half Bridge - Allied Electronics

 

[levelg]

Thank you very much, 1 down 2 to go.

 

[Perry Babin]

The item previously listed is the DIP version. You probably need the soic version.

Search result for: 5872015 - Future Electronics Ask if it's available in smaller quantities.

STMICROELECTRONICS | TL072CDT | TL072 Series SOP8 High Speed Low Noise JFET Dual Operational Amplifier - Future Electronics

http://www.futureelectronics.com/en/Technologies/Product.aspx?ProductID=LM211DTSTMICRO2124782

 

[levelg]

I can't believe the response, i like, i like!!!!!!! It seems the lm211 is obsolete any suggestions?

 

[levelg]

thanks perry, for everything. I will contact them now.

 

[Frank Berry]

Try Digikey. Looks like they might have the LM211

 

[levelg]

Thank you Frank, i have actually sent the supplier Perry mentioned an email for getting al the parts from them in one shot.

Thanks, I LOVE THIS FORUM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[djQUAN]

Hi,

Could anyone tell me where i can order IR21844s (14 pin chip) driver chips? I need to repair 10 amps which use the 3s-tech boards plus the smaller chips TL072C and LM211

i need :
40x ir21844s
10x TL072C
10x LM211

anyone have a site i can use for order.

just curious, which amp are these? and, are the chips with the markings ground off are the IR ones?

 

[Perry Babin]

On most boards, all the ones listed are defaced.

 

[djQUAN]

ok thanks for the info. I have one DD M1 sitting here and I have no idea what those parts were. a little circuit tracing will tell me which is which

 

[Perry Babin]

Does that board have 2 or 4 of the 14 pin driver ICs?

 

[levelg]

parts come from 4kw and 5Kw boards. i will have look and see if i still have an m1 to check the part numbers.

 

[Perry Babin]

Sorry for the confusion. djQUAN seemed unsure about the locations for the TL072 and the LM211. U3 is the TL072. U4 is the LM211.

 

[stratus46]

Thank you Frank, i have actually sent the supplier Perry mentioned an email for getting al the parts from them in one shot.

Thanks, I LOVE THIS FORUM!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

LM111/211/311 are all the same device just specified for different temperature ranges. See the data sheet.

http://www.national.com/ds/LM/LM111.pdf

Odds are high you can use a 311 if you can't find 211s.

G²

 

[Perry Babin]

I've used the 311 and didn't have any problems with it.

 

[levelg]

No answer from the supplier, . looking at other options, anyone have more links??

 

[Perry Babin]

If you don't get a response by the end of the day, email me and I'll give you the email of someone I've dealt with in the past.

babin_perry@yahoo.com

 

[levelg]

Thanks for the help. I will await an answer from your contact.

 

[levelg]

I have finally gotten the parts and as luck might have it gotten 2 brand new driver boards as well. I have since installed new FETS( irfp360LC and IRF064N) and new resistors for the burnt ones. There was sound and i used the amplifier for 2 competitions then it started giving hassles again. Changed the muting transistor that runs down the middle of the board between the power supply card and the transistor drive board . after awhile that failed as well. Now the amplifier switches on but there is no sound, i have changed the transistor again but to no avail. any hints on getting this problem sorted?