Antminer S5 blade Step down voltage chip --Help need it

[borisg26]

Have many blade with these bad chip U101, need part number or any other options to fix
the step down voltage.

http://ctisistemas.com/img/S5ocj.png

http://ctisistemas.com/img/S5ocj2.png

http://ctisistemas.com/img/S5board.png

[pinhead666]

It looks like pretty simple step-down circuit.What are you supposed to get out of it? I think you can use that other U2 circuit instead of U1 circuit. U2 seems to be pin-compatible with eg MP1484.

[borisg26]

It looks like pretty simple step-down circuit.What are you supposed to get out of it? I think you can use that other U2 circuit instead of U1 circuit. U2 seems to be pin-compatible with eg MP1484.

I check MP1484 and is not pin compatible any other sugestion, any sugestion

[RichBC]

I do not know the part number of the chip, however it's a DC-DC step up converter. Output is about 14V and is used to supply the LDO which provides 1.8V  for PLL & IO voltage to the last three stages in the chain. Or in the case of the V1.91 Hash board just the last stage.

Are you sure it's faulty / have you measured the output voltage?


Rich

[RadekG]

I do not know the part number of the chip, however it's a DC-DC step up converter. Output is about 14V and is used to supply the LDO which provides 1.8V  for PLL & IO voltage to the last three stages in the chain. Or in the case of the V1.91 Hash board just the last stage.

Are you sure it's faulty / have you measured the output voltage?


Rich

Yes, this is step-up converter and it raises 12V (any supply voltage) to about 14V to supply IO and PLL of ASICs as they are "serially" connected.

[RichBC]

I do not know the part number of the chip, however it's a DC-DC step up converter. Output is about 14V and is used to supply the LDO which provides 1.8V  for PLL & IO voltage to the last three stages in the chain. Or in the case of the V1.91 Hash board just the last stage.

Are you sure it's faulty / have you measured the output voltage?


Rich

Yes, this is step-up converter and it raises 12V (any supply voltage) to about 14V to supply IO and PLL of ASICs as they are "serially" connected.

I thought that was what I had said? What would be more useful is, has the OP measured the voltage?

Rich

[J4bberwock]

I'd place my bids on TPS61170 as compatible.
I didn't check the pinout against what is on the S5 board, but it's the only one I've found in 6 pins package with specifications that would match the part on board regarding Vin and Vout.
The device marking is supposed to be BZS, but maybe the one on the S5 board is simply a clone from another manufacturer.

http://www.ti.com/lit/ds/symlink/tps61170.pdf

[RichBC]

I'd place my bids on TPS61170 as compatible.
I didn't check the pinout against what is on the S5 board, but it's the only one I've found in 6 pins package with specifications that would match the part on board regarding Vin and Vout.
The device marking is supposed to be BZS, but maybe the one on the S5 board is simply a clone from another manufacturer.

http://www.ti.com/lit/ds/symlink/tps61170.pdf

Am away from Home, but looking at a picture of an S5 Hash Board the Pinout ties up with the TPS61170, so I think a good call.

Rich

[borisg26]

I'd place my bids on TPS61170 as compatible.
I didn't check the pinout against what is on the S5 board, but it's the only one I've found in 6 pins package with specifications that would match the part on board regarding Vin and Vout.
The device marking is supposed to be BZS, but maybe the one on the S5 board is simply a clone from another manufacturer.

http://www.ti.com/lit/ds/symlink/tps61170.pdf

Am away from Home, but looking at a picture of an S5 Hash Board the Pinout ties up with the TPS61170, so I think a good call.

Rich

After checking the S5 board it looks 90% that TPS61170 belong to U101 ( step up voltage) for S5 hashboard

[J4bberwock]

I'd place my bids on TPS61170 as compatible.
I didn't check the pinout against what is on the S5 board, but it's the only one I've found in 6 pins package with specifications that would match the part on board regarding Vin and Vout.
The device marking is supposed to be BZS, but maybe the one on the S5 board is simply a clone from another manufacturer.

http://www.ti.com/lit/ds/symlink/tps61170.pdf

Am away from Home, but looking at a picture of an S5 Hash Board the Pinout ties up with the TPS61170, so I think a good call.

Rich

After checking the S5 board it looks 90% that TPS61170 belong to U101 ( step up voltage) for S5 hashboard

Nice, don't forget that if you replace U101 with TPS61170, 5% of the hashrate from your S5 will mine directly to my BTC address 

I have a few S5 boards that failed after a shortcircuit, never had the time to check what was wrong, I'll start with U101 output.

[J4bberwock]

I just found the exact one:
http://www.richtek.com/assets/product_file/RT8537/DS8537-00.pdf

[borisg26]

I just found the exact one:
http://www.richtek.com/assets/product_file/RT8537/DS8537-00.pdf

Right I think 100% that is the U101
Some source to find it
http://world.taobao.com/item/41623701251.htm?spm=a312a.7700714.0.0.SuihJf#detail

[HerbPean]

I just found the exact one:
http://www.richtek.com/assets/product_file/RT8537/DS8537-00.pdf

Right I think 100% that is the U101
Some source to find it
http://world.taobao.com/item/41623701251.htm?spm=a312a.7700714.0.0.SuihJf#detail

Anything closer to Canada and USA ?

[SunnyIgor]

Have many blade with these bad chip U101, need part number or any other options to fix
the step down voltage.

how do you know this is bad chip?

multimeter or what?

[RichBC]

how do you know this is bad chip?

multimeter or what?

Yes measure the voltage between ground and the bottom end of R213. Should be about 14V. If much less than this chip is probably faulty.

Rich

[SunnyIgor]

I'm sorry but a complete noob at that level
don't completely understand what you mean...
I can take ground from anywere??

machine off right?

btw. is this the most common issue on dead boards?

beacause I have a ton of them......

any links on Englisch sites for this part?