Legato 3 - Look ma! No caps!

[acidbrain]

looks like pots or fixed R' to choose.

 

[Russ White]

Yes the CCS scheme is built for larger loads, the original Placid BP was not really intended for high current. It was really designed for IVY III.

 

[Russ White]

looks like pots or fixed R' to choose.

Correct.

 

[avr300]

Any estimated time of departure (from stock) of the HD ?

 

[natzev_i]

Russ,
I suppose a single Placid HD for supplying the power hungry BII+Tridents will be available also?

 

[LeonvB]

the CCS scheme is built for larger loads

What's the current limit? Also, how much current would the Legato 3 need?

 

[AndriyOL]

Guys, when will you design 8 channel DAC based on ES9018 chip?

 

[Russ White]

Any estimated time of departure (from stock) of the HD ?

That all depends on how this prototype works out.

 

[Russ White]

Guys, when will you design 8 channel DAC based on ES9018 chip?

Who says we haven't?

Not everything we design makes it too production. At least not until we decide its ready.

 

[AndriyOL]

So, when it will be ready to order? I'm not asking an exact time, just approximate.

 

[Russ White]

1) What's the current limit? Also, 2) how much current would the Legato 3 need?

1) Depends on the app. Voltage drop etc. But it is designed to do 1.5A or so under the right conditions. Its just a prototype right now, so we still need to test the limits, but that is what it is designed to do provided adequate heat sinking etc.

2) About ~200ma each rail idle. You will want to add to that your anticipated headphone (with 2VRMS) load to get your CCS cuurent plus say 25% headroom. I would say 300-400ma from CCS would be a pretty good place to start.

 

[Russ White]

So, when it will be ready to order? I'm not asking an exact time, just approximate.

That is yet to be determined.

 

[Russ White]

Russ,
I suppose a single Placid HD for supplying the power hungry BII+Tridents will be available also?

Yes quite likely, but Placid is actually a different circuit then Placid BP and really more suited for high current than PlacidBP.

 

[NicMac]

Russ and Brian,
Do I understand correctly that when using the L3 with balanced output only the circuit is identical to that of L2 (except for the missing caps and different fets)?
Cheers,
Nic

 

[Russ White]

Yes, essentially identical.

 

[ferrilu1]

I mean...with a PlacidBP is possible to obtain +-12V and 300 mA...isn't it? Is that sufficient?

gianluca

 

[regiregi22]

I mean...with a PlacidBP is possible to obtain +-12V and 300 mA...isn't it? Is that sufficient?

gianluca

Maybe you want to supply anything different than a Legato or a BII.

 

[ferrilu1]

ok explain me please, I'm here also to learn.
g

 

[regiregi22]

Nothing to explain, just that if you want to supply a different diy device that needs higher currents, like a preamp, or even a little poweramp, you can do so.

 

[NicMac]

Maybe you want to go dual-mono with 15V rails........