Hypex Ncore

[ds23man]

Maybe Bel Canto can buy my design!

 

[Julf]

OK, so they haven't actually implemented anything special, just a connection to the standard hypex smps standby.

 

[Boggit]

which turns the amp OFF!! +12V Trigger off the amp goes! Strange?

 

[Julf]

which turns the amp OFF!! +12V Trigger off the amp goes! Strange?

Exactly opposite to the established standard, and rather inconvenient for users, but I am sure it made the circuitry somewhat easier to implement.

 

[ds23man]

Just two wires!

 

[burkm]

Any practical reason not to use a solid state relay to pull down that SMPS input to GND, which would enable the PSU and the amp itself ? They need a much smaller current to operate and the input voltage range is usually more universal like 5 - 30 Volt.

 

[Julf]

Any practical reason not to use a solid state relay to pull down that SMPS input to GND, which would enable the PSU and the amp itself ?

You still need an external voltage to pull up the input. Not that that is hard to do, but why not just use a transistor instead of a solid state relay?

 

[burkm]

But the external voltage is already there: the 12VDC trigger signal from either a preamp or an AVR or whatever. You just have to route it from i.e. a 3.5 mini socket to that solid state relay, don't you ?
I usually try to follow that "keep it simple Simon..." rule.

 

[Julf]

But the external voltage is already there: the 12VDC trigger signal from either a preamp or an AVR or whatever. You just have to route it from i.e. a 3.5 mini socket to that solid state relay, don't you ?
I usually try to follow that "keep it simple Simon..." rule.

Unfortunately the 12V signal *isn't* there when in "off" (which is when you need it for the hypex input).

 

[Boggit]

Its only there when the triggering device is powered up ie a Pre Amp, while the preamp is off your power amp has a 0V signal on the SMPS stand by input meaning the power amp is on. What you want is a 12V on the input at all times apart from when you want to use the power amp. This would require an external power source or additional little power supply circuit in the amp.

 

[Tom4s]

Taken from the Bel Canto REF600m manual strange

5/12V Trigger: Requires a 3.5mm plug connector with tip at 5 to 12VDC. The Power Switch must be in the ON position for the Trigger to work. When the trigger voltage is set between 5 and 12V the amplifier will go into a low power mode, shutting the LED off and stopping playback.

Judging by the Hypex specifications, Bel Canto seems to have put a voltage regulator on the trigger input. The SMPS1200 requires between 3.3 and 5.5 Volts to go into standby. (Interestingly, the standby voltage specs for SMPS600 and SMPS400 are both different, but neither is 5 to 12 V.)

 

[Julf]

Judging by the Hypex specifications, Bel Canto seems to have put a voltage regulator on the trigger input. The SMPS1200 requires between 3.3 and 5.5 Volts to go into standby. (Interestingly, the standby voltage specs for SMPS600 and SMPS400 are both different, but neither is 5 to 12 V.)

In the data sheets I have, SMPS400, SMPS600 and SMPS1200 all specify as 3.3-12 V for SMPS Standby.

 

[ds23man]

The standby input is driving only a relay in the mains. It disconnects the mains when energized.

 

[Tom4s]

In the data sheets I have, SMPS400, SMPS600 and SMPS1200 all specify as 3.3-12 V for SMPS Standby.

That's what I saw for the SMPS600. The SMPS400 was 3.3 to Vaux (21 V typical). I looked at hypexpro.com for the specs of SMPS1200 and 400, and hypex.nl for SMPS600.

 

[Julf]

The standby input is driving only a relay in the mains. It disconnects the mains when energized.

Ummh, really? In that case it would have been just as easy to use a normally-open as a normally-closed relay...

 

[Julf]

That's what I saw for the SMPS600. The SMPS400 was 3.3 to Vaux (21 V typical). I looked at hypexpro.com for the specs of SMPS1200 and 400, and hypex.nl for SMPS600.

http://www.hypex.nl/docs/SMPS400_datasheet.pdf states "DC voltage on J5:1 - Min 3.3, Max 12 Vdc in section 7.7.

Edit: so does http://www.hypexpro.com/wp-content/uploads/2014/Datasheets/SMPS400_datasheet.pdf

 

[ds23man]

Ummh, really? In that case it would have been just as easy to use a normally-open as a normally-closed relay...

Than you always need a external power supply to switsch it on...........

 

[Julf]

Than you always need a external power supply to switsch it on...........

Ah, yes, true...

 

[Tom4s]

DC voltage on J5:1 - Min 3.3, Max 12 Vdc in section 7.7.

Indeed, I have mistakenly read the amp standby. The SMPS1200 is however different to the other two, and the Bel Canto amp would appear to use some regulation of the trigger voltage.

 

[ds23man]

Strange, the smps1200 uses the same relay configuration.