Any idea how much current the +12V and -12V rails draw on the preamp?
I have two pre amp boards. I am trying to decide to run them from silent switcher from diyaudiostore or from single pair of Hypex HPR12/HNR12
I have two pre amp boards. I am trying to decide to run them from silent switcher from diyaudiostore or from single pair of Hypex HPR12/HNR12
Alexcp says:
memory serves, it is about 70mA on each rail. Each of the four LM4562 needs about 10mA, plus each of the three relays needs about the same.
HxR12 modules are good for 100mA and up to 0.5W dissipation each, so perhaps two BPPBP boards would be too much for just one pair of HxR12s.
Jan Didden’s SilentSwitcher is good for 150mA, and apparently even more if you use a 9V source instead of 5V.
Quote:
The current specs (150mA at the +/-15V and 0.5A at the 6/5/3.3V simultaneously) are such that they can be used with a standard 5V/2.1A USB charger. They are not actual limits; if you use a higher input voltage source like batteries (max 10VDC) or a wallwart delivering 9V at 2A, the available output currents are doubled.
Note that most USB chargers, even high power ones, provide less than 5V under load. I don’t know how this may affect the SilentSwitcher.
memory serves, it is about 70mA on each rail. Each of the four LM4562 needs about 10mA, plus each of the three relays needs about the same.
HxR12 modules are good for 100mA and up to 0.5W dissipation each, so perhaps two BPPBP boards would be too much for just one pair of HxR12s.
Jan Didden’s SilentSwitcher is good for 150mA, and apparently even more if you use a 9V source instead of 5V.
Quote:
The current specs (150mA at the +/-15V and 0.5A at the 6/5/3.3V simultaneously) are such that they can be used with a standard 5V/2.1A USB charger. They are not actual limits; if you use a higher input voltage source like batteries (max 10VDC) or a wallwart delivering 9V at 2A, the available output currents are doubled.
Note that most USB chargers, even high power ones, provide less than 5V under load. I don’t know how this may affect the SilentSwitcher.
It's not critical, the SS works down to 3.7V. But the limits are set by the internal switch current limits, that is the reason higher input voltages allow higher output currents.
Jan
Jan