We need more power Captain!

Often we get a request for a Superpower that can deliver more voltage, more current or more current and voltage than our standard products. Thanks to the patented design, you CAN get more. The SPJ has its TO-220 packaged output device attached to the rear of the PCB. You can remove this device and connect it with "flying leads" so it can be attached to a heat sink, as A. Shan did.

This allows the regulator to dissipate up to the maximum power specified for the output device, which is 60W, without heating the regulator PCB or mounting the entire Superpower on a heat sink as Jonathan Parle did. It does not, however, prevent high current from flowing through the copper PCB traces.

A separate path for load current
(Note! The following is for advanced experimenters.)

Removing the output transistor allows you to wire a Superpower so the load current never flows through the PCB. Connections for this are shown below:
SPJ78 high current connection.
With the TO-220 output transistor removed from the PCB and wired in this manner, the PCB contains the low current regulator control circuitry and the external wiring carries all load current through the external transistor to the load and back. This allows the circuit to deliver more than the normal 2A, potentially up to 5 or 6 amps.

The power transistor is shown in the above example as a Fairchild D44H11, which is the normal SPJ78 output device with rated at 80V, 10A, 60W. However, realize that the SPJ78 is rated at maximum Vin=35V because the maximum voltage for its on–board output capacitor (the tan rectangle on the right side) is 35V.

High power and Vout>30V

Vout is set by an internal resistor and limited by the output capacitor as mentioned above. For Vout higher than 30V you can order a custom Superpower and specify your required Vout on the order. We will build your custom Superpower with the requested output voltage and not add the output capacitor.

You can assemble a high power regulator with an external capacitor rated to your custom Vout as shown here:
SPJ78 high current connection.

Notice the on–board capacitor has been removed and an external capacitor connected from Vout to regulator ground. This should be 100µF or more and have a voltage rating higher than Vout. Also notice the diagram is not to scale—the capacitor will be bigger than the Superpower :-).

Diodes shown in the figure are for protection of the regulator if input voltage falls faster than output voltage, or if Vout gets pulled below ground by some load related condition (e.g. an inductive load). They are typically 1N4007.

A power transistor with higher power rating can be used in place of the standard D44H11. We have tested NJW3218G to be suitable, it is a 250V, 15A, 200W device.

SPJ17 high power circuit

More information coming soon!

SPJ79 high power circuit

More information coming soon!


This site is being gradually updated. If you have any problems please email super@belleson.com

The Industry Standard SPX

Order now from our store.

  • 5V to 30V output
  • World's lowest output impedance
  • Superb ripple rejection (135dBV)
  • Instant step response
  • Extreme low noise
  • TO-220 footprint
  • No thermal pad needed!

High Voltage!

Tube lovers—SPHV is BACK!

  • Variable output 5V to 450V
  • Up to 500mA output current
  • Super low 0.5V drop-out at 100mA
  • Small TO-220 footprint!
  • Low output impedance
  • Fast response
  • Low noise

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SPHP—1000 Watts for your music server!

SPHP, a 10A Superpower with adjustable output voltage from 5V to 100V

  • Same low noise
  • Same blazing step response
  • Same great ripple rejection.
Just lots more current and much higher output voltage. For sale on our order page See more information in the data sheet here.

Build a power supply

A PCB and parts list for building a compact dual positive or positive+negative power supply are on this new page.

Transformer Calculator!

Use the Belleson Transformer Calculator to calculate the minimum Vrms voltage of a transformer for your Superpower based supplies.

It's Official

We're proud to announce the U.S. Patent and Trademark Office has granted patent 8,294,440 to the Superpower design.

Use the Superpower regulator in...

  • Headphone amps
  • DACs
  • Buffers
  • Clocks and reclockers
  • Preamps
  • Microphone preamps
  • Phono stages
  • Phono motors
  • Tube preamps and input stages
  • Line powered guitar effects boxes
  • Anywhere an extremely clean, quiet, dynamic power source is needed