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MONO-DUAL
Power Supply Module
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There is often the need to generate a +ve/-ve power supply from a single power supply input such as a battery. The MONO-DUAL Power Supply Module provides this feature by utilising a High Current Charge Pump DC-to-DC Converter to generate a negative-voltage power rail of equal amplitude to the generated positive-voltage rail.. A trimmer adjustment on the pcb allows the output voltage to be set to common voltage supplies of 9V, 12V and 15V (actual range is from around 8V to 17V) assuming a suitably rated input voltage is provided (typically allow for an input differential of 5V). The module can be powered from a DC power supply or a low-voltage AC power supply (the AC power supply must have floating outputs and will require a separate EARTH connection to the module, the DC power supply can have floating outputs or the negative pin connected to EARTH). In applications where you already have a well regulated input voltage, you can bypass the onboard input rectifier and regulator and use the module to simply create a negative voltage equivalent to the input voltage. For example, feeding the voltage from a 9V battery to a modified module will generate a -9V output. NOTE: This module is NOT a fully blown dual-rail power supply and is intended mainly for applications where a low-current negative rail is required, for example the MFOS SoundLab or our 1U-based MIDI2SDS(X2). The MONO-DUAL Power Supply will provide around 60mA with the negative rail remaining within 10% of the positive rail and will source over 100mA with a higher differential between the positive and negative rail voltages. If your application requires high current on the negative rail then you should use a conventional dual-rail power supply such as our PSU-2. |