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ST Series


Output Proportional to Input
Output Voltage: ST series are available in multiple output voltages ranging from +/-5,000VDC to +/-15,000VDC

Power: 3W
Dimension: 4.00” x 2.00” x 0.85”


Electrical Characteristics & Description
The ST Series is a line of compact high voltage DC to DC converters which have been designed especially for electro-optic applications.  They are rugged, arc resistant, and virtually burn-out proof.  Their high efficiency makes them suited for battery operated high voltage power supplies and equipment.


The output voltage of the ST power supply is directly proportional to the input voltage.  The power supply will start with input voltage as low as 1.5 volts, and will not be damaged by inputs as high as 18 VDC. Each ST supply has an internal bleeder on the output for safety.  The value of the resistor is such that it dissipates less than 0.1 watt at full output voltage.  The output ripple of each supply is typically less than 1% at full power.  Case size is 2.0” x  4.0” x  0.8” high and is composed of an anodized sealed system.  Each unit is encapsulated in a high thermal conductivity epoxy resin which eliminates problems associated with moisture.  All ST power supplies are designed to withstand extremes of shock, vibration, acceleration, and thermal shock in accordance with MIL-STD-810.

The load regulation of an ST power supply is approximately 30% from NO LOAD to FULL LOAD.  To achieve accurate regulation, an external feedback loop may be utilized. All ST’s are reverse input voltage and short circuit protected.  The typical input current at no load for 3 watt models is less than 50 mA.

The ST Series high voltage power supplies are driven by an input voltage of 0 to 12 VDC. The high voltage output power is NOT FLOATING.  The input power return is connected directly to the output high voltage return. The output voltage is nearly linear with respect to input except near the lower input voltage region. Here, the output drops off rapidly as the input is lowered with the minimum input required being 2.0 VDC.

ST power supplies may be driven from a three terminal regulator, or run closed loop with a suitable regulation scheme.  The input capacitance is 10 uF AC bypass. Voutmax is defined as the maximum output voltage of the power supply with the standard 12V input.

Negative output units are available.


Model Output Voltage Output Current Ripple
ST-5P 0 to 5000V 0 to 0.6mA <0.4%
ST-10P 0 to 10000V 0 to 0.3mA <0.4%
ST-15P 0 to 15000V 0 to 0.2mA <0.4%
ST-20P 0 to 20000V 0 to 0.15mA <0.4%
ST-5N 0 to - 5000V 0 to 0.6mA <0.4%
ST-10N 0 to - 10000V 0 to 0.3mA <0.4%
ST-15N 0 to - 15000V 0 to 0.2mA <0.4%
ST-20N 0 to - 20000V 0 to 0.15mA <0.4%

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