•0 to 30kV, 35kV, or 40kV output

•4, 15 or 30 watts of output power

•Wide input voltage range

•Indefinite output short-circuit protection

•Maximum Iout capability down to 0 Volts

•Fixed-frequency, low-stored-energy design

•Output current & voltage monitors

•>400,000 Hr. MTBF @ 65°C

•UL, CUL, IEC-60950-1, and Demko Recognized

GENERAL INFORMATION: The "30A–40A" Series regulated high-voltage DC-DC converters are an extension of the "A" Series, directly addressing the needs of the miniature PCB or chassis-mount >=30kV application. Designed and built utilizing state-of-the-art power-conversion topology, these units feature surfacemount technology and encapsulation techniques providing high reliability and low cost.

COMPATIBILITY: The Series "30A–40A" match the standard "A" Series for design methodology, wide input range, remote control, enable/disable, reference, shock & vibration.

HIGH VOLTAGE OUTPUT: The "30A–40A" Series is a non-isolated unipolar converter. Positive or negative output must be specified. Output is adjustable from 0 to 30kV, 35kV or 40kV. As the output voltage is reduced towards 0, the maximum current capability remains unchanged.

HIGH VOLTAGE OUTPUT TERMINATION: The "30A–40A" series utilizes 40kV PVC wire. All flying leads are 18" and can be terminated with a variety of industry-standard connectors. Contact customer service for details.

OUTPUT VOLTAGE MONITOR: The "30A–40A" Series features a 1000:1 voltage monitor. The monitor has an output impedance calibrated for use with a 10-Meg? input impedance meter. Overall accuracy is ±2.5% with a temperature coefficient of ±200 ppm per°C. The "30A" uses a 1.5 Gig?/1.78 Meg? divider. The "35A" uses a 5 Gig?/10 Meg? divider. The "40A" uses a 5 Gig?/10 Meg? divider.

For "30A–40A" applications requiring a different scale factor, such as a 0 to 5VDC ADC compatible design, a single, external, low-voltage resistor may be added in parallel with the output voltage monitor, to rescale its output. The voltage monitor is output on pin 9 and referenced to signal ground pin 5.

OUTPUT CURRENT MONITOR: The "30A–40A" Series is equipped with an output current monitor. Current from the high-voltage multiplier can be monitored by reading the voltage appearing between output monitor pin 3 and signal ground pin 5. The monitor has an output impedance of >20k?. Internal voltage dividers create a small, linear-offset voltage. See Application Note AP-13 for more details.

SHIELDING: The "30A–40A" Series models are available with optional six-sided, wrap-around Mu-Metal Shielding. This shielding attenuates magnetic and electrostatic emissions, while shielding internal circuitry from outside noise, thereby reducing overall output ripple by as much as 25% to 50% when combined with the Ripple Stripper® filter.

MECHANICAL: The "30A–40A" Series converters are in PCB mountable plastic cases requiring footprints of only 11.1in² to 12.75in² and volumes of only 11.7in³ to 16.25in³. Mounting plates and brackets are available for chassis mounting. Also available is a metal RF-tight PCB/chassis-mount package. See Application Note 6 for thermal considerations and mounting configurations. All models are available with optional "-M" six-sided, wrap-around Mu-Metal Shielding. Despite their high efficiency, the compact PCB-mounted units require the optional "-H" factory-installed heat sink or an equivalent customer-installed device in high-temperature applications.

ENVIRONMENT: The "30A–40A" Series provides full power operation at case temperatures from -40 to +65°C. All units receive a 24- hour burn-in prior to final test. Extended temperature range is available along with other enhanced capabilities. Please contact the factory.