specifications subject to change without notice. 03 /13 demo boards high voltage flyback charge circuit available for 95069-1, 95072, 95073, 95074, 95075, 95080 nascentechnology, inc. has developed a series of hi gh voltage flyback charge circuit demonstration boards that allow easy testing of ltcc high voltage flyback transformers. the boards can be operated from an external pulse generator in an unregulated mode or use the provided max1771 controller in a standard current mode control discontinuous flyback configuration for regulated output. the vadj resis tor allows setting the output voltage in regulated mode . the input voltage range of 12 to 40 vdc can be lowered by bypassing the internal regulator and sup plying a 10 vdc aux voltage for the ics. it can be increased by increasing the voltage rating of the i nput capacitors. similarly the output capacitor, ra ted at 1200 vdc can be easily swapped out for higher value s. the peak current limit is set to 2a which can al so be adjusted by changing the sense resistor. the de- sta-co clamp allows mounting and changing transformers without soldering. by removing j3 the secondary can be made floating, however feedback for regulation is disabled (an external opto-isolat or circuit could be substituted). sockets are also provided for quick adjustment of the mosfet snubber capacito r. a current loop is provided for monitoring peak input current. the board comes with a 100 nf capaci tor and 200 mohms sense/discharge resistor. for additional information, contact: daryl schofiel d phone: 605-882-8513, fax: 605-884-2450, e-mail: dsc hofield@nascentechnology.com nascentechnology, inc. 121 airport drive, watertown , sd 57201 www.nascentechnology.com features stand alone or external control easy change out of transformer sockets for snubber cap and vadj resistor test points for each transformer terminal sockets for ics current sense loop ordering information r1015 for d47s, d50s, 95069/73 r1016 for d48s, d58s, 95072/74/75 r1018 for d66s, 95080
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