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Dykb Dc-dc Boost Converter High Voltage Dc 3v-5v Step Up To 200v-620v 400v 200v 300v 350vadjustable Power Psu Module Charging - Battery Accessories & Charger Accessories - AliExpress
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High voltage (90-370 VDC) DC/DC Converters, low voltage output (3.3V, 5V, 7.5V, 12V, 13.5V, 15V, 24V, 48V)
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Figure 3 from A NOVEL 1.6 KV HIGH VOLTAGE LOW CURRENT STEP-UP DC-DC CONVERTER WITH COCKCROFT-WALTON VOLTAGE MULTIPLIER FOR POWER SUPPLY MODULES | Semantic Scholar
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