{"product_id":"ncp1399ac-ncp1399acdr2g-half-bridge-resonant-controller","title":"NCP1399AC NCP1399ACDR2G Half-Bridge Resonant Controller","description":"\u003ch2\u003eNCP1399AC Half-Bridge Resonant Controller – Mining PSU Primary-Side Repair\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNCP1399AC\u003c\/strong\u003e (\u003cstrong\u003eNCP1399ACDR2G\u003c\/strong\u003e) is a \u003cstrong\u003ehalf-bridge resonant converter controller\u003c\/strong\u003e in a \u003cstrong\u003e16-SOIC\u003c\/strong\u003e package with integrated \u003cstrong\u003e600V gate drivers\u003c\/strong\u003e. It operates across \u003cstrong\u003e20kHz–750kHz\u003c\/strong\u003e with a supply range of \u003cstrong\u003e9.5–20V\u003c\/strong\u003e and includes a comprehensive protection suite: overload, overcurrent, brown-out, open optocoupler, OVP and OTP. The integrated high-voltage drivers simplify circuit layout and reduce external component count — making it a drop-in replacement for failed controllers in mining PSU designs with PFC front stages.\u003c\/p\u003e\n\u003ch3\u003eWhy Resonant Controllers Fail in Mining PSUs\u003c\/h3\u003e\n\u003cp\u003eThe resonant controller generates the precise timing signals that drive the half-bridge MOSFETs. Voltage transients, thermal stress from sustained full-load operation, or capacitive-mode events during overload can damage the controller IC. A failed NCP1399AC causes the PSU to produce no output or oscillate erratically, often with audible transformer buzz. The operating temperature range of \u003cstrong\u003e-40°C to 125°C\u003c\/strong\u003e provides ample margin, but cumulative stress over months of continuous operation eventually takes its toll.\u003c\/p\u003e\n\u003ch3\u003eReplacement Procedure\u003c\/h3\u003e\n\u003cp\u003eDisconnect mains and discharge all capacitors. Locate the NCP1399AC on the primary control board — it is a 16-pin SOIC near the gate drive circuit. Desolder, clean pads, install with pin 1 aligned and reflow. If the controller failure caused MOSFET damage, replace those as well. Power through a variac under progressive load and verify clean, stable output.\u003c\/p\u003e\n\u003ch4\u003eNCP1399AC Controller Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eParameter\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 6px 12px;\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePart Number\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNCP1399ACDR2G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eTopology\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eHalf-bridge resonant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eFrequency Range\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e20kHz – 750kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e9.5–20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eGate Drivers\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eIntegrated 600V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eProtections\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eOLP, OCP, brown-out, OVP, OTP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003ePackage\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e16-SOIC (14 leads)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eTemperature\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003e-40°C to 125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eCondition\u003c\/td\u003e\n\u003ctd style=\"text-align: left; padding: 6px 12px;\"\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRelated PSU Resonant Controllers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/l6599ad-power-supply-controller-resonant-converter-controller\"\u003eL6599AD Resonant Converter Controller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/l6599dtr-l6599d-l6599-power-supply-resonant-controller-bitmain-avalon-psu\"\u003eL6599D LLC Resonant Controller – Bitmain \/ Avalon PSU\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lnk306pn-converter-offline-buck-boost-flyback-topology-66khz-power-supply-unit-repair\"\u003eLNK306PN Offline Converter – PSU Repair\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/top247yn-converter-offline-flyback-topology-66khz-132khz-power-supply-unit\"\u003eTOP247YN Offline Flyback Converter – PSU\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eRepairing mining PSU control stages? \u003ca href=\"mailto:contact@lys-sz.com\"\u003eContact us at contact@lys-sz.com\u003c\/a\u003e for resonant controllers, gate drivers and matched MOSFETs.\u003c\/p\u003e\n\u003cp\u003eWorldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":41724736733363,"sku":null,"price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/NCP1399AC-NCP1399ACDR2G-Converter-Offline-Half-Bridge-Topology-20kHz-750kHz-16SOIC.webp?v=1746532216","url":"https:\/\/lys-sz.com\/products\/ncp1399ac-ncp1399acdr2g-half-bridge-resonant-controller","provider":"LYS Shenzhen","version":"1.0","type":"link"}