{"product_id":"viper12a-viper12as-off-line-smps-primary-ic-sop8-730v-induction-cooker-5pack","title":"VIPER12A \/ VIPER12AS Off-Line SMPS Primary IC — SOP-8, 730V, Induction Cooker (5-Pack)","description":"\u003ch2\u003eVIPER12A \/ VIPER12AS Off-Line SMPS Primary IC — SOP-8, 730V, 12W (5-Pack)\u003c\/h2\u003e\u003cp\u003eThe VIPER12A and VIPER12AS are off-line flyback SMPS primary ICs from STMicroelectronics, integrating a PWM controller and a 730V avalanche-rated power MOSFET in a single SOP-8 package. Designed for low-power offline switching power supplies up to 12W, they are widely used in induction cooker auxiliary power supplies, USB chargers, LED drivers, and standby power circuits. The VIPER12AS adds a soft-start function for reduced inrush current.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSOP-8 (SMD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated MOSFET\u003c\/td\u003e\n\u003ctd\u003e730V avalanche-rated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Power\u003c\/td\u003e\n\u003ctd\u003e12W (continuous, open-frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd\u003e60kHz (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStartup Current\u003c\/td\u003e\n\u003ctd\u003e25μA (ultra-low)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Mode\u003c\/td\u003e\n\u003ctd\u003eCurrent-mode PWM + burst mode at light load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOCP, OVP, OTP, auto-restart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVCC Range\u003c\/td\u003e\n\u003ctd\u003e9–38V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eVIPER12A vs VIPER12AS\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eVIPER12A\u003c\/th\u003e\n\u003cth\u003eVIPER12AS\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoft-Start\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes (internal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInrush Current\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eReduced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eStandard charger\/adapter repair\u003c\/td\u003e\n\u003ctd\u003eInduction cooker, sensitive loads\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose VIPER12A \/ VIPER12AS?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated 730V MOSFET\u003c\/strong\u003e — no external power transistor needed, reduces BOM and PCB area\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25μA startup current\u003c\/strong\u003e — ultra-low standby power for energy efficiency compliance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBurst mode at light load\u003c\/strong\u003e — improves efficiency under no-load and standby conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull protection suite\u003c\/strong\u003e — OCP\/OVP\/OTP with auto-restart prevents damage under fault conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTMicroelectronics\u003c\/strong\u003e — industry-standard part with comprehensive application notes (AN2450, AN2458)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible With \/ Common Use Cases\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInduction cooker auxiliary PSU\u003c\/strong\u003e: 5V\/12V standby supply for control board (most common repair use)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB charger \/ phone adapter\u003c\/strong\u003e: 5V\/2A offline flyback design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED driver power supply\u003c\/strong\u003e: Isolated constant-voltage LED supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial standby supply\u003c\/strong\u003e: 5V\/12V auxiliary rail for PLC and industrial controllers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the difference between VIPER12A and VIPER22A?\u003c\/strong\u003e\u003cbr\u003eA: Both are off-line flyback ICs with integrated 730V MOSFET. VIPER12A is rated for up to 12W output; VIPER22A supports up to 22W. Use VIPER22A for higher-power chargers and adapters above 12W.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can I use VIPER12AS as a direct replacement for VIPER12A?\u003c\/strong\u003e\u003cbr\u003eA: Yes — VIPER12AS is pin-compatible with VIPER12A and adds internal soft-start. It is a drop-in upgrade that reduces inrush current stress on the transformer and output capacitors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What reference design should I follow for an induction cooker repair?\u003c\/strong\u003e\u003cbr\u003eA: Refer to STMicroelectronics Application Note AN2450 (“VIPERx2A family design guidelines”) and AN2458 for the induction cooker auxiliary supply reference design. The typical circuit uses VIPER12A with a flyback transformer, TL431 feedback, and PC817 optocoupler.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e5× VIPER12A \/ VIPER12AS Off-Line SMPS Primary IC (SOP-8)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991457321195,"sku":"\u003cnone\u003e","price":6.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/viper12a-viper12as-sop-8-induction-cooker-power-ic.webp?v=1761796472","url":"https:\/\/keszoox.com\/products\/viper12a-viper12as-off-line-smps-primary-ic-sop8-730v-induction-cooker-5pack","provider":"Keszoox","version":"1.0","type":"link"}