{"id":2521,"date":"2026-05-22T03:29:14","date_gmt":"2026-05-22T03:29:14","guid":{"rendered":"https:\/\/materialparts.com\/viper22astr-e\/"},"modified":"2026-05-22T03:29:14","modified_gmt":"2026-05-22T03:29:14","slug":"viper22astr-e","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/viper22astr-e\/","title":{"rendered":"VIPER22ASTR-E"},"content":{"rendered":"

Productos<\/h2>\n

The VIPER22ASTR-E from STMicroelectronics is an off-line converter IC that combines a current-mode PWM controller with a high-voltage power MOSFET (730V breakdown) on the same chip. Operating at a fixed 60kHz switching frequency, it supports wide VDD voltage range of 9V to 38V and integrates multiple protection features including overtemperature, overcurrent, and overvoltage protection with auto-restart.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n
MOSFET Breakdown Voltage<\/td>\n730V<\/td>\n<\/tr>\n
RDS(on)<\/td>\n17 ohm max<\/td>\n<\/tr>\n
Drain Current<\/td>\n0.7A nominal<\/td>\n<\/tr>\n
Switching Frequency<\/td>\n60kHz fixed<\/td>\n<\/tr>\n
VDD Range<\/td>\n9V to 38V<\/td>\n<\/tr>\n
Output Power (SO-8)<\/td>\n7W wide range, 12W European<\/td>\n<\/tr>\n
Control Mode<\/td>\nCurrent mode PWM<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40C to +150C<\/td>\n<\/tr>\n
Paquete<\/td>\nSO-8<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Integrated 730V power MOSFET and PWM controller<\/li>\n
  • Fixed 60kHz switching frequency<\/li>\n
  • Wide VDD voltage range (9V to 38V)<\/li>\n
  • High-voltage startup current source<\/li>\n
  • Automatic burst mode at light load<\/li>\n
  • Overvoltage protection in HICCUP mode<\/li>\n
  • Overtemperature, overcurrent, and overvoltage protection with auto-restart<\/li>\n
  • Auxiliary undervoltage lockout with hysteresis<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Battery charger adapters (5-12W)<\/li>\n
    • TV and monitor standby power supplies<\/li>\n
    • LED driver power supplies<\/li>\n
    • Motor control auxiliary supplies<\/li>\n
    • Smart meter power modules<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The VIPER22ASTR-E from STMicroelectronics is an off-line converter IC that combines a current-mode PWM controller with a high-voltage power MOSFET (730V breakdown) on the same chip. Operating at a fixed 60kHz switching frequency, it supports wide VDD voltage range of 9V to 38V and integrates multiple protection features including overtemperature, overcurrent, and overvoltage […]<\/p>\n","protected":false},"author":2,"featured_media":2588,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,29],"tags":[],"chip_brand":[142],"class_list":["post-2521","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-st"],"acf":{"brief_explanation":"Off-line Converter IC, 730V MOSFET, 60kHz, 7-12W, SO-8","date_code":"","package_case":"SO-8 (4.9 x 3.9 x 1.75 mm)","in_stock":12164,"datasheet":"https:\/\/www.st.com\/en\/power-management\/viper22a-e.html","price":"$0.46 @ 1ku","product_introduction":"The VIPER22ASTR-E from STMicroelectronics is an integrated off-line converter combining a current-mode PWM controller and a 730V power MOSFET on a single chip. Operating at a fixed 60kHz frequency, it delivers up to 7W (wide range 85-265VAC) or 12W (European 195-265VAC) in the SO-8 package. The device features a wide VDD range (9-38V) accommodating auxiliary supply variations, automatic burst mode for light-load efficiency, and comprehensive protection including overtemperature, overcurrent, and overvoltage with auto-restart capability.","working_principle":"The VIPER22ASTR-E integrates a high-voltage startup current source, PWM controller, and power MOSFET in a monolithic design. At startup, the internal current source charges the VDD capacitor through the drain pin until the UVLO threshold is reached. The PWM controller then begins switching the MOSFET at 60kHz, regulated by current-mode control. The feedback pin (FB) receives current from an optocoupler or auxiliary winding, controlling the duty cycle. When the output is lightly loaded, the device automatically enters burst mode by skipping switching cycles, reducing power consumption. Protection circuits monitor VDD for overvoltage, junction temperature for overtemperature, and drain current for overcurrent conditions.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Power<\/td>Supply voltage (9-38V)<\/td><\/tr>
      2<\/td>FB<\/td>Control<\/td>Feedback input from optocoupler<\/td><\/tr>
      3<\/td>SOURCE<\/td>Power<\/td>MOSFET source \/ current sense<\/td><\/tr>
      4<\/td>DRAIN<\/td>Power<\/td>MOSFET drain \/ HV startup<\/td><\/tr>
      5-8<\/td>DRAIN<\/td>Power<\/td>MOSFET drain connections<\/td><\/tr><\/table>","application_scenarios":"
      • Small power AC-DC adapters and battery chargers (5-12W)<\/li>
      • TV and monitor standby power supplies<\/li>
      • LED lighting driver power supplies<\/li>
      • Motor control board auxiliary power<\/li>
      • Smart meter and IoT device power modules<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        STMicroelectronics<\/td>VIPER12ASTR-E<\/td>SO-8<\/td>Lower power version (5W)<\/td><\/tr>
        STMicroelectronics<\/td>VIPER22ADIP-E<\/td>DIP-8<\/td>Through-hole version (12W)<\/td><\/tr>
        Power Integrations<\/td>LNK304DN<\/td>DIP-8<\/td>Non-isolated buck converter<\/td><\/tr>
        onsemi<\/td>NCP1014ST<\/td>SOT-223<\/td>Similar monolithic off-line converter<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=2521"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2521\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media\/2588"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=2521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=2521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=2521"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=2521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}