{"id":1543,"date":"2026-08-24T01:19:23","date_gmt":"2026-08-23T19:49:23","guid":{"rendered":"https:\/\/capkit.in\/?post_type=product&p=1543"},"modified":"2026-08-24T01:20:45","modified_gmt":"2026-08-23T19:50:45","slug":"uc3842an-pwm-controller-ic","status":"publish","type":"product","link":"https:\/\/capkit.in\/?product=uc3842an-pwm-controller-ic","title":{"rendered":"UC3842AN PWM Controller IC"},"content":{"rendered":"

UC3842AN<\/strong> is a high-performance current mode PWM controller IC<\/strong> designed for switch mode power supply (SMPS), DC-DC converters, battery chargers, and power inverter applications. It provides complete PWM control with an internal oscillator, error amplifier, current sensing circuit, voltage reference, and high-current output driver for controlling external MOSFETs.<\/p>\n

UC3842AN is widely used in offline flyback converters and switching power supply designs because of its fast response, accurate current control, and built-in protection features. The IC helps improve power supply efficiency and provides reliable switching operation with fewer external components.<\/p>\n

\n

Features<\/h2>\n
    \n
  • Current mode PWM control<\/li>\n
  • Fixed frequency operation<\/li>\n
  • Operating frequency up to 500kHz<\/li>\n
  • Internal 5V precision voltage reference<\/li>\n
  • Low startup current<\/li>\n
  • High current totem-pole output driver<\/li>\n
  • Direct MOSFET gate drive capability<\/li>\n
  • Cycle-by-cycle current limiting<\/li>\n
  • Undervoltage lockout (UVLO) protection<\/li>\n
  • Fast switching response<\/li>\n
  • Excellent load regulation<\/li>\n
  • Available in 8-pin DIP package<\/li>\n<\/ul>\n
    \n

    Specifications<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    \n
    Specifications<\/h6>\n<\/th>\n
    		Value<\/th>\n<\/tr>\n<\/thead>\n
    IC Type<\/td>\nPWM Controller<\/td>\n<\/tr>\n
    Model<\/td>\nUC3842AN<\/td>\n<\/tr>\n
    Package<\/td>\nDIP-8<\/td>\n<\/tr>\n
    Control Mode<\/td>\nCurrent Mode PWM<\/td>\n<\/tr>\n
    Supply Voltage<\/td>\n12V to 28V<\/td>\n<\/tr>\n
    Reference Voltage<\/td>\n5V<\/td>\n<\/tr>\n
    Maximum Frequency<\/td>\n500kHz<\/td>\n<\/tr>\n
    Output Drive Current<\/td>\nHigh Current Gate Drive<\/td>\n<\/tr>\n
    Duty Cycle<\/td>\nUp to 100%<\/td>\n<\/tr>\n
    Switching Type<\/td>\nFixed Frequency<\/td>\n<\/tr>\n
    Operating Temperature<\/td>\n0\u00b0C to +70\u00b0C<\/td>\n<\/tr>\n
    Mounting Type<\/td>\nThrough Hole<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Applications<\/h2>\n
      \n
    • SMPS power supplies<\/li>\n
    • AC-DC adapters<\/li>\n
    • Flyback converters<\/li>\n
    • DC-DC converters<\/li>\n
    • Battery chargers<\/li>\n
    • LED drivers<\/li>\n
    • UPS systems<\/li>\n
    • Inverter circuits<\/li>\n
    • Industrial power supplies<\/li>\n
    • Switching regulators<\/li>\n<\/ul>\n
      \n

      Advantages<\/h2>\n
        \n
      • High efficiency power conversion<\/li>\n
      • Simple SMPS circuit design<\/li>\n
      • Reliable MOSFET control<\/li>\n
      • Built-in protection features<\/li>\n
      • Fast transient response<\/li>\n
      • Low external component requirement<\/li>\n
      • Widely used and easy to replace<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

        UC3842AN is a current mode PWM controller IC used for SMPS, flyback converters, DC-DC converters, and inverter applications. It provides accurate PWM control, MOSFET drive output, current protection, and stable switching performance.<\/p>\n","protected":false},"featured_media":1545,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[49],"product_tag":[433,366,102,434,364,390,371,360,363,432,431,430],"class_list":["post-1543","product","type-product","status-publish","has-post-thumbnail","product_cat-power-ic","product_tag-current-mode-pwm","product_tag-dc-dc-converter-ic","product_tag-dip8-ic","product_tag-flyback-controller","product_tag-inverter-ic","product_tag-mosfet-driver-ic","product_tag-power-supply-ic","product_tag-pwm-controller-ic","product_tag-smps-ic","product_tag-switching-regulator-ic","product_tag-uc3842-ic","product_tag-uc3842an","first","instock","taxable","shipping-taxable","purchasable","product-type-simple","col-xs-6 col-sm-4","col-md-3 col-lg-3","un-4-cols"],"_links":{"self":[{"href":"https:\/\/capkit.in\/index.php?rest_route=\/wp\/v2\/product\/1543","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/capkit.in\/index.php?rest_route=\/wp\/v2\/product"}],"about":[{"href":"https:\/\/capkit.in\/index.php?rest_route=\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/capkit.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1543"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/capkit.in\/index.php?rest_route=\/wp\/v2\/media\/1545"}],"wp:attachment":[{"href":"https:\/\/capkit.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1543"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/capkit.in\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_cat&post=1543"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/capkit.in\/index.php?rest_route=%2Fwp%2Fv2%2Fproduct_tag&post=1543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}