{"id":2987,"date":"2026-05-29T01:31:56","date_gmt":"2026-05-29T01:31:56","guid":{"rendered":"https:\/\/materialparts.com\/uc3846n\/"},"modified":"2026-05-29T01:31:56","modified_gmt":"2026-05-29T01:31:56","slug":"uc3846n","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/uc3846n\/","title":{"rendered":"UC3846N"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The UC3846N from Texas Instruments is a dual-ended current mode PWM controller operating at up to 500 kHz. Housed in a 16-pin PDIP package, it provides all necessary features for fixed-frequency current-mode control schemes with minimal external components. The device features dual totem-pole outputs capable of 500 mA peak, making it suitable for Boost, Flyback, Forward, Half-Bridge, and Push-Pull topologies.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0637\u0648\u0628\u0648\u0644\u0648\u062c\u064a\u0627<\/td>\nBoost, Flyback, Forward, Half-Bridge, Push-Pull<\/td>\n<\/tr>\n
\u062a\u0631\u062f\u062f \u0627\u0644\u062a\u062d\u0648\u064a\u0644<\/td>\nUp to 500 kHz<\/td>\n<\/tr>\n
Max Duty Cycle<\/td>\n50%<\/td>\n<\/tr>\n
Output Peak Current<\/td>\n500 mA (totem-pole)<\/td>\n<\/tr>\n
\u0646\u0637\u0627\u0642 \u062c\u0647\u062f \u0627\u0644\u0625\u0645\u062f\u0627\u062f<\/td>\n7.7 V to 40 V<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n5.1 V (\u00b11%)<\/td>\n<\/tr>\n
\u062a\u064a\u0627\u0631 \u0627\u0644\u062a\u0647\u062f\u0626\u0629<\/td>\n17 mA<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n0\u00b0C to 70\u00b0C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\n16-Pin PDIP<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Automatic feedforward compensation<\/li>\n
  • Programmable pulse-by-pulse current limiting<\/li>\n
  • Automatic symmetry correction in push-pull configuration<\/li>\n
  • Differential current sense amplifier with wide common mode range<\/li>\n
  • Double-pulse suppression<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n
  • Soft-start capability<\/li>\n
  • Shutdown terminal with latch-off option<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Switch-mode power supplies (SMPS)<\/li>\n
    • Push-pull and half-bridge converters<\/li>\n
    • Battery charger circuits<\/li>\n
    • DC-DC converter modules<\/li>\n
    • Industrial power systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The UC3846N from Texas Instruments is a dual-ended current mode PWM controller operating at up to 500 kHz. Housed in a 16-pin PDIP package, it provides all necessary features for fixed-frequency current-mode control schemes with minimal external components. The device features dual totem-pole outputs capable of 500 mA peak, making it suitable for […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-2987","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Dual-ended 500kHz current mode PWM controller, 500mA totem-pole outputs, 50% max duty cycle","date_code":"","package_case":"PDIP-16 (19.3 x 6.35 x 4.57 mm)","in_stock":8103,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/uc3846.pdf","price":"$2.785 @ 1ku","product_introduction":"The UC3846N is a member of the UC1846\/7 family of current mode PWM controllers from Texas Instruments. Designed for dual-ended power converter topologies, it integrates a differential current sense amplifier, an error amplifier, an oscillator with synchronization capability, and dual totem-pole output stages. The current mode control architecture provides improved line regulation, enhanced load response, and a simpler control loop design compared to voltage mode control. The device is optimized for push-pull, half-bridge, and bridge converter applications where automatic symmetry correction and pulse-by-pulse current limiting are critical for reliable operation.","working_principle":"The UC3846N operates using current mode control where the output inductor current is sensed and used as the feedback variable. The oscillator generates a clock signal that sets the switching frequency (up to 500 kHz). The error amplifier compares a scaled version of the output voltage with the internal 5.1 V reference, producing a control voltage. The current sense amplifier measures the inductor current through a differential input. The PWM comparator compares the current sense signal against the error amplifier output to determine the pulse width. Dual totem-pole outputs alternate based on a flip-flop, driving external power switches in push-pull or bridge configurations. Built-in UVLO ensures the device only operates when the supply voltage exceeds 7.7 V.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>C\/S+<\/td>Input<\/td>Current sense non-inverting input<\/td><\/tr>
      2<\/td>C\/S-<\/td>Input<\/td>Current sense inverting input<\/td><\/tr>
      3<\/td>COMP<\/td>I\/O<\/td>Error amplifier output \/ PWM comparator input<\/td><\/tr>
      4<\/td>VREF<\/td>Output<\/td>5.1V reference output<\/td><\/tr>
      5<\/td>RT<\/td>I\/O<\/td>Oscillator timing resistor<\/td><\/tr>
      6<\/td>CT<\/td>I\/O<\/td>Oscillator timing capacitor<\/td><\/tr>
      7<\/td>SYNC<\/td>I\/O<\/td>Oscillator synchronization<\/td><\/tr>
      8<\/td>A OUT<\/td>Output<\/td>Output A (totem-pole)<\/td><\/tr>
      9<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      10<\/td>B OUT<\/td>Output<\/td>Output B (totem-pole)<\/td><\/tr>
      11<\/td>VC<\/td>Power<\/td>Output stage supply voltage<\/td><\/tr>
      12<\/td>VIN<\/td>Power<\/td>Input supply voltage<\/td><\/tr>
      13<\/td>SHUTDOWN<\/td>Input<\/td>Shutdown control<\/td><\/tr>
      14<\/td>E\/A+<\/td>Input<\/td>Error amplifier non-inverting input<\/td><\/tr>
      15<\/td>E\/A-<\/td>Input<\/td>Error amplifier inverting input<\/td><\/tr>
      16<\/td>SOFT START<\/td>I\/O<\/td>Soft-start capacitor connection<\/td><\/tr><\/table>","application_scenarios":"
      • Push-pull DC-DC converters for telecom power supplies<\/li>
      • Half-bridge converters for industrial power systems<\/li>
      • Battery chargers with current limiting requirements<\/li>
      • Modular power supply systems requiring parallel operation<\/li>
      • Offline flyback converters with current mode control<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Texas Instruments<\/td>UC3846DW<\/td>SOIC-16<\/td>SMD version of UC3846N<\/td><\/tr>
        Texas Instruments<\/td>UC3847N<\/td>PDIP-16<\/td>High outputs in OFF state variant<\/td><\/tr>
        onsemi<\/td>UC3846N<\/td>PDIP-16<\/td>Pin-compatible equivalent<\/td><\/tr>
        Texas Instruments<\/td>UC2846N<\/td>PDIP-16<\/td>Extended temp range (-40 to 85\u00b0C)<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2987","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=2987"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/2987\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=2987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=2987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=2987"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=2987"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}