{"id":2494,"date":"2026-05-21T01:20:10","date_gmt":"2026-05-21T01:20:10","guid":{"rendered":"https:\/\/materialparts.com\/uc3854n\/"},"modified":"2026-05-21T01:20:10","modified_gmt":"2026-05-21T01:20:10","slug":"uc3854n","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/uc3854n\/","title":{"rendered":"UC3854N"},"content":{"rendered":"

Productos<\/h2>\n

The UC3854N from Texas Instruments is a power factor correction (PFC) controller implementing average current mode control for continuous conduction mode boost converters. It provides near-unity power factor for off-line power supplies with 16-pin DIP through-hole package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Fabricante<\/td>\nTexas Instruments<\/td>\n<\/tr>\n
Tipo<\/td>\nPower Factor Correction Controller<\/td>\n<\/tr>\n
Control Mode<\/td>\nAverage Current Mode<\/td>\n<\/tr>\n
Topology<\/td>\nBoost (CCM)<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n10.5V to 20V<\/td>\n<\/tr>\n
Switching Frequency<\/td>\nUp to 200kHz (programmable)<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n7.5V +-2%<\/td>\n<\/tr>\n
Multiplier Output<\/td>\nCurrent mode multiplier<\/td>\n<\/tr>\n
OVP Comparator<\/td>\nYes<\/td>\n<\/tr>\n
UVLO Threshold<\/td>\n10.5V on \/ 9.5V off<\/td>\n<\/tr>\n
Paquete<\/td>\n16-PDIP (19.3 x 6.35mm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0C to +70C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Average current mode control for CCM boost PFC<\/li>\n
  • Near-unity power factor correction<\/li>\n
  • Internal 7.5V precision reference<\/li>\n
  • Analog multiplier\/divider for line voltage feedforward<\/li>\n
  • Overshoot and overvoltage protection<\/li>\n
  • Undervoltage lockout (UVLO)<\/li>\n
  • Programmable switching frequency up to 200kHz<\/li>\n
  • Soft-start capability<\/li>\n
  • Current error amplifier with wide bandwidth<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Off-line switch-mode power supply PFC pre-regulators<\/li>\n
    • Industrial power supplies requiring PFC<\/li>\n
    • Lighting ballast power factor correction<\/li>\n
    • Server and telecom power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The UC3854N from Texas Instruments is a power factor correction (PFC) controller implementing average current mode control for continuous conduction mode boost converters. It provides near-unity power factor for off-line power supplies with 16-pin DIP through-hole package. Key Specifications Manufacturer Texas Instruments Type Power Factor Correction Controller Control Mode Average Current Mode Topology […]<\/p>\n","protected":false},"author":2,"featured_media":2778,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-2494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"Average current mode PFC controller, CCM boost, 200kHz, 7.5V ref, 16-PDIP","date_code":"","package_case":"16-PDIP (19.3 x 6.35 x 4.57mm)","in_stock":4120,"datasheet":"https:\/\/www.ti.com\/product\/UC3854","price":"$2.45 @ 1ku","product_introduction":"The Texas Instruments UC3854N is a power factor correction controller that provides active power factor correction for off-line power supplies by shaping the input line current to match the input line voltage waveform. Using average current mode control with continuous conduction mode boost topology, the device achieves near-unity power factor. The UC3854 integrates a voltage error amplifier, current error amplifier, analog multiplier\/divider with line voltage feedforward, PWM comparator, and oscillator. The internal 7.5V precision reference provides stable voltage regulation. Overvoltage protection, undervoltage lockout, and soft-start features ensure safe and reliable operation. The device is the industry-standard PFC controller widely used in medium to high power applications.","working_principle":"The UC3854N operates through three nested control loops: 1) Voltage Loop: The voltage error amplifier compares a fraction of the boost output voltage with the 7.5V internal reference, producing an error signal VEAO that represents the required power level. 2) Multiplier: The analog multiplier divides VEAO by the square of the average input voltage (feedforward), then multiplies by the instantaneous rectified line voltage. This produces a current reference signal with the correct sinusoidal shape and amplitude for near-unity power factor. 3) Current Loop: The current error amplifier compares the multiplier output with the actual inductor current sensed through a current shunt. The average current mode control ensures the inductor current accurately tracks the sinusoidal reference regardless of inductor ripple. The PWM comparator generates gate drive pulses to the external boost MOSFET.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>GND<\/td>Ground<\/td>Ground<\/td><\/tr>
      2<\/td>PKLMT<\/td>Input<\/td>Peak current limit comparator input<\/td><\/tr>
      3<\/td>CA OUT<\/td>Output<\/td>Current amplifier output<\/td><\/tr>
      4<\/td>ISENSE<\/td>Input<\/td>Current sense inverting input<\/td><\/tr>
      5<\/td>MULT OUT<\/td>Output<\/td>Multiplier output (current reference)<\/td><\/tr>
      6<\/td>IAC<\/td>Input<\/td>AC current input (rectified line)<\/td><\/tr>
      7<\/td>VA OUT<\/td>Output<\/td>Voltage amplifier output<\/td><\/tr>
      8<\/td>VREF<\/td>Output<\/td>7.5V reference output<\/td><\/tr>
      9<\/td>VCC<\/td>Power<\/td>Supply voltage<\/td><\/tr>
      10<\/td>GTDRV<\/td>Output<\/td>Gate drive output<\/td><\/tr>
      11<\/td>VSENSE<\/td>Input<\/td>Voltage amplifier inverting input<\/td><\/tr>
      12<\/td>RSET<\/td>Input<\/td>Oscillator charge current set resistor<\/td><\/tr>
      13<\/td>SS<\/td>I\/O<\/td>Soft-start capacitor<\/td><\/tr>
      14<\/td>CT<\/td>I\/O<\/td>Oscillator timing capacitor<\/td><\/tr>
      15<\/td>VFF<\/td>Input<\/td>Feedforward voltage input<\/td><\/tr>
      16<\/td>VRMS<\/td>Input<\/td>RMS line voltage input (feedforward)<\/td><\/tr><\/table>","application_scenarios":"
      • Off-line 300W-2000W SMPS PFC pre-regulator stage<\/li>
      • Server and telecom power supply with active PFC<\/li>
      • Industrial equipment meeting IEC 61000-3-2 harmonic limits<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        TI<\/td>UCC3817N<\/td>16-PDIP<\/td>Lower power PFC controller<\/td><\/tr>
        TI<\/td>UC3854BN<\/td>16-PDIP<\/td>Enhanced version with improved performance<\/td><\/tr>
        Infineon<\/td>ICE1PCS01GXKLA1<\/td>8-DIP<\/td>Simplified PFC controller<\/td><\/tr>
        ST<\/td>L6562AT<\/td>DIP-8<\/td>Transition-mode PFC controller<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2494","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=2494"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/2494\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media\/2778"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=2494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=2494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=2494"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=2494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}