{"id":7570,"date":"2026-06-26T04:40:03","date_gmt":"2026-06-26T04:40:03","guid":{"rendered":"https:\/\/materialparts.com\/uc3846dwtr\/"},"modified":"2026-06-26T04:40:03","modified_gmt":"2026-06-26T04:40:03","slug":"uc3846dwtr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/uc3846dwtr\/","title":{"rendered":"UC3846DWTR"},"content":{"rendered":"

Productos<\/h2>\n

The UC3846DWTR from Texas Instruments is a dual-output 500kHz current-mode PWM controller with differential current sense, programmable current limit, and shutdown function in SOIC-16 package.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Topology<\/td>\nPush-Pull, Half-Bridge, Full-Bridge, Forward, Flyback, Boost, Buck<\/td>\n<\/tr>\n
Control Method<\/td>\nCurrent Mode PWM<\/td>\n<\/tr>\n
Number of Outputs<\/td>\n2 (totem-pole, 500mA peak)<\/td>\n<\/tr>\n
Switching Frequency<\/td>\nUp to 500 kHz<\/td>\n<\/tr>\n
Maximum Duty Cycle<\/td>\n50% (push-pull)<\/td>\n<\/tr>\n
Tensi\u00f3n de alimentaci\u00f3n<\/td>\n8.2V to 40V (UVLO threshold)<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n5.1V +\/-1% trimmed bandgap<\/td>\n<\/tr>\n
Current Sense Amplifier<\/td>\nDifferential, wide common mode<\/td>\n<\/tr>\n
Supply Current<\/td>\n21 mA max<\/td>\n<\/tr>\n
Soft Start<\/td>\nYes (external capacitor)<\/td>\n<\/tr>\n
Shutdown<\/td>\nYes (pin 16, 350mV threshold)<\/td>\n<\/tr>\n
Paquete<\/td>\nSOIC-16 (DW suffix)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n0 to +70 C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Automatic feedforward compensation for line regulation<\/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 for robust operation<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • Telecommunication power converters<\/li>\n
    • Industrial power supplies with push-pull topology<\/li>\n
    • Half-bridge and full-bridge DC-DC converters<\/li>\n
    • Forward converter with current-mode control<\/li>\n
    • Modular power systems with parallel operation<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The UC3846DWTR from Texas Instruments is a dual-output 500kHz current-mode PWM controller with differential current sense, programmable current limit, and shutdown function in SOIC-16 package. Key Specifications Topology Push-Pull, Half-Bridge, Full-Bridge, Forward, Flyback, Boost, Buck Control Method Current Mode PWM Number of Outputs 2 (totem-pole, 500mA peak) Switching Frequency Up to 500 kHz […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31,13],"tags":[],"chip_brand":[138],"class_list":["post-7570","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Dual-output current-mode PWM controller, 500kHz, SOIC-16","date_code":"","package_case":"SOIC-16 (10.3 x 7.5 x 2.35 mm)","in_stock":840,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/uc3846.pdf","price":"$2.063 @ 1ku","product_introduction":"The UC3846DWTR from Texas Instruments is a dual-output current-mode PWM controller in SOIC-16 package. The device provides all features needed for fixed-frequency current-mode control with minimum external component count. The differential current sense amplifier with wide common mode range enables flexible current sensing topologies. The 500mA peak totem-pole outputs directly drive power MOSFET gates. Key features include automatic feedforward compensation, programmable pulse-by-pulse current limiting, automatic symmetry correction for push-pull converters, and double-pulse suppression. The shutdown terminal can initiate either a complete shutdown with automatic restart or latch the supply off. The DWTR suffix denotes SOIC-16 package with tape and reel packaging.","working_principle":"The UC3846DWTR operates as a fixed-frequency current-mode PWM controller. (1) The oscillator generates a sawtooth waveform at the frequency set by external RT and CT components (up to 500kHz). For each oscillator cycle, the PWM latch is set by the oscillator and reset by the current sense comparator, creating a duty cycle proportional to the error voltage divided by the current sense signal. This current-mode control provides inherent pulse-by-pulse current limiting and improved line regulation compared to voltage-mode control. (2) The differential current sense amplifier measures the switch current through a sense resistor or current transformer. The amplifier has wide common mode range, allowing the sense resistor to be placed in various locations (source side, return path, or transformer secondary). The error amplifier compares a fraction of the output voltage to the 5.1V reference and generates the control voltage for the PWM comparator. (3) For push-pull and bridge topologies, the two outputs alternate with a guaranteed dead time to prevent cross-conduction. The 50% maximum duty cycle per output ensures transformer core reset in push-pull configurations. The automatic symmetry correction balances the volt-second product across the transformer primary, preventing core saturation even with asymmetrical loads.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>C\/S+<\/td>Current sense non-inverting input<\/td><\/tr>
      2<\/td>C\/S-<\/td>Current sense inverting input<\/td><\/tr>
      3<\/td>E\/A+<\/td>Error amplifier non-inverting input<\/td><\/tr>
      4<\/td>E\/A-<\/td>Error amplifier inverting input<\/td><\/tr>
      5<\/td>COMP<\/td>Error amplifier output \/ compensation<\/td><\/tr>
      6<\/td>VREF<\/td>5.1V reference output (+\/-1%)<\/td><\/tr>
      7<\/td>RT<\/td>Oscillator timing resistor<\/td><\/tr>
      8<\/td>CT<\/td>Oscillator timing capacitor<\/td><\/tr>
      9<\/td>SYNC<\/td>Oscillator synchronization input<\/td><\/tr>
      10<\/td>GND<\/td>Ground<\/td><\/tr>
      11<\/td>AOUT<\/td>Output A (totem-pole, 500mA)<\/td><\/tr>
      12<\/td>GND<\/td>Power ground<\/td><\/tr>
      13<\/td>VC<\/td>Output stage supply<\/td><\/tr>
      14<\/td>BOUT<\/td>Output B (totem-pole, 500mA)<\/td><\/tr>
      15<\/td>VIN<\/td>Input supply (8.2-40V)<\/td><\/tr>
      16<\/td>SHUTDOWN<\/td>Shutdown control (350mV threshold)<\/td><\/tr><\/table>","application_scenarios":"
      • Telecommunication power converters with push-pull current-mode control<\/li>
      • Industrial power supplies with dual-output PWM and symmetry correction<\/li>
      • Half-bridge and full-bridge DC-DC converters up to 500kHz<\/li>
      • Forward converter with pulse-by-pulse current limiting<\/li>
      • Modular power systems with parallel operation and current sharing<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        UC3847DWTR<\/td>TI<\/td>High outputs in OFF state (vs low)<\/td><\/tr>
        UC3825DWTR<\/td>TI<\/td>1MHz, higher speed PWM controller<\/td><\/tr>
        LM5030MM<\/td>TI<\/td>Push-pull, 1A gate, VSSOP-10<\/td><\/tr>
        UCC28950DW<\/td>TI<\/td>Phase-shift full-bridge, SOIC-20<\/td><\/tr>
        UC3825BDWTR<\/td>TI<\/td>1MHz, enhanced UC3825<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7570","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=7570"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7570\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=7570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=7570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=7570"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=7570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}