{"id":5866,"date":"2026-06-11T06:00:54","date_gmt":"2026-06-11T06:00:54","guid":{"rendered":"https:\/\/materialparts.com\/lm5021mm-2-nopb\/"},"modified":"2026-06-12T02:44:38","modified_gmt":"2026-06-12T02:44:38","slug":"lm5021mm-2-nopb","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/lm5021mm-2-nopb\/","title":{"rendered":"LM5021MM-2\/NOPB"},"content":{"rendered":"

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The LM5021MM-2\/NOPB from TI is a 100V current-mode PWM controller with 1MHz switching, integrated high-voltage start-up, and slope compensation in VSSOP-10 for isolated power supplies.<\/p>\n

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\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nVSSOP-10 (3x3mm)<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • See datasheet for complete specifications<\/li>\n
  • Industry-standard package<\/li>\n<\/ul>\n

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      \n
    • Industrial control<\/li>\n
    • Consumer electronics<\/li>\n
    • Communication equipment<\/li>\n
    • Power management<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LM5021MM-2\/NOPB from TI is a 100V current-mode PWM controller with 1MHz switching, integrated high-voltage start-up, and slope compensation in VSSOP-10 for isolated power supplies. Key Specifications Package VSSOP-10 (3x3mm) Features See datasheet for complete specifications Industry-standard package Applications Industrial control Consumer electronics Communication equipment Power management<\/p>","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-5866","post","type-post","status-publish","format-standard","hentry","category-dc-dc-converters","category-integrated-circuits-ics","chip_brand-ti"],"acf":{"brief_explanation":"Current-mode PWM controller, 100V, 1MHz, VSSOP-10","date_code":"","package_case":"VSSOP-10 (3x3mm)","in_stock":4889,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/lm5021.pdf","price":"$1.50 @ 1ku","product_introduction":"The LM5021MM-2\/NOPB from TI is a 100V current-mode PWM controller with 1MHz switching, integrated high-voltage start-up, and slope compensation in VSSOP-10 for isolated power supplies.","working_principle":"The LM5021MM-2\/NOPB is a 100V current-mode PWM controller from TI in VSSOP-10, designed for isolated forward and flyback converters. The -2 version supports input voltages from 15V to 100V, suitable for telecom -48V and industrial 24V systems. The internal VCC regulator starts at 7.7V and can be self-biased from the transformer auxiliary winding after start-up, reducing IC power dissipation. The RT pin sets the switching frequency: fSW = 10kOhm \/ RSET x 1MHz (e.g., RSET = 20kOhm gives 500kHz). Current-mode control provides: 1) Cycle-by-cycle current limiting via the CS pin (0.5V threshold); 2) Inherent input voltage feed-forward for improved line regulation; 3) Slope compensation via an internal 50mV\/us ramp added to the current sense signal. The COMP pin accepts the error amplifier output from the optocoupler (isolated feedback) or direct feedback (non-isolated). The SS pin controls soft-start: the internal 10uA current source charges an external capacitor, ramping the PWM duty cycle from 0% to maximum over tSS = CSS x 0.5V \/ 10uA. The UVLO pin uses an external resistor divider to set the start\/stop voltage thresholds. The 2A peak gate drive directly drives external MOSFETs up to 50nC gate charge.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VCC<\/td>Power<\/td>Internal 7.7V regulator output (bypass with 0.1uF)<\/td><\/tr>
      2<\/td>COMP<\/td>Analog<\/td>Error amplifier output \/ PWM comparator input<\/td><\/tr>
      3<\/td>FB<\/td>Input<\/td>Feedback input (1.25V reference)<\/td><\/tr>
      4<\/td>CS<\/td>Input<\/td>Current sense input (0.5V threshold)<\/td><\/tr>
      5<\/td>SS<\/td>Analog<\/td>Soft-start capacitor (internal 10uA source)<\/td><\/tr>
      6<\/td>RT<\/td>Analog<\/td>Switching frequency set resistor<\/td><\/tr>
      7<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      8<\/td>OUT<\/td>Output<\/td>Gate drive output (2A peak)<\/td><\/tr>
      9<\/td>VIN<\/td>Power<\/td>Input supply (15-100V for -2 version)<\/td><\/tr>
      10<\/td>UVLO<\/td>Input<\/td>Under-voltage lockout set point (external divider)<\/td><\/tr><\/table>","application_scenarios":"
    • Industrial control<\/li>
    • Consumer electronics<\/li>
    • Communication equipment<\/li>
    • Power management<\/li>","alternative_models":"
      Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
      Texas Instruments<\/td>LM5021MM-1\/NOPB<\/td>VSSOP-10<\/td>Same device, 15-65V range<\/td><\/tr>
      Texas Instruments<\/td>LM5025MM\/NOPB<\/td>VSSOP-10<\/td>Active-clamp forward controller<\/td><\/tr>
      onsemi<\/td>NCP1252BSD1A2G<\/td>TSOP-6<\/td>Current-mode PWM controller, 65V<\/td><\/tr>
      Analog Devices<\/td>LT8316EMS#PBF<\/td>MSOP-16<\/td>Isolated flyback, no optocoupler<\/td><\/tr>
      Infineon<\/td>ICE3PCS01GXUMA1<\/td>PG-DSO-8<\/td>PFC controller, CCM, 250kHz<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5866","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=5866"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5866\/revisions"}],"predecessor-version":[{"id":6018,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/5866\/revisions\/6018"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=5866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=5866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=5866"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=5866"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}