{"id":7030,"date":"2026-06-23T02:14:02","date_gmt":"2026-06-23T02:14:02","guid":{"rendered":"https:\/\/materialparts.com\/ucc28910dr\/"},"modified":"2026-06-23T02:14:02","modified_gmt":"2026-06-23T02:14:02","slug":"ucc28910dr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/ucc28910dr\/","title":{"rendered":"UCC28910DR"},"content":{"rendered":"

Productos<\/h2>\n

The UCC28910DR from Texas Instruments is a primary-side regulated (PSR) flyback controller with integrated 700V\/2A MOSFET in an SOIC-7 package. It eliminates the need for an optocoupler by sensing output voltage and current from the primary side, achieving +\/-1% constant voltage and +\/-5% constant current regulation.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Topology<\/td>\nFlyback (PSR)<\/td>\n<\/tr>\n
Internal MOSFET<\/td>\n700V, 2A<\/td>\n<\/tr>\n
Control Mode<\/td>\nPrimary-Side Regulation (no optocoupler)<\/td>\n<\/tr>\n
CV Accuracy<\/td>\n+\/-1%<\/td>\n<\/tr>\n
CC Accuracy<\/td>\n+\/-5%<\/td>\n<\/tr>\n
Input Voltage Range<\/td>\nUp to 700V DC<\/td>\n<\/tr>\n
Switching Frequency<\/td>\n60kHz ~ 100kHz (Valley Switching)<\/td>\n<\/tr>\n
Startup Current<\/td>\n25uA (Typical)<\/td>\n<\/tr>\n
Operating Current<\/td>\n2mA (Typical)<\/td>\n<\/tr>\n
Protection<\/td>\nOVP, OCP, OTP, Output Short<\/td>\n<\/tr>\n
Paquete<\/td>\nSOIC-7 (4.90 x 6.00mm)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-40\u00b0C ~ +125\u00b0C<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • Integrated 700V MOSFET reduces component count and solution size<\/li>\n
  • Primary-side regulation eliminates optocoupler for higher reliability<\/li>\n
  • Valley switching for reduced EMI and switching losses<\/li>\n
  • +\/-1% CV accuracy suitable for USB charger specifications<\/td>\n<\/ul>\n
  • +\/-5% CC accuracy for battery charging applications<\/li>\n
  • Comprehensive protection: OVP, OCP, OTP, output short circuit<\/li>\n
  • 25uA ultra-low startup current minimizes standby power<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • USB chargers and power adapters (5V\/2A)<\/li>\n
    • Offline flyback converters up to 10W<\/li>\n
    • LED lighting isolated drivers<\/li>\n
    • Home appliance standby supplies<\/li>\n
    • IoT device power supplies<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The UCC28910DR from Texas Instruments is a primary-side regulated (PSR) flyback controller with integrated 700V\/2A MOSFET in an SOIC-7 package. It eliminates the need for an optocoupler by sensing output voltage and current from the primary side, achieving +\/-1% constant voltage and +\/-5% constant current regulation. Key Specifications Topology Flyback (PSR) Internal MOSFET […]<\/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":[13,29],"tags":[],"chip_brand":[138],"class_list":["post-7030","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-ti"],"acf":{"brief_explanation":"PSR flyback controller with 700V\/2A integrated MOSFET, +\/-1% CV, +\/-5% CC, valley switching, no optocoupler in SOIC-7","date_code":"","package_case":"SOIC-7 (4.90 x 6.00 x 1.75 mm)","in_stock":12404,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/ucc28910.pdf","price":"$1.95 @ 1ku","product_introduction":"The UCC28910DR from Texas Instruments is a highly integrated offline flyback controller designed for isolated power supply applications up to 10W. It integrates a 700V power MOSFET and uses primary-side regulation (PSR) to eliminate the need for an optocoupler and secondary-side feedback circuitry. The device achieves constant voltage (CV) regulation accuracy of +\/-1% and constant current (CC) accuracy of +\/-5% by sampling the auxiliary winding voltage during the flyback period. Valley switching reduces EMI and switching losses by turning on the MOSFET near the voltage minimum. The 25uA startup current minimizes standby power consumption. Comprehensive protection features include output over-voltage, over-current, over-temperature, and output short-circuit protection. The SOIC-7 package provides a compact solution for space-constrained adapter and charger designs.","working_principle":"The UCC28910 employs primary-side regulation by sensing the output voltage through the auxiliary winding during the MOSFET off-time. When the internal MOSFET turns off, the secondary winding voltage is reflected to the auxiliary winding as VAUX = VOUT x (NAUX\/NS). The device samples this voltage at the knee point (when the secondary current reaches zero) to determine the output voltage accurately. For constant current regulation, the device monitors the primary-side peak current and the secondary conduction time to calculate the average output current. Valley switching is achieved by monitoring the drain voltage ringing and turning on the MOSFET at the voltage minimum. The internal controller uses a variable frequency and on-time architecture that naturally transitions between discontinuous conduction mode (DCM) at heavy load and reduced frequency at light load for efficiency.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>VDD<\/td>Internal supply and bypass capacitor<\/td><\/tr>
      2<\/td>FB<\/td>Feedback from auxiliary winding<\/td><\/tr>
      3<\/td>CS<\/td>Current sense input for OCP and CC regulation<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>DRAIN<\/td>Internal 700V MOSFET drain<\/td><\/tr>
      6<\/td>DRAIN<\/td>Internal 700V MOSFET drain<\/td><\/tr>
      7<\/td>VDD<\/td>Internal supply (tied to pin 1)<\/td><\/tr><\/table>","application_scenarios":"
      • 5V\/2A USB Charger<\/b>: PSR achieves +\/-1% output accuracy without optocoupler; integrated MOSFET minimizes component count for compact charger design<\/li>
      • LED Isolated Driver<\/b>: CC regulation provides constant current for LED strings; valley switching reduces EMI for lighting compliance<\/li>
      • Smart Home Appliance Power<\/b>: 25uA startup current enables sub-100mW standby power for always-plugged IoT devices<\/li>
      • Set-Top Box Auxiliary Supply<\/b>: 700V MOSFET handles universal 85-265VAC input; comprehensive protection ensures reliable operation<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        UCC28911DR<\/td>TI<\/td>Same, different CV\/CC setpoints<\/td><\/tr>
        UCC28700DR<\/td>TI<\/td>PSR flyback controller, external MOSFET, DIP-7<\/td><\/tr>
        TOP254PN<\/td>Power Integrations<\/td>700V MOSFET, 25W, DIP-8<\/td><\/tr>
        VIPer12ADIP-E<\/td>ST<\/td>600V MOSFET, 12W, DIP-8<\/td><\/tr>
        FSL336HR<\/td>onsemi<\/td>650V MOSFET, 20W, DIP-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7030","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=7030"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/7030\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=7030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=7030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=7030"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=7030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}