{"id":9026,"date":"2026-07-02T03:09:19","date_gmt":"2026-07-02T03:09:19","guid":{"rendered":"https:\/\/materialparts.com\/sn6505bdbvt\/"},"modified":"2026-07-03T08:03:20","modified_gmt":"2026-07-03T08:03:20","slug":"sn6505bdbvt","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/sn6505bdbvt\/","title":{"rendered":"SN6505BDBVT"},"content":{"rendered":"

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

The SN6505BDBVT is a Texas Instruments low-noise 1A, 420kHz push-pull transformer driver for isolated power supplies with soft-start, spread spectrum clocking, slew-rate control, and enable. 2.25V-5.5V input in SOT-23-6 package. -55C to +125C.<\/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
\u062c\u0647\u062f \u0627\u0644\u0625\u062f\u062e\u0627\u0644<\/td>\n2.25 V to 5.5 V<\/td>\n<\/tr>\n
Output Drive<\/td>\n1 A (5V supply)<\/td>\n<\/tr>\n
\u062a\u0631\u062f\u062f \u0627\u0644\u062a\u062d\u0648\u064a\u0644<\/td>\n420 kHz (typ)<\/td>\n<\/tr>\n
RDS(\u062a\u0634\u063a\u064a\u0644)<\/td>\n0.25 Ohm max (4.5V)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u062f \u0627\u0644\u062d\u0627\u0644\u064a<\/td>\n1.7 A<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-23-6 (DBV)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Push-pull transformer driver with integrated 1A MOSFETs<\/li>\n
  • 420kHz precision internal oscillator<\/li>\n
  • Spread spectrum clocking for ultra-low EMI<\/li>\n
  • Slew-rate control for low noise<\/li>\n
  • Soft-start reduces inrush current<\/li>\n
  • External clock synchronization<\/li>\n
  • Enable with <1uA shutdown current<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Isolated RS-485\/CAN\/SPI power supplies<\/li>\n
    • Medical and industrial isolation<\/li>\n
    • Process control and telecom<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SN6505BDBVT is a Texas Instruments low-noise 1A, 420kHz push-pull transformer driver for isolated power supplies with soft-start, spread spectrum clocking, slew-rate control, and enable. 2.25V-5.5V input in SOT-23-6 package. -55C to +125C. Key Specifications Input Voltage 2.25 V to 5.5 V Output Drive 1 A (5V supply) Switching Frequency 420 kHz (typ) […]<\/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":[655],"chip_brand":[138],"class_list":["post-9026","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","tag-sn6505bdbvt","chip_brand-ti"],"acf":{"brief_explanation":"1A push-pull xformer driver, 420kHz, SOT-23-6, soft-start","date_code":"","package_case":"6-Pin SOT-23 (2.9 x 1.6 x 1.3 mm)","in_stock":5488,"datasheet":"https:\/\/www.ti.com\/lit\/ds\/symlink\/sn6505b.pdf","price":"$1.25 @ 1ku","product_introduction":"The SN6505BDBVT is a TI low-noise push-pull transformer driver for isolated power supplies. It drives center-tapped transformers from 2.25V to 5V DC. The 420kHz oscillator enables smaller transformers than the 160kHz SN6505A. Two integrated 1A N-channel MOSFETs with 0.25 Ohm RDS(on) drive the transformer primary. Ultra-low EMI is achieved through slew-rate control and spread spectrum clocking. Soft-start prevents high inrush currents. The CLK pin accepts external clock for synchronization. Internal protection includes 1.7A current limiting, UVLO, thermal shutdown, and break-before-make circuitry.","working_principle":"The internal 420kHz oscillator generates complementary gate drive signals for the two N-channel MOSFETs. During the first half-cycle, D1 is on and current flows through one half of the center-tapped primary. During the second half-cycle, D2 is on with opposite polarity. Break-before-make ensures no shoot-through. Slew-rate control limits dv\/dt to reduce EMI harmonics. Spread spectrum modulates oscillator frequency by +\/-10% to reduce peak emissions. Soft-start gradually increases duty cycle over 2ms.","pin_description":"
      Pin<\/th>Mnemonic<\/th>Description<\/th><\/tr>
      1<\/td>D1<\/td>Drain of first MOSFET<\/td><\/tr>
      2<\/td>VCC<\/td>Supply (2.25-5.5V)<\/td><\/tr>
      3<\/td>D2<\/td>Drain of second MOSFET<\/td><\/tr>
      4<\/td>GND<\/td>Ground<\/td><\/tr>
      5<\/td>EN<\/td>Enable (high=on)<\/td><\/tr>
      6<\/td>CLK<\/td>External clock input<\/td><\/tr><\/table>","application_scenarios":"
      • Isolated 5V to 5V\/200mA for RS-485 transceiver using 420kHz for small transformer<\/li>
      • 3.3V to isolated 5V\/100mA CAN bus power with SSC meeting CISPR 32<\/li>
      • Medical isolation barrier with soft-start preventing bus sag during hot-plug<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        SN6505ADBVT<\/td>TI<\/td>160kHz oscillator, lower EMI<\/td><\/tr>
        SN6501DBVR<\/td>TI<\/td>Simpler, 350kHz, no SSC<\/td><\/tr>
        MAX253ESA+T<\/td>ADI<\/td>1A, 300kHz, SOIC-8<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9026","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=9026"}],"version-history":[{"count":1,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9026\/revisions"}],"predecessor-version":[{"id":9036,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9026\/revisions\/9036"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9026"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9026"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9026"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9026"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}