{"id":8599,"date":"2026-06-29T06:56:24","date_gmt":"2026-06-29T06:56:24","guid":{"rendered":"https:\/\/materialparts.com\/sg3525ang\/"},"modified":"2026-06-29T06:56:24","modified_gmt":"2026-06-29T06:56:24","slug":"sg3525ang","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/sg3525ang\/","title":{"rendered":"SG3525ANG"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The onsemi SG3525ANG is a pulse width modulator (PWM) control circuit designed for switching power supply applications. Housed in a PDIP-16 package, it features a built-in soft-start circuit, under-voltage lockout, adjustable dead-time control, and dual totem-pole output stages capable of sourcing and sinking over 200 mA, making it suitable for push-pull, half-bridge, and full-bridge converter topologies.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n
\u7535\u6e90\u7535\u538b<\/td>\n8 V to 35 V<\/td>\n<\/tr>\n
Reference Voltage<\/td>\n5.1 V \u00b11%<\/td>\n<\/tr>\n
Oscillator Frequency<\/td>\n100 Hz to 400 kHz<\/td>\n<\/tr>\n
Output Peak Current<\/td>\n400 mA (source\/sink)<\/td>\n<\/tr>\n
Max Duty Cycle<\/td>\n49%<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nPDIP-16<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 5.1 V \u00b11% trimmed voltage reference<\/li>\n
  • Oscillator frequency range: 100 Hz to 400 kHz<\/li>\n
  • Separate oscillator sync pin for master-slave operation<\/li>\n
  • Adjustable dead-time control<\/li>\n
  • Built-in soft-start with external capacitor<\/li>\n
  • Pulse-by-pulse current limiting via shutdown pin<\/li>\n
  • Dual totem-pole output stages (400 mA peak)<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Switch-mode power supplies (SMPS)<\/li>\n
    • DC-DC converters (push-pull, half\/full-bridge)<\/li>\n
    • Battery chargers and inverters<\/li>\n
    • Motor drive control circuits<\/li>\n
    • Uninterruptible power supplies (UPS)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The onsemi SG3525ANG is a pulse width modulator (PWM) control circuit designed for switching power supply applications. Housed in a PDIP-16 package, it features a built-in soft-start circuit, under-voltage lockout, adjustable dead-time control, and dual totem-pole output stages capable of sourcing and sinking over 200 mA, making it suitable for push-pull, half-bridge, and […]<\/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":[144],"class_list":["post-8599","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-power-management-ics-pmic","chip_brand-on"],"acf":{"brief_explanation":"PWM controller IC, 8-35V, 100Hz-400kHz oscillator, dual 400mA totem-pole outputs, PDIP-16","date_code":"","package_case":"PDIP-16 (300 mil)","in_stock":9847,"datasheet":"https:\/\/www.onsemi.com\/pdf\/datasheet\/sg3525a-d.pdf","price":"$0.58 @ 1ku","product_introduction":"The SG3525ANG from onsemi is a versatile pulse width modulator control circuit optimized for all types of switching power supplies. It integrates a precision 5.1 V voltage reference, an oscillator with sync capability, an error amplifier, a PWM comparator with latch, soft-start circuitry, and dual totem-pole output drivers. The device operates from 8 V to 35 V and supports switching frequencies from 100 Hz to 400 kHz. The shutdown pin provides both pulse-by-pulse current limiting and full shutdown with soft-start recycling, offering comprehensive protection features in a single IC.","working_principle":"The SG3525ANG operates as a voltage-mode PWM controller. An internal oscillator generates a sawtooth waveform determined by external RT and CT components. The error amplifier compares a sample of the output voltage with the 5.1 V reference and produces a control voltage. The PWM comparator compares this control voltage against the oscillator ramp to set the pulse width. A flip-flop alternately enables the two output stages at half the oscillator frequency, producing complementary drive signals for push-pull operation. The shutdown pin (pin 10) immediately sets the PWM latch for fastest turn-off, while simultaneously discharging the soft-start capacitor. A sustained shutdown command fully discharges the soft-start capacitor, enabling a graceful restart upon release.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>INV INPUT<\/td>Analog Input<\/td>Error amplifier inverting input<\/td><\/tr>\n
      2<\/td>NON-INV INPUT<\/td>Analog Input<\/td>Error amplifier non-inverting input<\/td><\/tr>\n
      3<\/td>SYNC<\/td>Digital I\/O<\/td>Oscillator synchronization<\/td><\/tr>\n
      4<\/td>OSC OUTPUT<\/td>Analog Output<\/td>Oscillator output<\/td><\/tr>\n
      5<\/td>CT<\/td>Analog<\/td>Timing capacitor connection<\/td><\/tr>\n
      6<\/td>RT<\/td>Analog<\/td>Timing resistor connection<\/td><\/tr>\n
      7<\/td>DISCHARGE<\/td>Analog<\/td>CT discharge (dead-time adjust)<\/td><\/tr>\n
      8<\/td>SOFT-START<\/td>Analog<\/td>Soft-start capacitor connection<\/td><\/tr>\n
      9<\/td>COMPENSATION<\/td>Analog<\/td>Error amplifier output \/ compensation<\/td><\/tr>\n
      10<\/td>SHUTDOWN<\/td>Digital Input<\/td>Shutdown control (active high)<\/td><\/tr>\n
      11<\/td>OUTPUT A<\/td>Power Output<\/td>Output driver A<\/td><\/tr>\n
      12<\/td>GROUND<\/td>Power<\/td>Signal ground<\/td><\/tr>\n
      13<\/td>VC<\/td>Power<\/td>Output stage supply<\/td><\/tr>\n
      14<\/td>OUTPUT B<\/td>Power Output<\/td>Output driver B<\/td><\/tr>\n
      15<\/td>VCC<\/td>Power<\/td>Chip supply voltage<\/td><\/tr>\n
      16<\/td>VREF<\/td>Analog Output<\/td>5.1V reference output<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • Push-pull and half-bridge DC-DC converters<\/li>\n
      • Offline switching power supplies<\/li>\n
      • Solar inverter control circuits<\/li>\n
      • Battery charger PWM regulation<\/li>\n
      • Induction heater power control<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        TI<\/td>UC3525AN<\/td>PDIP-16<\/td>Pin-compatible equivalent<\/td><\/tr>\n
        onsemi<\/td>SG3525ADW<\/td>SOIC-16<\/td>Same function, SMD package<\/td><\/tr>\n
        TI<\/td>UC3825<\/td>PDIP-16<\/td>Current-mode alternative<\/td><\/tr>\n
        onsemi<\/td>MC34025P<\/td>PDIP-16<\/td>Current-mode, similar application<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8599","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=8599"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/8599\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=8599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=8599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=8599"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=8599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}