{"id":6552,"date":"2026-06-18T13:51:59","date_gmt":"2026-06-18T13:51:59","guid":{"rendered":"https:\/\/materialparts.com\/tda7294\/"},"modified":"2026-06-18T13:51:59","modified_gmt":"2026-06-18T13:51:59","slug":"tda7294","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/tda7294\/","title":{"rendered":"TDA7294"},"content":{"rendered":"

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

The TDA7294 from STMicroelectronics is a 100W DMOS audio amplifier IC in a Multiwatt15 package. It combines a DMOS power output stage with a bipolar input stage, providing high output power with low distortion. The device operates from +\/-10V to +\/-40V supply rails.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Output Power<\/td>\n100W (typ into 4 ohm, +\/-35V)<\/td>\n<\/tr>\n
\u7535\u6e90\u7535\u538b<\/td>\n+\/-10V to +\/-40V<\/td>\n<\/tr>\n
THD<\/td>\n0.1% (typ at 50W, 1kHz)<\/td>\n<\/tr>\n
Input Impedance<\/td>\n100kOhm<\/td>\n<\/tr>\n
Voltage Gain<\/td>\n30dB (typ)<\/td>\n<\/tr>\n
\u538b\u6446\u7387<\/td>\n10V\/us<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nMultiwatt15 (vertical)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n0 to +70 C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • DMOS power output stage for high power and low distortion<\/li>\n
  • 100W output into 4 ohm load<\/li>\n
  • Standby and mute functions<\/li>\n
  • Short-circuit protection<\/li>\n
  • Thermal shutdown<\/li>\n
  • Low noise and low distortion<\/li>\n
  • Split supply operation<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • High-power audio amplifiers<\/li>\n
    • Active speaker systems<\/li>\n
    • Home theater systems<\/li>\n
    • Professional audio equipment<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The TDA7294 from STMicroelectronics is a 100W DMOS audio amplifier IC in a Multiwatt15 package. It combines a DMOS power output stage with a bipolar input stage, providing high output power with low distortion. The device operates from +\/-10V to +\/-40V supply rails. Key Specifications Output Power 100W (typ into 4 ohm, +\/-35V) […]<\/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":[21,13],"tags":[],"chip_brand":[142],"class_list":["post-6552","post","type-post","status-publish","format-standard","hentry","category-audio-ics","category-integrated-circuits-ics","chip_brand-st"],"acf":{"brief_explanation":"100W DMOS audio amplifier IC, +\/-10-40V supply, low distortion, Multiwatt15","date_code":"","package_case":"Multiwatt15 (vertical)","in_stock":7453,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/tda7294.pdf","price":"$3.20 @ 500","product_introduction":"The TDA7294 is a 100W DMOS audio amplifier IC from STMicroelectronics that combines a bipolar input stage with a DMOS power output stage. This hybrid architecture provides the low noise and low distortion characteristics of bipolar input with the high power capability and thermal efficiency of DMOS outputs. The device can deliver up to 100W into a 4-ohm load from +\/-35V supply rails with typical THD of 0.1% at 50W. Built-in protection features include short-circuit protection, thermal shutdown, and clip detection. The standby and mute functions enable pop-free power on\/off sequencing.","working_principle":"The TDA7294 uses a hybrid DMOS\/bipolar architecture. The input stage uses bipolar transistors for low noise and high gain accuracy, while the output stage uses DMOS power transistors for high current handling and low saturation voltage. The voltage gain is internally set at approximately 30dB but can be adjusted with external resistors. The DMOS output stage operates in class AB mode for low crossover distortion. Protection circuits monitor output current, junction temperature, and output clipping. The mute function disconnects the input stage from the output stage, while standby reduces quiescent current to a minimum.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>ST-BY<\/td>Standby control (active high)<\/td><\/tr>
      2<\/td>-VS<\/td>Negative supply<\/td><\/tr>
      3<\/td>GND<\/td>Ground<\/td><\/tr>
      4<\/td>-VS<\/td>Negative supply<\/td><\/tr>
      5<\/td>OUT<\/td>Audio output<\/td><\/tr>
      6<\/td>+VS<\/td>Positive supply<\/td><\/tr>
      7<\/td>+VS<\/td>Positive supply<\/td><\/tr>
      8<\/td>MUTE<\/td>Mute control (active high)<\/td><\/tr>
      9<\/td>NFB<\/td>Negative feedback input<\/td><\/tr>
      10<\/td>IN<\/td>Audio input<\/td><\/tr>
      11-15<\/td>GND\/NC<\/td>Ground \/ Not connected<\/td><\/tr><\/table>","application_scenarios":"
      • Hi-Fi audio power amplifiers delivering 100W into 4 ohm speakers<\/li>
      • Home theater receivers needing high-power, low-distortion amplification<\/li>
      • Active studio monitors with DMOS output stage for thermal efficiency<\/li>
      • Professional audio equipment requiring mute\/standby and protection features<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Key Difference<\/th><\/tr>
        TDA7293<\/td>ST<\/td>Similar, higher voltage rating<\/td><\/tr>
        TDA7295<\/td>ST<\/td>80W version<\/td><\/tr>
        LM3886<\/td>TI<\/td>68W, different architecture<\/td><\/tr>
        TA2022<\/td>Tripath<\/td>Class-T, digital topology<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6552","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=6552"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/6552\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=6552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=6552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=6552"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=6552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}