{"id":3650,"date":"2026-06-07T13:03:18","date_gmt":"2026-06-07T13:03:18","guid":{"rendered":"https:\/\/materialparts.com\/stcs1pur\/"},"modified":"2026-06-07T13:03:18","modified_gmt":"2026-06-07T13:03:18","slug":"stcs1pur","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/stcs1pur\/","title":{"rendered":"STCS1PUR"},"content":{"rendered":"

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

The STCS1PUR from STMicroelectronics is a 1.5A BiCMOS constant current LED driver in a DFN-8 (3x3mm) package. With 4.5-40V input range, 100mV feedback reference voltage, PWM dimming input, and LED disconnection diagnostic, it provides a precise and integrated solution for driving high-brightness LEDs.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u62d3\u6251\u7ed3\u6784<\/td>\nLinear Constant Current Source<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b<\/td>\n4.5V to 40V<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\nUp to 1.5A<\/td>\n<\/tr>\n
Current Accuracy<\/td>\n+\/-10%<\/td>\n<\/tr>\n
Feedback Voltage<\/td>\n100 mV<\/td>\n<\/tr>\n
Voltage Overhead<\/td>\n<0.5V<\/td>\n<\/tr>\n
PWM Dimming Frequency<\/td>\nDC to 50 kHz<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n<1 uA<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n450 uA (typ)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40 to +150 C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nDFN-8 (3 x 3 x 0.88 mm)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 1.5A maximum output current<\/li>\n
  • 100mV feedback voltage for low power dissipation<\/li>\n
  • Current set by single external resistor<\/li>\n
  • PWM dimming input up to 50kHz<\/li>\n
  • Shutdown pin with <1uA current<\/li>\n
  • LED disconnection diagnostic output<\/li>\n
  • Less than 0.5V voltage overhead<\/li>\n
  • 4.5V to 40V input voltage range<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Low-voltage LED lighting (5V\/12V\/24V)<\/li>\n
    • Automotive interior and exterior lighting<\/li>\n
    • General LED illumination<\/li>\n
    • Display backlighting<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The STCS1PUR from STMicroelectronics is a 1.5A BiCMOS constant current LED driver in a DFN-8 (3x3mm) package. With 4.5-40V input range, 100mV feedback reference voltage, PWM dimming input, and LED disconnection diagnostic, it provides a precise and integrated solution for driving high-brightness LEDs. Key Specifications Topology Linear Constant Current Source Input Voltage 4.5V […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,20],"tags":[],"chip_brand":[142],"class_list":["post-3650","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-st"],"acf":{"brief_explanation":"1.5A constant current LED driver, 4.5-40V, PWM dimming, DFN-8 3x3mm","date_code":"","package_case":"DFN-8 (3.0 x 3.0 x 0.88 mm, exposed pad)","in_stock":4046,"datasheet":"https:\/\/www.st.com\/resource\/en\/datasheet\/stcs1.pdf","price":"$0.91 @ 1ku","product_introduction":"The STCS1PUR from STMicroelectronics is a BiCMOS constant current LED driver that replaces discrete component solutions for driving LEDs from low-voltage sources (5V, 12V, or 24V). The PUR suffix denotes the DFN-8 3x3mm package with tape and reel packaging. Current is set by a single external sense resistor (RF = 100mV \/ ILED) with +\/-10% accuracy. The 100mV feedback voltage minimizes power dissipation in the sense resistor. Features include PWM dimming up to 50kHz, shutdown with less than 1uA current, and an open-drain diagnostic output that detects LED string disconnection.","working_principle":"The STCS1 operates through four subsystems: (1) Current Regulation: An internal MOSFET pass element regulates LED current by comparing the voltage across the external sense resistor (connected to FB pin) against a precision 100mV internal reference. The resulting current is ILED = 100mV \/ RF with +\/-10% accuracy. (2) PWM Dimming: The PWM pin directly controls the main pass switch. When PWM is high, current flows to LEDs. When low, the switch opens. The 4us rise\/fall time supports dimming up to 50kHz. The internal bias remains active during PWM off-time for fast response. (3) Diagnostic: When enabled, the DISC pin monitors the DRAIN voltage. If below 75mV (indicating LED string open), DISC pulls low to alert the system. (4) Thermal Management: The DFN-8 exposed pad provides 38 C\/W RthJA, allowing up to 2W dissipation at 50C ambient.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>VCC<\/td>Power<\/td>Supply voltage (4.5-40V)<\/td><\/tr>
      2<\/td>DRAIN<\/td>Output<\/td>Internal MOSFET drain (connect to LED cathode)<\/td><\/tr>
      3<\/td>DISC<\/td>Output<\/td>Diagnostic output (open-drain, low = LED disconnected)<\/td><\/tr>
      4<\/td>FB<\/td>Input<\/td>Feedback \/ current sense (connect sense resistor to GND)<\/td><\/tr>
      5<\/td>GND<\/td>Power<\/td>Ground<\/td><\/tr>
      6<\/td>EN<\/td>Input<\/td>Enable (high = on, low = shutdown <1uA)<\/td><\/tr>
      7<\/td>PWM<\/td>Input<\/td>PWM dimming input (high = LED on)<\/td><\/tr>
      8<\/td>Pad<\/td>Thermal<\/td>Exposed thermal pad (connect to GND)<\/td><\/tr><\/table>","application_scenarios":"
      • 12V automotive LED lighting with 1.5A constant current and PWM dimming<\/li>
      • 24V industrial LED illumination with LED disconnect diagnostic feedback<\/li>
      • 5V USB-powered LED strips with 100mV low-dissipation current sensing<\/li>
      • RGB LED driver stages with 50kHz PWM dimming for color mixing<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>Iout<\/th>Vin<\/th>Notes<\/th><\/tr>
        STCS1PHR<\/td>ST<\/td>1.5A<\/td>4.5-40V<\/td>PowerSO-8 package<\/td><\/tr>
        AL8805WTTR<\/td>Diodes Inc<\/td>1A<\/td>6-30V<\/td>Buck LED driver<\/td><\/tr>
        PT4115E89E<\/td>Microchip<\/td>1.2A<\/td>8-30V<\/td>Buck LED driver<\/td><\/tr>
        TLC5940NT<\/td>TI<\/td>60mA\/ch<\/td>3-5.5V<\/td>16-ch PWM LED driver<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3650","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=3650"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/3650\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=3650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=3650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=3650"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=3650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}