{"id":2444,"date":"2026-05-20T04:47:50","date_gmt":"2026-05-20T04:47:50","guid":{"rendered":"https:\/\/materialparts.com\/stcs2aspr\/"},"modified":"2026-05-20T04:47:50","modified_gmt":"2026-05-20T04:47:50","slug":"stcs2aspr","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/stcs2aspr\/","title":{"rendered":"STCS2ASPR"},"content":{"rendered":"

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

The STCS2ASPR from STMicroelectronics is a BiCMOS constant current LED driver capable of delivering up to 2A output current with +-10% precision. It features PWM dimming, slope control for EMI reduction, LED disconnection diagnostic, and operates from 4.5V to 40V input, in a PowerSO-10 surface-mount package.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u5236\u9020\u5546<\/td>\n\u610f\u6cd5\u534a\u5bfc\u4f53<\/td>\n<\/tr>\n
\u8f93\u51fa\u7535\u6d41<\/td>\nUp to 2A<\/td>\n<\/tr>\n
\u8f93\u5165\u7535\u538b\u8303\u56f4<\/td>\n4.5V to 40V<\/td>\n<\/tr>\n
Feedback Voltage<\/td>\n100mV (90-110mV)<\/td>\n<\/tr>\n
Current Precision<\/td>\n+-10%<\/td>\n<\/tr>\n
Dropout Voltage<\/td>\n0.58V typ @ 2A<\/td>\n<\/tr>\n
\u9759\u6001\u7535\u6d41<\/td>\n450uA typ (on mode)<\/td>\n<\/tr>\n
\u5173\u673a\u7535\u6d41<\/td>\n1uA (5-12V)<\/td>\n<\/tr>\n
Dimming<\/td>\nPWM (up to 50kHz)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nPowerSO-10<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-40C to +125C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Up to 2A constant current output<\/li>\n
  • Wide input voltage: 4.5V to 40V<\/li>\n
  • Current set by external sensing resistor (100mV feedback)<\/li>\n
  • PWM dimming input (few Hz to 50kHz)<\/li>\n
  • Slope control with external capacitor for EMI reduction<\/li>\n
  • LED disconnection diagnostic output (open-drain)<\/li>\n
  • Shutdown pin for power conservation<\/li>\n
  • Less than 0.5V voltage overhead<\/li>\n
  • Internal thermal shutdown at 155C with 25C hysteresis<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Low-voltage LED lighting (5V, 12V, 24V)<\/li>\n
    • Automotive LED lighting and signage<\/li>\n
    • General illumination and display backlighting<\/li>\n
    • RGB LED driving<\/li>\n
    • Constant current source for industrial applications<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The STCS2ASPR from STMicroelectronics is a BiCMOS constant current LED driver capable of delivering up to 2A output current with +-10% precision. It features PWM dimming, slope control for EMI reduction, LED disconnection diagnostic, and operates from 4.5V to 40V input, in a PowerSO-10 surface-mount package. Key Specifications Manufacturer STMicroelectronics Output Current Up […]<\/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":[13,33],"tags":[],"chip_brand":[142],"class_list":["post-2444","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-led-driver-ics","chip_brand-st"],"acf":{"brief_explanation":"2A constant current LED driver, 4.5V-40V input, PWM dimming, slope control, diagnostic, PowerSO-10","date_code":"","package_case":"PowerSO-10 (7.6 x 9.5 x 3.65 mm)","in_stock":6780,"datasheet":"https:\/\/www.st.com\/en\/power-management\/stcs2a.html","price":"$1.46 @ 1ku","product_introduction":"The STMicroelectronics STCS2ASPR is a BiCMOS constant current source designed to provide precise constant current for driving LEDs from a varying input voltage source. It replaces discrete component solutions for driving LEDs in low-voltage applications such as 5V, 12V, or 24V systems, offering benefits in precision, integration, and reliability. The output current is set via an external sensing resistor connected to the FB pin, with a 100mV feedback voltage allowing low-value resistors to minimize power dissipation. A dedicated PWM input enables dimming control from a few Hz to 50kHz. An external capacitor on the SLOPE pin controls the current rise time, reducing EMI during switching transitions. The open-drain DISC pin provides diagnostic information on LED disconnection conditions.","working_principle":"The STCS2ASPR operates as a linear constant current regulator with four key subsystems: 1) Current Regulation Loop: The internal sense amplifier compares the voltage across the external feedback resistor (RFB) with the internal 100mV reference. The driver adjusts the main pass transistor to maintain 100mV across RFB, producing a constant LED current of ILED = 100mV \/ RFB. 2) PWM Dimming: When the PWM input is high, the main switch is on and current flows through the LEDs. When PWM is low, the switch turns off, enabling duty-cycle-based brightness control at frequencies up to 50kHz. 3) Slope Control: An external capacitor on the SLOPE pin controls the gate drive ramp rate, setting the current rise and fall times. This reduces EMI by limiting di\/dt during switching. 4) Protection and Diagnostic: The thermal shutdown disables the output at 155C. The DISC pin monitors the drain voltage and indicates a load disconnection when the drain-to-ground voltage drops below 75mV.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>VCC<\/td>Power<\/td>Supply voltage (4.5V to 40V)<\/td><\/tr>
      2<\/td>EN<\/td>Input<\/td>Enable input (active high, shutdown when low)<\/td><\/tr>
      3<\/td>PWM<\/td>Input<\/td>PWM dimming input<\/td><\/tr>
      4<\/td>FB<\/td>Input<\/td>Current feedback sense (100mV reference)<\/td><\/tr>
      5<\/td>SLOPE<\/td>Input<\/td>Slope control capacitor connection<\/td><\/tr>
      6<\/td>GND<\/td>Ground<\/td>Ground connection<\/td><\/tr>
      7<\/td>BYP<\/td>Power<\/td>Internal 3.3V bypass (100nF cap to GND)<\/td><\/tr>
      8<\/td>DISC<\/td>Output<\/td>Load disconnection diagnostic (open-drain)<\/td><\/tr>
      9<\/td>DRAIN<\/td>Output<\/td>Internal MOSFET drain (connect to LED cathode)<\/td><\/tr>
      10<\/td>SOURCE<\/td>Output<\/td>Internal MOSFET source (connect to FB resistor)<\/td><\/tr>
      Tab<\/td>GND<\/td>Ground<\/td>Thermal pad, connect to GND<\/td><\/tr><\/table>","application_scenarios":"
      • Low-voltage LED lighting systems powered from 5V, 12V, or 24V supplies<\/li>
      • Automotive interior and exterior LED lighting with PWM dimming<\/li>
      • Architectural and signage LED illumination<\/li>
      • RGB LED color mixing with independent current channels<\/li>
      • Industrial indicator and status LED arrays<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        ST<\/td>STCS2APH<\/td>PowerSO-10<\/td>Through-hole version<\/td><\/tr>
        ST<\/td>STCS1SPR<\/td>PowerSO-10<\/td>1.5A version, same family<\/td><\/tr>
        TI<\/td>TLD4062-2SV<\/td>PG-DSO-14<\/td>1.5A LED driver, similar<\/td><\/tr>
        onsemi<\/td>NSI45020AT1G<\/td>SOD-123<\/td>20mA constant current, simpler<\/td><\/tr>
        Infineon<\/td>BTS50055-1TAA<\/td>TO-252<\/td>High-side switch for LED<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2444","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=2444"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2444\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2444"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}