{"product_id":"dc-dc-step-down-constant-current-voltage-converter-module-300w-12a","title":"DC-DC Step-Down CC\/CV Converter Module 300W 12A | 7–32V In","description":"\u003ch2\u003eDC-DC Step-Down Constant Current \u0026amp; Constant Voltage Module – Up to 300W \/ 12A\u003c\/h2\u003e\n\u003cp\u003eThis high-performance non-isolated step-down CC\/CV (Constant Current \/ Constant Voltage) converter module is engineered for demanding DIY electronics, battery charging systems, and LED driver applications. Built with a dedicated IC and high-precision current-sensing resistor, it delivers exceptionally stable output with minimal temperature drift — making it a reliable choice for hobbyists and engineers alike.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Input Range:\u003c\/strong\u003e DC 7–32V input; DC 0.8–28V continuously adjustable output\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Output Current:\u003c\/strong\u003e Rated 9A continuous, up to 12A peak (add cooling fan if power tube exceeds 65°C)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Constant Current:\u003c\/strong\u003e 0.2–12A fully adjustable via onboard potentiometer\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eUp to 300W Maximum Output Power\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConversion Efficiency:\u003c\/strong\u003e Up to ~95%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Frequency:\u003c\/strong\u003e 300 kHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Output Ripple:\u003c\/strong\u003e ~50mV at 24V in \/ 12V out \/ 5A (20MHz bandwidth, excluding noise)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial-Grade Operating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Current Stability:\u003c\/strong\u003e Temperature drift \u0026lt;1% over 20°C–100°C range\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTurn-Lamp (Indicator) Current:\u003c\/strong\u003e Automatically set to 10% of constant current value (e.g. CC = 3A → indicator threshold = 0.3A)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Color LED Indicator:\u003c\/strong\u003e Red = charging in progress; Green = fully charged \/ no load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFour High-Frequency Filter Capacitors:\u003c\/strong\u003e Reduce output ripple and enhance stability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort-Circuit Protection:\u003c\/strong\u003e Yes (constant current limiting)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWiring:\u003c\/strong\u003e Screw terminal connections for easy hookup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLoad Regulation:\u003c\/strong\u003e ±1% | \u003cstrong\u003eVoltage Regulation:\u003c\/strong\u003e ±1%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo-Load Current:\u003c\/strong\u003e ~20mA (typical, at 24V→12V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDynamic Response Speed:\u003c\/strong\u003e 5% \/ 200µS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLowest Dropout:\u003c\/strong\u003e 1V\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePotentiometer Adjustment\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCV Potentiometer\u003c\/strong\u003e (near input terminals): Clockwise = increase voltage; Counter-clockwise = decrease voltage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCC Potentiometer\u003c\/strong\u003e (near output terminals): Clockwise = increase current; Counter-clockwise = decrease current\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications at a Glance\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModule Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNon-Isolated Step-Down CC\/CV\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 7–32V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 0.8–28V (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9A rated \/ 12A max\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Output Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~300W\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to ~95%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShort-Circuit Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes (CC mode)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReverse Polarity Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Backflow Prevention\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × DC-DC Step-Down CC\/CV Converter Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor more guidance on safe electronics and electrical component practices, visit the U.S. Consumer Product Safety Commission (CPSC) and explore electrical safety standards at \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Monitor color calibration and lighting conditions may cause slight variation from actual product appearance. Allow for minor manual measurement deviations in the listed specifications.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is this DC-DC step-down CC\/CV module used for?\u003c\/h4\u003e\n\u003cp\u003eA: This constant current \/ constant voltage step-down converter module is ideal for battery charging, LED driver circuits, and general power regulation projects where you need a stable, adjustable DC output lower than your input voltage. Its wide adjustable range (0.8–28V output, 0.2–12A current) makes it versatile for many DIY and professional electronics applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need a cooling fan with this module?\u003c\/h4\u003e\n\u003cp\u003eA: For lighter loads, no fan is required. However, if the power transistor (MOSFET) temperature exceeds 65°C — which may happen at higher current draws (close to 12A) — it is strongly recommended to attach a heatsink and\/or add an active cooling fan to maintain stable performance and extend component lifespan.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I adjust the output voltage and current?\u003c\/h4\u003e\n\u003cp\u003eA: Use the two onboard potentiometers. The CV (voltage) potentiometer, located near the input terminals, controls output voltage — turn clockwise to increase, counter-clockwise to decrease. The CC (current) potentiometer, near the output terminals, controls the constant current limit — clockwise increases current, counter-clockwise decreases it.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this module have reverse polarity protection?\u003c\/h4\u003e\n\u003cp\u003eA: No. This module does not include input reverse polarity protection or output backflow prevention. Always double-check your wiring polarity before connecting power to avoid damage to the module or connected devices.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is this DC-DC step-down CC\/CV module used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This constant current \/ constant voltage step-down converter module is ideal for battery charging, LED driver circuits, and general power regulation projects where you need a stable, adjustable DC output lower than your input voltage. Its wide adjustable range (0.8–28V output, 0.2–12A current) makes it versatile for many DIY and professional electronics applications.\"}}, {\"@type\": \"Question\", \"name\": \"Do I need a cooling fan with this module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"For lighter loads, no fan is required. 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Always double-check your wiring polarity before connecting power to avoid damage to the module or connected devices.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"DC-DC Step-Down CC\/CV Converter Module 300W 12A | 7–32V In\", \"item\": \"https:\/\/oasis-select.com\/products\/dc-dc-step-down-constant-current-voltage-converter-module-300w-12a\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"China Mainland","offer_id":47747048407145,"sku":"200007763:201336100","price":15.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S314eaaba5703455590c93ec18149edaag.webp?v=1783061643","url":"https:\/\/oasis-select.com\/products\/dc-dc-step-down-constant-current-voltage-converter-module-300w-12a","provider":"Oasis Select","version":"1.0","type":"link"}