{"product_id":"bl8033cb6tr-gn-buck-converter-iceriver-ks0-power-supply","title":"BL8033CB6TR GN - Buck Converter for Iceriver KS0 Power Supply","description":"\u003ch2\u003eBL8033CB6TR Synchronous Buck Converter | High-Efficiency 3A Step-Down for IceRiver KS0 PSU\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBL8033CB6TR (GN marking)\u003c\/strong\u003e is a high-efficiency \u003cstrong\u003e3A synchronous buck converter IC\u003c\/strong\u003e packaged in the \u003cstrong\u003eSOT23-6\u003c\/strong\u003e footprint — used on the \u003cstrong\u003eIceRiver KS0 power supply board\u003c\/strong\u003e as the auxiliary-rail step-down converter. The integrated synchronous rectifier topology eliminates the need for an external Schottky diode and pushes peak efficiency above 96%, which matters in a power-dense PSU where every watt of conversion loss translates directly into board temperature.\u003c\/p\u003e\n\u003cp\u003eBuilt around a fixed \u003cstrong\u003e500kHz switching frequency\u003c\/strong\u003e, the BL8033CB6TR accepts a \u003cstrong\u003e4.2V to 16V input range\u003c\/strong\u003e and delivers an adjustable output from \u003cstrong\u003e0.6V up to (Vin − 0.5V)\u003c\/strong\u003e at continuous \u003cstrong\u003e3A output current\u003c\/strong\u003e. The part includes the full set of protections needed for production mining hardware: overcurrent, overtemperature, short-circuit, and output undervoltage. Internal soft-start eliminates inrush current on power-up, protecting upstream caps and bus rails.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace the BL8033CB6TR on an IceRiver KS0 PSU\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePSU produces main rail but no auxiliary rail\u003c\/strong\u003e — control board doesn't boot, fans don't spin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuxiliary rail voltage drops under load\u003c\/strong\u003e — converter can't sustain 3A output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage\u003c\/strong\u003e on the SOT23-6 footprint — burnt or cracked package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching node waveform absent\u003c\/strong\u003e — measure with a 100MHz scope probe; should show clean 500kHz square wave at the SW pin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive ripple\u003c\/strong\u003e on the auxiliary rail (\u0026gt;50mV peak-to-peak) — internal compensation network failure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs and Technical Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3A continuous output current\u003c\/strong\u003e — covers IceRiver KS0 auxiliary rail load with headroom.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.2V to 16V input voltage range\u003c\/strong\u003e — fits both pre- and post-PFC bus topologies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.6V to (Vin − 0.5V) adjustable output\u003c\/strong\u003e — resistor-divider set, supports multiple rail voltages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500kHz fixed switching frequency\u003c\/strong\u003e — predictable EMI signature, simplified filter design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e96% peak efficiency\u003c\/strong\u003e — synchronous rectification eliminates external Schottky losses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSOT23-6 package\u003c\/strong\u003e — compact footprint matching the IceRiver KS0 PSU PCB layout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in protections\u003c\/strong\u003e — OCP, OTP, SCP, UVLO, soft-start.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBL8033CB6TR Buck Converter Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eSynchronous Buck Converter (Step-Down)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilk Marking\u003c\/td\u003e\n\u003ctd\u003eGN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSOT23-6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e4.2V to 16V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage Range\u003c\/td\u003e\n\u003ctd\u003e0.6V to (Vin − 0.5V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current\u003c\/td\u003e\n\u003ctd\u003e3A continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd\u003e500kHz fixed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Efficiency\u003c\/td\u003e\n\u003ctd\u003e96%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtections\u003c\/td\u003e\n\u003ctd\u003eOCP \/ OTP \/ SCP \/ UVLO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoft-Start\u003c\/td\u003e\n\u003ctd\u003eIntegrated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Equipment\u003c\/td\u003e\n\u003ctd\u003eIceRiver KS0 PSU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFAQ — BL8033CB6TR Synchronous Buck\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm the BL8033CB6TR is the failed part?\u003c\/strong\u003e\u003cbr\u003eA: (1) Check input voltage on the VIN pin — should match the bus rail; (2) Probe SW pin with a 100MHz scope — should show a clean 500kHz square wave switching between 0V and Vin; (3) Probe the output rail at the inductor — should show the regulated DC value; (4) If VIN is good but SW is dead, the IC is failed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I substitute another 3A SOT23-6 buck converter?\u003c\/strong\u003e\u003cbr\u003eA: Electrically possibly, but the pinout convention varies between SOT23-6 buck converter families. Always verify the pinout (EN \/ VIN \/ GND \/ FB \/ SW \/ BST or similar) matches the BL8033CB6TR datasheet exactly before substituting. The compensation network on the PCB is tuned to the original part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Rework profile for SOT23-6?\u003c\/strong\u003e\u003cbr\u003eA: Hot-air rework at 320°C, flux paste, controlled airflow. Lift with tweezers; place fresh part with pin-1 orientation matching the silk-mark on the PCB. Use 100°C bottom-side preheat to reduce thermal stress on the surrounding caps.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the inductor and output cap also need replacing?\u003c\/strong\u003e\u003cbr\u003eA: Usually no — the inductor and output cap are physically larger and tougher. But if the buck IC failed catastrophically (short on the SW pin), inspect the inductor for burning and the output cap for bulging; replace if damaged.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing for repair shops?\u003c\/strong\u003e\u003cbr\u003eA: Yes — email contact@lys-sz.com for tape-and-reel quantities.\u003c\/p\u003e\n\u003ch3\u003eRelated products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/25v-650uf-solid-capacitor-loveminer-hashboard-repair\"\u003e25V 650µF Solid Capacitor (Loveminer A1 Hashboard)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/2sc4672t100q-dk-npn-silicon-epitaxial-transistor-lovecore-loveminer-a1-psu-repair\"\u003e2SC4672T100Q NPN Transistor (Lovecore A1 PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/iceriver-ks0-mini-fan-spoofer-asic-bypass-fan-error-fix\"\u003eIceRiver KS0 Mini Fan Spoofer (ASIC Bypass)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/cm6800-pfc-pwm-combo-controller-power-supply-repair\"\u003eCM6800 PFC + PWM Combo Controller (Power Supply Repair)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIceRiver repair benches stocking BL8033CB6TR converters in volume? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for bulk pricing and matched PSU repair kits. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":42812002009267,"sku":null,"price":0.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/BL8033CB6TR-GN-Synchronous-Buck-Converter-Iceriver-KS0-Power-Supply-repair_3.webp?v=1745812392","url":"https:\/\/lys-sz.com\/products\/bl8033cb6tr-gn-buck-converter-iceriver-ks0-power-supply","provider":"LYS Shenzhen","version":"1.0","type":"link"}