{"product_id":"sct51240twbr-wide-supply-gate-driver-iceriver-psu-repair","title":"SCT51240TWBR Gate Driver for Power MOSFET Iceriver PSU Repair","description":"\u003ch2\u003eSCT51240TWBR 24V \/ 4A Wide-Supply Low-Side Gate Driver | High-Speed Replacement for Iceriver BP-H-3640 PSU Repair\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSCT51240TWBR\u003c\/strong\u003e is a \u003cstrong\u003e24V \/ 4A wide-supply low-side gate driver\u003c\/strong\u003e for power MOSFETs, IGBTs, and wide-bandgap GaN devices. Used on the \u003cstrong\u003eIceriver BP-H-3640 power supply\u003c\/strong\u003e to drive the primary-side switching MOSFETs at high frequencies — the kind of high-speed switching where propagation delay and drive-current capability directly limit converter efficiency.\u003c\/p\u003e\n\u003cp\u003eHeadline specs for PSU rework: \u003cstrong\u003e4.5V to 24V supply range\u003c\/strong\u003e, \u003cstrong\u003e4A peak source \/ sink\u003c\/strong\u003e, \u003cstrong\u003e12ns input-to-output propagation delay\u003c\/strong\u003e, \u003cstrong\u003e9ns rise \/ 6ns fall times\u003c\/strong\u003e, and \u003cstrong\u003enegative input voltage capability down to -5V\u003c\/strong\u003e for ringing-immunity at the driver input. Outputs default to a defined low when the input is floating, so the downstream MOSFET stays off through power-up sequencing — important on a PSU that just lost a primary MOSFET in a fault event.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace the SCT51240TWBR\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIceriver BP-H-3640 PSU dead\u003c\/strong\u003e after primary MOSFET failure — the driver usually goes with the MOSFET.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSluggish or asymmetric gate waveforms\u003c\/strong\u003e on the primary switch — driver rise \/ fall times have drifted out of spec.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePSU enters protection then resets repeatedly\u003c\/strong\u003e — UVLO triggering near the 4.5V threshold or thermal shutdown at 170°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage on the TSOT23-5L package\u003c\/strong\u003e — burnt or cracked after a primary-side fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjacent primary MOSFETs also failed\u003c\/strong\u003e — replace driver + MOSFETs together, never just one.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSCT51240TWBR Specifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eSCT51240TWBR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eLow-side gate driver (MOSFET \/ IGBT \/ GaN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage Range\u003c\/td\u003e\n\u003ctd\u003e4.5V to 24V (wide-supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Source Current\u003c\/td\u003e\n\u003ctd\u003e4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Sink Current\u003c\/td\u003e\n\u003ctd\u003e4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Configuration\u003c\/td\u003e\n\u003ctd\u003eDual (non-inverting or inverting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNegative Input Voltage\u003c\/td\u003e\n\u003ctd\u003eDown to -5V (ringing immunity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Logic Threshold\u003c\/td\u003e\n\u003ctd\u003eTTL-compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePropagation Delay\u003c\/td\u003e\n\u003ctd\u003e12ns (minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRise Time\u003c\/td\u003e\n\u003ctd\u003e9ns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFall Time\u003c\/td\u003e\n\u003ctd\u003e6ns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuiescent Current\u003c\/td\u003e\n\u003ctd\u003e38µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnder-Voltage Lockout\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloating-Input Output\u003c\/td\u003e\n\u003ctd\u003eLow level (safe default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermal Shutdown\u003c\/td\u003e\n\u003ctd\u003e170°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eTSOT23-5L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible PSU\u003c\/td\u003e\n\u003ctd\u003eIceriver BP-H-3640 power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCondition\u003c\/td\u003e\n\u003ctd\u003eBrand New\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eFAQ — SCT51240TWBR Gate Driver\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Replace just the driver, or driver + adjacent MOSFETs?\u003c\/strong\u003e\u003cbr\u003eA: Always check the MOSFETs the driver was switching. A shorted MOSFET takes the driver out with a Vgs spike in the same event — replacing only the driver and re-energising the PSU usually kills the new driver in seconds. Replace the MOSFET and the driver together, then re-power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the negative input voltage capability important?\u003c\/strong\u003e\u003cbr\u003eA: On a low-side driver in a buck topology, the source-side ground can momentarily swing negative during high-di\/dt switching events. A driver that latches up on negative input causes asymmetric switching and shoot-through. The -5V tolerance lets the SCT51240TWBR ride through these transients without misbehaving.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Rework profile for the TSOT23-5L?\u003c\/strong\u003e\u003cbr\u003eA: Bottom-side preheat 100°C, top-side hot air 300–320°C with flux paste. Small thermal mass — brief reflow dwell only, avoid prolonged heat which damages adjacent passives.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing for Iceriver PSU repair benches?\u003c\/strong\u003e\u003cbr\u003eA: Yes — email contact@lys-sz.com for reel-quantity SCT51240TWBR pricing and matched MOSFET kits.\u003c\/p\u003e\n\u003ch3\u003eRelated products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/iceriver-bp-h-3640w-psu-replacement-power-supply-ks3-ks3l-ks3m-asic-miner\"\u003eIceriver BP-H-3640W PSU Replacement (KS3 \/ KS3L \/ KS3M \/ KS5L)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/iceriver-ks3m-miner-original-replacement-control-board-cryptominer-repair\"\u003eIceriver KS-Series Control Board (KS1-KS5M)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/fan7391-fan7391mx-high-current-gate-driver-ic\"\u003eFAN7391MX High-Current Gate Driver IC\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/md18624gaa-high-frequency-gate-driver-avalon-1346-power-supply-repair\"\u003eMD18624GAA Dual Gate Driver (Avalon 1346 PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIceriver PSU repair benches stocking SCT51240TWBR gate drivers by the reel? Email \u003ca href=\"mailto:contact@lys-sz.com\"\u003econtact@lys-sz.com\u003c\/a\u003e for bulk pricing. Worldwide shipping from our Shenzhen warehouse.\u003c\/p\u003e","brand":"LYS Shenzhen","offers":[{"title":"Default Title","offer_id":42679476682931,"sku":null,"price":0.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/SCT51240TWBR-24V-4A-Wide-Supply-Gate-Driver-Low-Side-Driver-Power-MOSFET-Iceriver-PSU-Repair_2.webp?v=1745160285","url":"https:\/\/lys-sz.com\/products\/sct51240twbr-wide-supply-gate-driver-iceriver-psu-repair","provider":"LYS Shenzhen","version":"1.0","type":"link"}