{"product_id":"ncp1252adr2g-current-mode-pwm-controller","title":"NCP1252ADR2G Current Mode PWM Controller for Flyback Applications","description":"\u003ch2\u003eNCP1252ADR2G Current-Mode PWM Controller | Flyback \/ Forward IC for ASIC PSU \u0026amp; AC-DC Adapter Repair\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eNCP1252ADR2G\u003c\/strong\u003e is a high-performance \u003cstrong\u003ecurrent-mode PWM controller\u003c\/strong\u003e designed for \u003cstrong\u003eflyback and forward power supply applications\u003c\/strong\u003e. Targets ATX power supplies and AC-DC adapters that need reliable performance, flexible operation, and enhanced protection features. \u003cstrong\u003eAdjustable soft-start\u003c\/strong\u003e, \u003cstrong\u003erobust fault management\u003c\/strong\u003e, and a \u003cstrong\u003estable 65kHz switching frequency\u003c\/strong\u003e ensure smooth startup behaviour and protect the system against overload and fault conditions.\u003c\/p\u003e\n\u003cp\u003eCompact \u003cstrong\u003eSOIC-8 narrow package\u003c\/strong\u003e for space-constrained designs. \u003cstrong\u003e8.4V to 20V supply voltage range\u003c\/strong\u003e, \u003cstrong\u003e1mA supply current\u003c\/strong\u003e, \u003cstrong\u003eup to 75% duty cycle\u003c\/strong\u003e, full operating temp range −40°C to +125°C — handles the thermal envelope of bench-mounted mining PSU repair.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace the NCP1252ADR2G\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePSU stuck at startup\u003c\/strong\u003e — controller dead, no PWM output to the main switching stage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLatch-protection tripping repeatedly\u003c\/strong\u003e — controller sensing a phantom fault, replace if external fault sources ruled out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft-start ramp absent or distorted\u003c\/strong\u003e — controller degraded, can't deliver clean startup sequence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudible squealing at the switching frequency\u003c\/strong\u003e — controller frequency drift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible damage on the SOIC-8 package\u003c\/strong\u003e after a fault event.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNCP1252ADR2G 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\u003eNCP1252ADR2G\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCategory\u003c\/td\u003e\n\u003ctd\u003ePMIC — DC\/DC Switching Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTopology\u003c\/td\u003e\n\u003ctd\u003eFlyback \/ Forward\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd\u003e65kHz fixed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDuty Cycle (Max)\u003c\/td\u003e\n\u003ctd\u003e75%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e8.4V to 20V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Current\u003c\/td\u003e\n\u003ctd\u003e1mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoft-Start\u003c\/td\u003e\n\u003ctd\u003eAdjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOverload, latch, brownout recovery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature (TJ)\u003c\/td\u003e\n\u003ctd\u003e-40°C to +125°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePackage\u003c\/td\u003e\n\u003ctd\u003eSOIC-8 Narrow\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 — NCP1252ADR2G PWM Controller\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: NCP1252A vs NCP1252B — interchangeable?\u003c\/strong\u003e\u003cbr\u003eA: Different dash-suffix variants in the family have different protection-recovery behaviour. The \"A\" version uses latch-mode protection (manual reset on permanent fault). Match the suffix on the original IC to keep startup behaviour predictable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm the controller is the failed part?\u003c\/strong\u003e\u003cbr\u003eA: Scope the IC's output pin during start-up. Healthy controller produces a clean 65kHz PWM waveform with a visible soft-start ramp. Stuck high \/ low, missing pulses, or wrong frequency = chip failed. Verify VCC pin bias first.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Rework profile?\u003c\/strong\u003e\u003cbr\u003eA: Standard SOIC-8 rework. Preheat to 100°C, hot air at 320°C with flux paste. Verify all 8 pins solder cleanly under magnification before powering up.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Bulk pricing?\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\/ucc28c45dr-high-performance-pwm-controller-avalon-a1346-power-supply\"\u003eUCC28C45DR PWM Controller (Avalon A1346 PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/ncp1399am-ncp1399-current-mode-controller-avalon-psu-repair\"\u003eNCP1399AM Current Mode Controller (Avalon PSU)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/tea2095t-rectifier-controller-antminer-bitmain-apw11-psu\"\u003eTEA2095T Synchronous Rectifier Controller (APW11)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/pn8149wsc-a2-antminer-apw17-psu\"\u003ePN8149WSC-A2 Quasi-Resonant Flyback Controller (APW17)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eASIC PSU repair benches stocking NCP1252ADR2G in tape-and-reel volume? 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":42525658874035,"sku":null,"price":0.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/6710\/4179\/files\/NCP1252ADR2G-Original-Current-Mode-PWM.webp?v=1774238445","url":"https:\/\/lys-sz.com\/products\/ncp1252adr2g-current-mode-pwm-controller","provider":"LYS Shenzhen","version":"1.0","type":"link"}