MP4027是MPS于2013年年中推出的两款原边反馈、单极PFC、带NTC功能的恒流控制器件，它与MP4026一同推出，功能基本相似，MP4027多了温度保护功能以及可以实现PWM调光。
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The MP4027 is a primary-side-control, offline LED controller that achieves high-power factorand accurate LED current for isolated, single-power-stage lighting applications in an FCTSOT package. The proprietary real-current-control method accurately controls LED current fromprimary-side information with good line and load regulation. The primary-side-control eliminatesthe secondary-side feedback components andthe opto-coupler to significantly simplify LED-lighting-system design.The MP4027 integrates power-factor correctionand works in boundary-conduction mode toreduce MOSFET switching losses.The MP4027 has NTC function and allowsPWM dimming.The MP4027’s multiple protection featuresgreatly enhance system reliability and safety.These features include over-voltage protection,short-circuitprotection,primary-sideover-current protection, brown out protection, cycle-by-cycle current limiting, VCC under-voltagelockout, and auto-restart over-temperatureprotection.
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•Real-Current Control without Secondary-Feedback Circuit
•<2% Line/Load Regulation
•Current Fold back for Over Temperature(NTC)
•PWM Dimming Available
•High Power Factor (≥0.9) over UniversalInput Voltage
•Boundary Conduction Mode for ImprovedEfficiency
•Brown-Out Protection
•Over-Voltage Protection
•Short-Circuit Protection
•Over-Temperature Protection
•Primary-Side Over-Current Protection
•Cycle-by-Cycle Current Limit
•Input UVLO
•Available in FCTSOT-8 Package
