NCP1342AMAACD1R2G ON Semiconductor

DATA SHEET www.onsemi.com Quasi-Resonant Flyback 9 8 1 1 Controller, High Frequency SOIC9 NB SOIC8 NB D SUFFIX D SUFFIX NCP1342 CASE 751BP CASE 751 The NCP1342 is a highly integrated quasi resonant flyback controller suitable for designing highperformance offline power MARKING DIAGRAMS converters. With an integrated active X2 capacitor discharge feature, 8 9 the NCP1342 can enable noload power consumption below 30 mW. The NCP1342 features a proprietary valleylockout circuitry, 1342abcde 1342abcde th ALYWf ALYWf ensuring stable valley switching. This system works down to the 6 valley and transitions to frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1342 enters quietskip 1 1 mode to manage the power delivery while minimizing acoustic noise. To ensure light load performance with high frequency designs, the 1342abcde = Specific Device Code NCP1342 incorporates Rapid Frequency Foldback with Minimum A = Assembly Location L = Wafer Lot Peak Current Modulation to reduce the switching frequency quickly. Y = Year To help ensure converter ruggedness, the NCP1342 implements W = Work Week several key protective features such as internal brownout detection, a f = Additional Options Code nondissipative Over Power Protection (OPP) for constant maximum = PbFree Package output power regardless of input voltage, a latched overvoltage and NTCready overtemperature protection through a dedicated pin, and PIN CONNECTIONS line removal detection to safely discharge the X2 capacitors when the 1 ac line is removed. HV Fault FMAX Features VCC FB Integrated HighVoltage Startup Circuit with Brownout Detection ZCD/OPP DRV Integrated X2 Capacitor Discharge Capability CS GND Wide V Range from 9 V to 28 V CC 1 28 V V Overvoltage Protection Fault HV CC VCC Abnormal Overcurrent Fault Protection for Winding Short Circuit or FB Saturation Detection ZCD/OPP DRV Internal Temperature Shutdown GND CS Valley Switching Operation with ValleyLockout for NoiseFree (Top Views) Operation Frequency Foldback with 25 kHz Minimum Frequency Clamp for ORDERING INFORMATION See detailed ordering and shipping information on page 3 of Increased Efficiency at Light Loads this data sheet. Rapid Frequency Foldback for Fast Reduction of Switching Frequency at Light Loads Skip Mode with QuietSkip Technology for Highest Performance During Light Loads Minimized Current Consumption for No Load Power Below 30 mW Frequency Jittering for Reduced EMI Signature Latching or AutoRecovery TimerBased Overload Protection Adjustable Overpower Protection (OPP) Adjustable Maximum Frequency Clamp Fault Pin for Severe Fault Conditions, NTC Compatible for OTP 4 ms SoftStart Timer Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: November, 2021 Rev. 22 NCP1342/DNCP1342 TYPICAL APPLICATION SCHEMATIC Vout ++ NCP1342 Fault HV + VCC FB L EMI ZCD/OPP DRV Filter CS GND N + t Figure 1. NCP1342 8 Pin Typical Application Circuit Vout ++ NCP1342 Fault HV FMAX + FB VCC L EMI ZCD/OPP DRV Filter CS GND N + t Figure 2. NCP1342 9Pin Typical Application Circuit www.onsemi.com 2