NCP1342ADDCDAD1R2G

NCP1342 is a high frequency, highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line power converters. With an integrated active X2 capacitor discharge feature, this can enable no−load power consumption below 30mW. This features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to frequency foldback mode to reduce switching losses. As the load decreases further, this enters quiet−skip mode to manage the power delivery while minimizing acoustic noise. To ensure light load performance with high frequency designs, this incorporates rapid frequency foldback with minimum peak current modulation to reduce the switching frequency quickly.

• Integrated high−voltage start-up circuit with brownout detection, 4ms soft−start timer
• Integrated X2 capacitor discharge capability, internal temperature shutdown
• 28V VCC overvoltage protection, fault pin for severe fault conditions, NTC compatible for OTP
• Abnormal overcurrent fault protection for winding short circuit or saturation detection
• Valley switching operation with valley−lockout for noise−free operation, SOIC−9 NB package
• Frequency foldback with 25KHz minimum frequency clamp for increased efficiency at light loads
• Rapid frequency foldback for fast reduction of switching frequency at light loads
• Skip mode with quiet−skip technology for highest performance during light loads
• Frequency jittering for reduced EMI signature
• Adjustable overpower protection (OPP), adjustable maximum frequency clamp