NCP1071: High-Voltage Switcher for Low Power Offline SMPS
●Unlike other monolithic solutions, the NCP1071 is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65,100 or 130 kHz). When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency at light loads. When the power demand reduces further, it enters into a skip mode to
reduce the standby consumption down to a no load condition.
●Protection features include: a timer to detect an overload or a short-circuit event, Overvoltage Protection with auto-recovery and AC input line voltage detection.
●For improved standby performance, the connection of an auxiliary winding stops the DSS operation and helps to reduce input power consumption below 50 mW at high line.
■Features:
●Integrated 700 V MOSFET with RDS(on) of 22Ω
●Current-Mode Fixed Frequency Operation (65/100/130 kHz)
●Peak Current: NCP1071 = 350mA
●Skip-Cycle Operation at Low Peak Current
●Dynamic Self-Supply (DSS)
●Auto-Recovery Output Short Circuit Protection with Timer- Based Detection
●Frequency Foldback Operation
●300μA No Load Power Consumption
●Frequency Jittering (including during frequency foldback mode)
●AC Input Voltage Line Detection:
For more features, see the data sheet
■Benefits:
●Up to 20W output SMPS design capability
●Ability to scale for efficiency or size
●Adjust output current protection based on output power demand
●Eliminate acoustic noise
●Eliminate Aux winding
●Provides more robust protection without worrying about the coupling of the aux winding
●Improved efficiency at light load / Improved EMI over the entire load
●<50mW no Load Power Consumption
●Better EMI Signature Over the Entire Operating Range
●Enhanced Protection Against Faults With Low Input Voltage
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NCP1071P065G 、 NCP1071P100G 、 NCP1071P130G 、 NCP1071STAT3G 、 NCP1071STBT3G 、 NCP1071STCT3G 、 NCP1071 |
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[ Auxiliary ][ Standby Isolated Power Supplies ][ White Goods ][ Smart Meter ][ E-Meter ] |
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Datasheet |
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Please see the document for details |
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PDIP-7;SOT-223-4;TO-261-4D |
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English Chinese Chinese and English Japanese |
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5/20/2021 |
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157 KB |
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