NCP1076BBP100G

The NCP107xuz products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a two different pin−out of the very common PDIP−7 package, the NCP107xuz offers a high level of integration, including soft−start, frequency−jittering, short−circuit protection, skip−cycle, a maximum peak current set−point, ramp compensation, and a dynamic self−supply (DSS, eliminating the need for an auxiliary winding). Unlike other monolithic solutions, the NCP107xuz 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, Over−voltage Protection with auto−recovery. Ac input line voltage detection prevents lethal runaway in low input voltage conditions (Brown−out) as well as too high an input line (Ac line Over−voltage Protection). This also allows an Over−power Protection to compensate all internal delays in high input voltage conditions and optimize the maximum output current capability. 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.

Applications

• Auxiliary / Standby Isolated Power Supplies
• Major Home Appliances Power Supplies
• Power Meter SMPS
• Wide Input Industrial SMPS

Key features

• Built−in 700 V MOSFET with RDS(ON) of 13.5 Ω (NCP1075uz), 4.8 Ω (NCP1076uz/77uz) and 2.9 Ω (NCP1079uz)
• Large Creepage Distance Between High Voltage Pins
• Current−mode Fixed Frequency Operation – 65 / 100 / 130 kHz
• Fixed Slope Compensation
• Skip−cycle Operation at Low Peak Currents Only
• Dynamic Self−supply: No Need for an Auxiliary Winding
• Internal 10 ms Soft−start
• Auto−recovery Output Short−circuit Protection with Timer−based Detection
• Auto−recovery Over−voltage Protection with Auxiliary Winding Operation
• Adjustable Brown−out Protection and OVP
• 2nd Leading Edge Blanking – Current Protection (NCP107xuA version only)
• Over Power Protection
• Frequency Jittering for Better EMI Signature
• No Load Input Consumption <50 mW
• Frequency Foldback to Improve Efficiency at Light Load
• These are Pb−free Devices