High Voltage Switching Regulator for Offline SMPS : NCP107

Semi conductors and Modules for power factor correction

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Presentation

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.

Technical features

Integrated 700 V MOSFET with RDS(ON) of 11 Ω (NCP1072, NCP1075), 4.7 Ω (NCP1076, NCP1077), 22 Ω (NCP1070, NCP1071) Current-mode fixed frequency operation (65/100/130 kHz) Peak current: NCP1072 = 250 mA, NCP1075 = 450 mA, NCP1076 = 650mA, NCP1077 = 800 mA, NCP1071 = 350mA, Peak Current: NCP1070 = 250mA Skip-cycle operation at low peak current: No Acoustic Noise! Dynamic self-supply (DSS) Auto-Recovery output short circuit protection with timer-based detection Frequency jittering (including during frequency foldback mode)

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