NCP1380 Series

Controller, Quasi-Resonant Current Mode

Catalog

Controller, Quasi-Resonant Current Mode

Part	Topology	Supplier Device Package	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Mounting Type	Internal Switch(s)	Package / Case	Package / Case [y]	Package / Case [x]	Operating Temperature [Max]	Operating Temperature [Min]	Output Isolation	Fault Protection	Voltage - Start Up	Voltage - Input [Min]	Voltage - Input [Max]	Regulator Topology	Supplied Contents	Main Purpose	Board Type	Current - Output	Outputs and Type	Outputs and Type	Utilized IC / Part	Voltage - Output
ON Semiconductor NCP1380CDR2G	Flyback	8-SOIC	28 V	9 V	Surface Mount		8-SOIC	3.9 mm	0.154 in	150 °C	-40 °C	Isolated	Current Limiting Over Temperature Over Voltage Short Circuit	17 V
ON Semiconductor NCP1380DGEVB															85 VAC	265 VAC	Flyback	Board(s)	AC/DC Primary Side	Fully Populated	4 A	Isolated	1	NCP1380	19 V

Catalog

Controller, Quasi-Resonant Current Mode

Key Features

• Quasi-resonant peak current mode control operation

• Valley switching operation with valley lockout

• Frequency foldback at light load

• Adjustable overpower protection

• Auto-recovery or latched internal output short circuit protection

• Fixed internal 80 ms timer for short circuit protection

• Combined overvoltage and overtemperature protection (A and B versions)

• Combined overvoltage protection and brownout (C and D versions)

• VCC range operation up to 28 V

Description

The NCP1380 is a high performance device aimed at powering quasi-resonant converters. Capitalizing on a proprietary valley lockout system, the controller shifts gears and reduces the switching frequency as the power loading becomes lighter. This results in a stable operation despite switching events always triggering in the drain-source valley. This system works down to the 4th valley and toggles to a variable frequency mode beyond, ensuring an excellent standby power performance. To improve the safety in the overload situations, the controller includes an Over Power Protection (OPP) circuit which clamps the delivered power at high-line. Safety-wise, a fixed internal timer relies on the feedback voltage to detect a fault. Once the timer elapses, the controller stops and stays latched for option A and C or enters auto-recovery mode for option B and D. Particularly well suited for adapter applications, the controller features a pin to implement either a combined overvoltage / overtemperature protection (version A and B) or a combined brownout / overvoltage protection (version C and D).