NCP1027 Datasheet (ON Semiconductor)

NCP1027, High Voltage Switcher

Pin No.

Symbol Function 1 VCC Powers the Internal Circuitry 2 Ramp Comp.

Ramp Compensation in CCM 3 Brown *Out Brown *Out and Latchoff Input 4 FB Feedback Signal Input 5 Drain Drain Connection * * * 7 OPP Over Power Protection 8 GND The IC Grou

NCP1027 High-Voltage Switcher for Medium Power Offline SMPS Featuring Low Standby Power The NCP1027 offers a new solution targeting output power levels from a few watts up to 15 W in a universal mains flyback application.

Our proprietary high voltage technology lets us include a power MOSFET together with a startup current source, all directly connected to the bulk capacitor.

To prevent lethal runaway in low input voltage conditions, an adjustable brown out circuitry blocks the

NCP1027 Features

* Built

* in 700 V MOSFET with Typical RDS(on) of 5.8 W, TJ = 25°C

* Current

* Mode Fixed Frequency Operation: 65 kHz and 100 kHz

* Fixed Peak Current of 800 mA

* Skip

* Cycle Operation at Low Peak Currents

* Internal Current Source for Clean