深圳市中立信电子科技有限公司

NCP1027P065G

High-Voltage Switcher  for Medium Power Offline  SMPS Featuring Low  Standby Power

交流/直流转换器 PWM Current Mode Controller

The NCP1027P065G 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 activity until sufficient input level is reached.

NCP1027P065G Features

• Built−in 700 V MOSFET with Typical RDS(on) of 5.8 , 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 and Lossless Startup Sequence

• Auto−Recovery Output Short Circuit Protection with Timer−Based Detection

• Auto−Recovery Overvoltage Protection with Auxiliary Winding Operation

• Programmable Brown−Out Input for Low Input Voltage Detection

• Programmable Over Power Protection

• Input to Permanently Latchoff the Part

• Internal Frequency Jittering for Improved EMI Signature

• Extended Duty Cycle Operation to 80% Typical

• No−Load Input Standby Power of 85 mW @ 265 Vac

• 500 mW Loaded, Input Power of 715 mW @ 230 Vac

• These Devices are Pb−Free and are RoHS Compliant

NCP1027P065G Typical Applications

• Medium Power AC−DC Adapters for Chargers

• Auxiliary/Standby Power Supplies for ATX and TVS Power Supplies