Onsemi NCP1654

Description

The NCP1654 is a controller for Continuous Conduction Mode (CCM) Power Factor Correction step−up pre−converters. It controls the power switch conduction time (PWM) in a fixed frequency modeand in dependence on the instantaneous coil current.Housed in a SO8 package, the circuit minimizes the number ofexternal components and drastically simplifies the PFCimplementation. It also integrates high safety protection features thatmake the NCP1654 a driver for robust and compact PFC stages likean effective input power runaway clamping circuitry.

Features

• IEC61000−3−2 Compliant
• Average Current Continuous Conduction Mode
• Fast Transient Response
• Very Few External Components
• Very Low Startup Currents (<75 A)
• Very Low Shutdown Currents (< 400 A)
• Low Operating Consumption
• ±1.5 A Totem Pole Gate Drive
• Accurate Fully Integrated 65/133/200 kHz Oscillator
• Latching PWM for cycle−by−cycle Duty−Cycle Control
• Internally Trimmed Internal Reference
• Undervoltage Lockout with Hysteresis
• Soft−Start for Smoothly Startup Operation
• Shutdown Function
• Pin to Pin Compatible with Industry Standard
• This is a Pb−Free DeviceSafety Features
• Inrush Currents Detection
• Overvoltage Protection
• Undervoltage Detection for Open Loop Detection or Shutdown
• Brown−Out Detection
• Soft−Start
• Accurate Overcurrent Limitation
• Overpower Limitation

Typical applications

• White Goods, other Off−line SMPS
• Flat TVs, PC Desktops
• AC Adapters

More information

• Datasheet
• IC product information