Onsemi NCP1605

Description

The NCP1605 is a controller that exhibits near−unity power factorwhile operating in fixed frequency, Discontinuous Conduction Mode(DCM) or in Critical Conduction Mode (CRM).Housed in a SOIC−16 package, the circuit incorporates all thefeatures necessary for building robust and compact PFC stages, witha minimum of external components. In addition, it integrates the skipcycle capability to lower the standby losses to a minimum.

Features

• Near−Unity Power Factor
• Fixed Frequency, Discontinuous Conduction Mode Operation
• Critical Conduction Mode Achievable in Most Stressful Conditions
• Lossless High Voltage Current Source for Startup
• Soft Skip Cycle for Low Power Standby Mode
• Switching Frequency up to 250 kHz
• Synchronization Capability
• Fast Line / Load Transient Compensation
• Valley Turn On
• High Drive Capability: −500 mA / +800 mA
• Signal to Indicate that the PFC is Ready for Operation(“pfcOK” Pin)
• VCC range: from 10 V to 20 V
• Follower Boost Operation
• Two VCC Turn−On Threshold Options:15 V for NCP1605 & NCP1605B; 10.5 V for NCP1605A
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHSCompliant

Typical applications

• PC Power Supplies
• All Off Line Appliances Requiring Power Factor Correction

More information

• Datasheet
• IC product information