NCP1901 Datasheet, PDF (1/13 Pages) ON Semiconductor – Primary Side Combination Resonant and PFC Controllers

NCP1901
Advance Information
Primary Side Combination
Resonant and PFC
Controllers
The NCP1901 is a combination of PFC and half−bridge
resonant controllers optimized for off−line adapter
applications. This device includes all the features needed
to implement a highly efficient and small form factor
adapter. It integrates a critical conduction mode (CrM)
power factor correction (PFC) controller and a half−bridge
controller with a built−in 600 V driver. The half−bridge
stage operates at a fixed frequency. Regulation is achieved
by adjusting the PFC stage output voltage.
This device includes an enable input on the PFC
feedback pin, open feedback loop protection and PFC
overvoltage and undervoltage detectors. Other features
included in the NCP1901 are a 600 V startup circuit and an
adjustable frequency oscillator. The controllers are properly
sequenced, simplifying system design.
Features
• Adjustable Half−Bridge Frequency up to 75 kHz
• Open Feedback Loop Protection
• CrM Power Factor Correction Controller
• PFC Undervoltage Detector
• PFC Overvoltage Detector
• Half−Bridge Controller with 600 V High Side Gate
Drive
• State Machine Ensures Proper Turn−on and Turn−off
of Half−Bridge Stage
• Enable Input on the PFC Feedback Pin Disables
Controllers and Reduces Power
• Controllers are Properly Sequenced for Fault Free
Operation
• Internal 600 V Startup Circuit
• This is a Pb−Free Device
Typical Applications
• High Efficiency Notebook Adapter
• Solid State Lighting
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
http://onsemi.com
SO−20 WB
DW SUFFIX
CASE 751D
SOIC−16
D SUFFIX
CASE 751B
MARKING
DIAGRAM
16
NCP1901G
AWLYWW
1
20
NCP1901
AWLYYWWG
1
NCP1901 = Specific Device Code
A
= Assembly Location
WL = Wafer Lot
Y or YY = Year
WW = Work Week
G
= Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping^†
NCP1901DR2G
SOIC−16 2500/Tape & Reel
(Pb−Free)
NCP1901DWR2G SO−20 WB 1000/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2009
1
February, 2009 − Rev. P0
Publication Order Number:
NCP1901/D