|
NCP1632 Datasheet, PDF (1/25 Pages) ON Semiconductor – Interleaved, 2-Phase Power Factor Controller | |||
|
NCP1632
Interleaved, 2-Phase Power
Factor Controller
The NCP1632 integrates a dual MOSFET driver for interleaved
PFC applications. Interleaving consists of paralleling two small
stages in lieu of a bigger one, more difficult to design. This approach
has several merits like the ease of implementation, the use of smaller
components or a better distribution of the heating.
Also, Interleaving extends the power range of Critical Conduction
Mode that is an efficient and costâeffective technique (no need for
low trr diodes). In addition, the NCP1632 drivers are 180° phase
shifted for a significantly reduced current ripple.
Housed in a SOIC16 package, the circuit incorporates all the
features necessary for building robust and compact interleaved PFC
stages, with a minimum of external components.
General Features
⢠NearâUnity Power Factor
⢠Substantial 180° Phase Shift in All Conditions Including Transient
Phases
⢠Frequency Clamped Critical Conduction Mode (FCCrM) i.e.,
Fixed Frequency, Discontinuous Conduction Mode Operation with
Critical Conduction Achievable in Most Stressful Conditions
⢠FCCrM Operation Optimizes the PFC Stage Efficiency Over the
Load Range
⢠Outâofâphase Control for Low EMI and a Reduced rms Current in
the Bulk Capacitor
⢠Frequency Foldâback at Low Power to Further Improve the Light
Load Efficiency
⢠Accurate Zero Current Detection by Auxiliary Winding for Valley
Turn On
⢠Fast Line / Load Transient Compensation
⢠High Drive Capability: â500 mA / +800 mA
⢠Signal to Indicate that the PFC is Ready for Operation
(âpfcOKâ Pin)
⢠VCC Range: from 10 V to 20 V
Safety Features
⢠Output Over and Under Voltage Protection
⢠BrownâOut Detection with a 500âms Delay to Help Meet Holdâup
Time Specifications
⢠SoftâStart for Smooth Startâup Operation
⢠Programmable Adjustment of the Maximum Power
⢠Over Current Limitation
⢠Detection of Inrush Currents
Typical Applications
⢠Computer Power Supplies
⢠LCD / Plasma Flat Panels
⢠All Off Line Appliances Requiring Power Factor Correction
www.onsemi.com
MARKING DIAGRAM
SOICâ16
D SUFFIX
CASE 751B
A
WL
Y
WW
G
NCP1632G
AWLYWW
= Assembly Location
= Wafer Lot
= Year
= Work Week
= PbâFree Package
PIN ASSIGNMENT
ZCD2
1
FB
ZCD1
REF5V/pfcOK
Rt
OSC
DRV1
GND
Vcontrol
FFOLD
Vcc
DRV2
BO
OVP / UVP
(Top View)
Latch
CS
ORDERING INFORMATION
Device
Package
Shippingâ
NCP1632DR2G SOICâ16 2500 / Tape & Reel
(PbâFree)
â 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, 2017
1
July, 2017 â Rev. 0
Publication Order Number:
NCP1632/D
|
▷ |