NCP1631
NCP1631 is 2-Phase Power Factor Controller manufactured by onsemi.
features necessary for building robust and pact interleaved PFC stages, with a minimum of external ponents.
General Features
- Near- Unity Power Factor
- Substantial 180 Phase Shift in All Conditions Including Transient
Phases
- Frequency Clamped Critical Conduction Mode (FCCr M) i.e.,
Fixed Frequency, Discontinuous Conduction Mode Operation with Critical Conduction Achievable in Most Stressful Conditions
- FCCr M Operation Optimizes the PFC Stage Efficiency Over the
Load Range
- Out- of- phase Control for Low EMI and a Reduced rms Current in the Bulk Capacitor
- Frequency Fold- back 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 pensation
- High Drive Capability:
- 500 m A / +800 m A
- Signal to Indicate that the PFC is Ready for Operation (“pfc OK”
Pin)
- VCC Range: from 10 V to 20 V
SOIC- 16 D SUFFIX CASE 751B
MARKING DIAGRAM
NCP1631G AWLYWW
= Assembly Location
WL = Wafer Lot
= Year
WW = Work Week
= Pb- Free Package
PIN ASSIGNMENT
ZCD2 1
ZCD1 REF5V/pfc OK
Rt OSC
DRV1 GND
Vcontrol FFOLD
Vcc DRV2
BO OVP /...
