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Overview
| Topology | Power Factor Correction |
| Input voltage | 90 V |
| Output 1 | 390 V |
| IC revision | 1 |
Description
The NCP1631 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 cost−effective technique (no need for low trr diodes). In addition, the NCP1631 drivers are 180° phase shift 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.
Features
- Near−Unity Power Factor
- Substantial 180° Phase Shift in All Conditions Including TransientPhases
- Frequency Clamped Critical Conduction Mode (FCCrM) i.e.,Fixed Frequency, Discontinuous Conduction Mode Operation withCritical Conduction Achievable in Most Stressful Conditions
- FCCrM Operation Optimizes the PFC Stage Efficiency Over theLoad Range
- Out−of−phase Control for Low EMI and a Reduced rms Current inthe Bulk Capacitor
- Frequency Fold−back at Low Power to Further Improve the LightLoad Efficiency
- Accurate Zero Current Detection by Auxiliary Winding for ValleyTurn On
- Fast Line / Load Transient Compensation
- 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 VSafety Features
- Output Over and Under Voltage Protection
- Brown−Out Detection with a 50−ms Delay to Help Meet Hold−up Time Specifications
- Soft−Start for Smooth Start−up Operation
- Programmable Adjustment of the Maximum Power
- Over Current Limitation
- Detection of Inrush Currents
Typical applications
- All Off Line Appliances Requiring Power Factor
- LCD / Plasma Flat Panels
- Computer Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | ISAT(A) | fres(MHz) | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Simulation– | Downloads6 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-TBL Series 3137 - 5.00 mm Close Horizontal PCB Header | Pins3 | PCB/Cable/PanelPCB | ModularityNo | TypeHorizontal | – | – | Rated Current20 A | – | – | – | – | – | Length17 mm | – | – | MountTHT | |||
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 | WE-FI Leaded Toroidal Line Choke, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FI Leaded Toroidal Line Choke | – | – | – | – | – | – | Rated Current6.1 A | Inductance0.15 mH | DC Resistance45 mΩ | – | – | – | Length27.5 mm | Width13.6 mm | – | MountTHT | |||
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| WE-TIS Radial Leaded Wire Wound Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TIS Radial Leaded Wire Wound Inductor | – | – | – | – | Saturation Current0.25 A | Self Resonant Frequency1.7 MHz | Rated Current0.35 A | Inductance1 mH | DC Resistance2300 mΩ | – | – | MaterialNiZn | Length7.8 mm | Width7.8 mm | Height7.5 mm | MountTHT | ||||
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