NCP1631: Power Factor Controller, 2-Phase, Interleaved
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The NCP1631 is a controller for use in 2-phase interleaved power factor correction pre-converters. Interleaving consists of paralleling two small stages in lieu of a single big stage. This approach has several merits like ease of implementation, ability to use smaller components, and better distribution of heating. These attributes make the interleaved PFC topology attractive to slim form factor applications such as flat panel TVs and ultra-slim notebook adapters. Interleaving can also extend the power range of Critical Conduction Mode, which is an efficient and cost-effective (no need for low trr diodes) operating mode. The NCP1631 operates in Frequency Clamped Critical Conduction mode (FcCrM). The circuit utilizes frequency foldback to linearly decay the clamping frequency as a function of power. As a result, the NCP1631 provides optimized efficiency across the load range. In addition, the NCP1631 drivers exhibit a 180 phase shift for a significantly reduced current ripple, which lowers EMI and reduces the rms current in the bulk capacitor. The NCP1631 incorporates all the features necessary for building robust and compact interleaved PFC stages, with a minimum of external components. Available in SOIC-16 package.
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Technical Documentation & Design Resources
Design & Development Tools (1) | Data Sheets (1) |
Tutorials (1) | Package Drawings (1) |
Application Notes (2) | Evaluation Board Documents (1) |
Reference Manuals (1) | FAQ (2) |
Availability & Samples
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Specifications
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Application Diagram
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NCP1631DR2G | Active |
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NCP1631 | SOIC-16 | 751B-05 | 1 | 260 | Tape and Reel | 2500 | $0.7333 |
Market Leadtime (weeks) | : | 8 to 12 |
PandS (2020-09-14 00:00) | : | <1K |
FutureElectronics (2020-08-19 00:00) | : | >1K |
Product
Description
Pricing ($/Unit)
Compliance
Status
PFC Mode
Frequency Operation
Control Mode
Topology
fSW Typ (kHz)
VCC Max (V)
Drive Cap. (mA)
UVLO (V)
Latch
UVP
Inhibition
Package Type
NCP1631DR2G
$0.7333
Pb
A
H
P
Active
CRM
Variable
Voltage Mode
Step-Up
Up to 500
20
500 / 500
9.5 - 12
Yes
Yes
YES
SOIC-16
Support |