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Power Factor Controllers | NCP1632

Critical Conduction Mode (CrM) Power Factor Controller, Interleaved

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Overview

The NCP1632 integrated 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 NCP1632 drivers are 180o 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.

  • All Off Line Appliance Requiring Power Factor Correction
  • SMPS
  • Flat panel TVs
  • Computer Power Supplies
  • LCD TV
  • Server power, networking power
  • 180° out of phase operation
  • Frequency Clamped Critical conduction Mode (FCCrM) operation
  • Frequency foldback at low power
  • Integrated Overcurrent protection, Overvoltage protection, UVLO and brown-out protection

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PFC Mode

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NCP1632DR2G

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Active

CAD Model

Pb

A

H

P

SOIC-16

751B-05

1

260

REEL

2500

Y

CRM

Variable

Voltage Mode

Step-Up

Up to 500

20

500 / 500

9.5 - 12

Yes

Yes

-

$0.6958

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