Power Factor Controllers | NCP1937

Combo Power Factor Correction + QR Flyback Controller

Availability & Samples

Favorite

Datasheet
CAD Model

CAD Model

Overview

This combination IC integrates power factor correction (PFC) and quasi-resonant flyback functionality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application.

The PFC stage exhibits near-unity power factor while operating in a Critical Conduction Mode (CrM) with a maximum frequency clamp. The circuit incorporates all the features necessary for building a robust and compact PFC stage while minimizing the number of external components.

The quasi-resonant current-mode flyback stage features a proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 4th valley and toggles to a frequency foldback mode with a minimum frequency clamp beyond the 4th valley to eliminate audible noise. Skip mode operation allows excellent efficiency in light load conditions while consuming very low standby power consumption.

  • Adapters
  • Combo PFC+QR
  • All-In-One (AIO) Computers
  • High Power Notebook Adapters
  • <10mW No Load Standby Performance
  • High Voltage Startup Circuit and Active Input Filter Capacitor Discharge Circuitry
  • High Voltage Line Voltage Detector
  • Integrated High Voltage Switch Disconnects PFC Feedback Resistor Divider
  • Fault Input for Severe Fault Conditions
  • Bi-Level Line-Dependent Output Voltage
  • Boost Diode Short-Circuit Protection
  • Adjustable PFC Disable Threshold Based on Output Power
  • Frequency Foldback with Minimum Frequency Clamp
  • Minimum Frequency Clamp
  • Valley Switching Operation with Valley-Lockout
  • PFC
  • QR Flyback Controller

Material Composition

Product Change Notification

Search

Close Search

Products:

9

Share

Sort by

  • Price/Unit

Product Groups:

┗

Orderable Parts:

9

Product

Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

PFC Mode

Frequency Operation

Control Mode

Topology

fSW Typ (kHz)

VCC Max (V)

Drive Cap. (mA)

UVLO (V)

Latch

UVP

Inhibition

Pricing ($/Unit)

NCP1937B3DR2G

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

$0.8234

More Details

NCP1937A3DR2G

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8234

More Details

NCP1937A2DR2G

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937C61DR2G

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937C4DR2G

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937B1DR2G

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

$0.8637

More Details

NCP1937C1DR2G

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937A1DR2G

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937B2DR2G

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

Price N/A

More Details

Show More

1-25 of 25

Products per page

Jump to :

1
Email Sales
Please provide a first name.
Please provide a last name.
Please provide a company/university name.
Please provide a valid email.
Please choose a country.
Please choose a job title.
Please provide a how could we help you.
You have to agree with the privacy policy.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Hello, your current browser settings are preventing us from processing your submission. You can adjust your browser settings and reload the page or you can submit an email directly to inside.sales@onsemi.com

You might also try the following:

  • Clear your browser cookies
  • Try to open this page in anonymous browser window
  • Try a different browser
  • Make sure you have reliable internet connection