Combo Power Factor Correction + QR Flyback Controller

Favorite

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

Product List

If you wish to buy products or product samples, please log in to your onsemi account.

Search

Close Search

Products:

9

Share

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

Reference Price

NCP1937A1DR2G

Loading...

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937A2DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937A3DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8398

More Details

NCP1937B1DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

$0.8637

More Details

NCP1937B2DR2G

Loading...

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

Price N/A

More Details

NCP1937B3DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

$0.8398

More Details

NCP1937C1DR2G

Loading...

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937C4DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937C61DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

Show More

1-25 of 25

Products per page

Jump to :