Quasi-Resonant Controller, High-Voltage, Featuring Valley Lock-Out Switching

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Overview

The NCP1340 is a highly integrated quasi−resonant flyback controller suitable for designing high−performance off−line power converters. With an integrated active X2 capacitor discharge feature, the NCP1340 can enable no−load power consumption below 30 mW. The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to a frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1340 enters quiet−skip mode to manage the power delivery. To help ensure converter ruggedness, the NCP1340 implements several key protective features such as internal brownout detection, a non−dissipative Over Power Protection (OPP) for constant maximum output power regardless of input voltage, a latched over voltage and NTC−ready over temperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the line is removed.

  • Medium or High Power AC-DC Adapters
  • Ultra High Density AC-DC Adapters
  • Notebook Adpaters
  • Flat TV SMPS
  • Computer Power Supplies
  • Phone and Tablet Adapters
  • QR Frequency Jittering
  • New Quiet-Skip Technology
  • Integrated HV Startup with Brownout Protection
  • Valley Switching Operation with Valley Lockout
  • Integrated X2 Capacitor Discharge Capability
  • NTC Compatible Fault Pin
  • High Drive Capability: -500 mA / +800 mA
  • Latch input for OVP and OTP implementations

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11

Product

Status

ECAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Topology

Control Mode

fsw Typ (kHz)

Stand-by Mode

UVLO (V)

Short Circuit Protection

Latch

Soft Start

VCC Max (V)

Drive Cap. (mA)

Pricing ($/Unit)

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NCP1340B4D1R2G

Active

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.4877

More Details

NCP1340B8D1R2G

Active

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.4881

More Details

NCP1340B3D1R2G

Active

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.4881

More Details

NCP1340B7D1R2G

Active

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.5118

More Details

NCP1340B6DR2G

Last Shipments

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

Price N/A

More Details

NCP1340B5D1R2G

Active

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.4877

More Details

NCP1340B9D1R2G

Active

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.485

More Details

NCP1340A3D1R2G

Last Shipments

Pb

A

H

P

SOIC-9 NB

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

9

Yes

Yes

Yes

30

500 / 800

Price N/A

More Details

NCP1340A6DR2G

Last Shipments

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

9

Yes

Yes

Yes

30

500 / 800

Price N/A

More Details

NCP1340B10DR2G

Active

Pb

A

H

P

SOIC-8

1

260

REEL

2500

Y

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

$0.414

More Details

NCP1340B1DR2G

Last Shipments

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

9

Yes

No

Yes

30

500 / 800

Price N/A

More Details

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