PWM Controller, Soft-Skip™ Standby, with Adjustable Skip Level and External Latch

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Overview

The NCP1271 represents a new, pin to pin compatible, generation of the successful 7 pin current mode NCP12XX product series. The controller allows for excellent stand by power consumption by use of its adjustable Soft Skip mode and integrated high voltage startup FET. This proprietary Soft Skip also dramatically reduces the risk of acoustic noise. This allows the use of inexpensive transformers and capacitors in the clamping network. Internal frequency jittering, ramp compensation, timer based fault detection and a latch input make this controller an excellent candidate for converters where ruggedness and component cost are the key constraints.

  • ACDC Adapters
  • Consumer Electronic Power Supplies
  • Offline Battery Chargers
  • STB, DVD, DVDR
  • Notebooks
  • LCD Monitors
  • Printers
  • Short Circuit Protection Independent of the Auxiliary Winding
  • Adjustable Soft Skip Mode
  • Internal High-Voltage Start-up
  • 5% Current Limit Accuracy over the Full Temperature Range
  • Internal Latch for Easy Implementation of Overvoltage and Overtemperature Protection
  • Frequency Jittering for Softened EMI Signature
  • +500 mA/800 mA Peak Current Drive Capability

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Products:

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4

Product

Status

CAD 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)

Reference Price

NCP1271D100R2G

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Active, Not Rec

CAD Model

Pb

A

H

P

SOIC-7

1

260

REEL

2500

Y

Flyback

Current Mode

100

Yes

Yes

Yes

Yes

Yes

20

500 / 800

$0.345

More Details

NCP1271D65R2G

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Active, Not Rec

CAD Model

Pb

A

H

P

SOIC-7

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

Yes

Yes

Yes

Yes

20

500 / 800

$0.369

More Details

NCP1271P100G

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Obsolete

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Flyback

Current Mode

100

Yes

Yes

Yes

Yes

Yes

20

500 / 800

Price N/A

More Details

NCP1271P65G

Loading...

Obsolete

CAD Model

Pb

A

H

P

PDIP-8

NA

0

TUBE

50

N

Flyback

Current Mode

65

Yes

Yes

Yes

Yes

Yes

20

500 / 800

Price N/A

More Details

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