Offline Controllers | NCP1256

Low Power Offline PWM Current Mode Controller with Brown-Out Protection

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Overview

The NCP1256 includes everything to build cost-effective switch mode power supplies ranging from a few watts up to several tens of watts. Housed in a tiny TSOP-6 package, the part can be supplied up to 30 V. It hosts a jittered 65 or 100-kHz switching circuitry operated in peak current mode control. When the power in the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current. NCP1256 comes with several protection features such as a timer-based auto-recovery short circuit protection, lossless OPP, and an easily adjustable Brown Out (BO) pin. Two inputs are provided to latch off the part in a practical way, for instance with OVP and OTP events. Several options exists to chose latch or auto-recovery.

  • Ac−dc Adapters for Portable Devices
  • Ac−dc Adapters for Computers
  • Ac−dc Adapters for Tablets
  • General Ac−dc Adapters

  • Ac-dc Adapters

  • Frequency Foldback down to 26 kHz and Skip−cycle in Light Load Conditions
  • 70−ms Timer−based Auto−recovery Short−circuit Protection
  • Frequency Jittering in Normal and Frequency Foldback Modes
  • +500 mA/ −500 mA Source/Sink Drive Capability
  • Fixed−frequency 65−kHz or 100−kHz Current−mode Control Operation
  • Pb−Free Device
  • Adjustable Over Power Protection (OPP) Circuit, Disabled at Low Line
  • Adjustable Brown Out Level
  • Internally−fixed Slope Compensation Ramp
  • Internally−fixed 4−ms Soft−start
  • Double Hiccup Auto−recovery Short−circuit Protection
  • Pre−short Ready for Latched OCP Option
  • Latched OVP Protection on Vcc
  • Latched Inputs for Improved Robustness (OVP and OTP implementations)
  • EPS 2.0 Compliant

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Reference Price

NCP1256ASN100T1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

3

260

REEL

3000

N

Flyback

Current Mode

100

Yes

8.3

Yes

Yes

Yes

35

500 / 500

$0.2133

More Details

NCP1256ASN65T1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

3

260

REEL

3000

N

Flyback

Current Mode

65

Yes

8.3

Yes

Yes

Yes

35

500 / 500

$0.2133

More Details

NCP1256BSN100T1G

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Obsolete

Similar Products
CAD Model

Pb

A

H

P

TSOP-6

318G-02

3

260

REEL

3000

N

Flyback

Current Mode

100

Yes

8.3

Yes

No

Yes

35

500 / 500

Price N/A

More Details

NCP1256BSN65T1G

Loading...

Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

3

260

REEL

3000

N

Flyback

Current Mode

65

Yes

8.3

Yes

No

Yes

35

500 / 500

$0.2133

More Details

NCP1256ESN65T1G

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Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

3

260

REEL

3000

N

Flyback

Current Mode

65

Yes

8.3

Yes

Yes

Yes

35

500 / 500

$0.2347

More Details

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Reliability Data

Die Related Summary Data

Device: NCP1256ASN100T1G

Equivalent to wafer fab process: ONC25

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

ONC25

1

2712519294

More Details

Re-calculate Data

Data is based on the following assumptions.

Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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