Offline Controllers | NCP1239

Fixed Frequency Current Mode Controller for Flyback Converter with HV startup

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Overview

The NCP1239 is a fixed-frequency current-mode controller featuring the Dynamic Self-Supply. This function greatly simplifies the design of the auxiliary supply and the Vcc capacitor by activating the internal startup current source to supply the controller during start-up, transients, latch, stand-by etc. With a supply range up to 35 V, the controller hosts a jittered 65 or 100-kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current that insures excellent efficiency in light load condition. It features a timer-based fault detection that ensures the detection of overload and an adjustable compensation to help keep the maximum power independent of the input voltage.

  • Auxiliary Power
  • Industrial Power

  • AC/DC Power Adapters
  • Set-top Box

  • Fixed-frequency 65-kHz or 100-kHz current-mode control operation
  • Frequency foldback down to 26 kHz and skip mode
  • Adjustable Over Power Protection (OPP) circuit
  • High-voltage Current Source with Brown-out (BO) detection
  • Internal ramp compensation
  • Internal fixed 8-ms soft-start
  • Frequency jittering in normal and frequency foldback modes
  • 64-ms timer-based short-circuit protection with auto-recovery or latched operation
  • Pre-short ready
  • Latched OVP on Vcc (NCP1239 A & B versions)
  • Latched OVP/OTP input for improved robustness
  • 35-V Vcc operation
  • +500 mA/ -500 mA peak source/sink drive capability
  • Internal thermal shutdown
  • Extremely low no-load standby power
  • Pin-to-pin compatible with the existing NCP1236/1247 series

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Reference Price

NCP1239AD100R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

100

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239AD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3398

More Details

NCP1239BD100R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

100

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239BD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239CD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239DD100R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

F

Flyback

Current Mode

100

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239DD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239ED100R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

100

Yes

8

Yes

No

Yes

35

500 / 500

$0.3419

More Details

NCP1239ED65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

No

Yes

35

500 / 500

$0.3419

More Details

NCP1239FD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239GD100R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

100

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239HD65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239ID65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

No

Yes

35

500 / 500

$0.3368

More Details

NCP1239JD65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3398

More Details

NCP1239KD65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3447

More Details

NCP1239LD100R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

F

Flyback

Current Mode

100

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3964

More Details

NCP1239LD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3419

More Details

NCP1239MD65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

No

Yes

35

500 / 500

$0.3405

More Details

NCP1239ND65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.3398

More Details

NCP1239PD65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

No

Yes

35

500 / 500

$0.3425

More Details

NCP1239QD65R2G

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CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

No

Yes

35

500 / 500

$0.3419

More Details

NCP1239RD65R2G

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Active

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

Y

Flyback

Current Mode

65

Yes

8

Yes

Yes

Yes

35

500 / 500

$0.322

More Details

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Reliability Data

Die Related Summary Data

Device: NCP1239AD65R2G

Equivalent to wafer fab process: VHVIC

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

VHVIC

2

2577173853

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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