Offline Controllers | NCV3843B

Current Mode PWM Controller

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Overview

The NCV3843BV is a high performance fixed frequency current mode controller. They are specifically designed for Off−Line and DC−DC converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, programmable output deadtime, and a latch for single pulse metering. These devices are available in a surface mount (SOIC−8) plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage.

The NCV3843BV is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).

  • Trimmed Oscillator for Precise Frequency Control
  • Oscillator Frequency Guaranteed at 250 kHz
  • Current Mode Operation to 500 kHz
  • Automatic Feed Forward Compensation
  • Latching PWM for Cycle−By−Cycle Current Limiting
  • Internally Trimmed Reference with Under-voltage Lockout
  • High Current Totem Pole Output
  • Under-voltage Lockout with Hysteresis
  • Low Startup and Operating Current
  • These are Pb−Free Devices

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NCV3843BVD1R2G

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CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

Y

Flyback

Current Mode

52

No

Yes

Yes

No

Yes

30

200 / 200

$0.5467

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NCV3843BVDR2G

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CAD Model

Pb

A

H

P

SOIC-14

751A-03

1

260

REEL

2500

Y

Flyback

Current Mode

52

No

Yes

Yes

No

Yes

30

200 / 200

$0.6013

More Details

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Reliability Data

Die Related Summary Data

Device: NCV3843BVD1R2G

Equivalent to wafer fab process: BP STD LINEAR

Product Technology

Product Technology

Equivalent Device-Hours

MTBF/MTTF in Hours

FITS

BP STD LINEAR

10

12120914040

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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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