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NCP1218 - PWM Controller

General Description

1 Skip/Latch This pin provides a latch input to permanently disable the device under a fault condition.

It also allows the user to adjust the skip threshold.

A resistor between this pin and GND provides noise immunity to the latch input and sets the skip threshold.

Key Features

  • Fixed.
  • Frequency 65 kHz Current.
  • Mode Operation with Ramp Compensation.
  • Dynamic Self Supply Eliminates the Need for an Auxiliary Winding.
  • Timer.
  • Based Fault Protection for Improved Overload Detection.
  • Cycle Skip Reduces Input Power in Standby Mode.
  • Latched Overload Protection.
  • Internal High Voltage Startup Circuit.
  • Accurate Current Limit Detector (±5%).
  • Adjustable Skip Level.
  • Latch Input for Ea.

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Datasheet Details

Part number NCP1218
Manufacturer onsemi
File Size 274.37 KB
Description PWM Controller
Datasheet download datasheet NCP1218 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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NCP1218 PWM Controller with Adjustable Skip Level and External Latch Input The NCP1218 represents a new, pin to pin compatible, generation of the successful 7−pin current mode NCP12XX product series. The controller allows for excellent standby power consumption by use of its adjustable skip mode and integrated high voltage startup FET. 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. The Dynamic Self Supply (DSS) drastically simplifies the transformer design in avoiding the use of an auxiliary winding to supply the NCP1218.