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NCP1217 Series 16 V 146 kHz Enhanced PWM Current-Mode Controller - SOIC-8

Modèle ECAD:
Nom du fabricant: onsemi
Emballage standard:
Product Variant Information section
Code de date:
Product Specification Section
Caractéristiques techniques
Attributes Table
Supply Current-Max: 5mA
Supply Voltage: 16V
Turn On Threshold Voltage: 12.8V
Turn Off Threshold Voltage: 7.6V
Duty Cycle-Max: 80%
Frequency-Max: 146kHz
Operating Temp Range: 0°C to 150°C
Style d'emballage :  SOIC-8
Méthode de montage : Surface Mount
Fonctionnalités et applications

The NCP1217 is a Enhanced PWM Current-Mode Controller for High-Power Universal Off-Line Supplies.

Housed in an SO−8 or PDIP−7 package, the NCP1217 represents the enhanced version of the NCP1203−based controllers. Thanks to its high drive capability, NCP1217 drives large gate−charge MOSFETs, which together with internal ramp compensation and built−in overvoltage protection, ease the design of modern AC/DC adapters. NCP1217 offers a true alternative to UC384X−based designs. With an internal structure operating at different fixed frequencies (65–100–133 kHz), the controller features a high−voltage startup FET, which ensures a clean and loss less startup sequence. Its current−mode control topology provides an excellent input audio−susceptibility and inherent pulse−by−pulse control. Internal ramp compensation easily prevents subharmonic oscillations from taking place in continuous conduction mode designs. When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so−called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at a user adjustable low peak current, no acoustic noise takes place. The NCP1217 features two efficient protective circuitries: 1) In
presence of an overcurrent condition, the output pulses are disabled and the device enters a safe burst mode, trying to restart. Once the default has gone, the device auto−recovers. 2) If an external signal (e.g. a temperature sensor) pulls Pin 1 above 3.2 V, output pulses are immediately stopped and the NCP1217 stays latched in this position. Reset occurs when the VCC collapses to ground, e.g. the user unplugs the power supply.

Key Features:

  • Current−Mode with Adjustable Skip−Cycle Capability
  • Built−in Internal Ramp Compensation
  • Auto−Recovery Internal Output Short−Circuit Protection
  • Full Latchoff if Adjustment Pin is Brought High
  • Extremely Low No−Load Standby Power
  • Internal Temperature Shutdown
  • 500 mA Peak Current Capability
  • Fixed Frequency Versions at 65 kHz, 100 kHz and 133 kHz
  • Direct Optocoupler Connection
  • Internal Leading Edge Blanking
  • SPICE Models Available for TRANsient and AC Analysis
  • These are Pb−Free Devices


  • High Power AC/DC Converters for TVs, Set−Top Boxes, etc.
  • Offline Adapters for Notebooks
  • Telecom DC−DC Converters
  • All Power Supplies

To learn more about NCP1217 product family, Click Here

Pricing Section
Stock globale:
Sur commande :
Stock d'usine :Stock d'usine :
Délai d'usine :
2 Semaines
Commande minimale :
Multiples de :
1 550,00 $
Prix Internet
2 500
5 000
7 500
10 000
12 500+
Product Variant Information section