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ON Semiconductor NCP1075, 76-77-79 A & B

Available in two different pin-out flavors of the very common PDIP 7 package, the devices offer a high level of integration.

ON Semiconductor NCP1075, 76-77-79 A and B-product-picture

Available in two different pin-out flavors of the very common PDIP 7 package, the devices offer a high level of integration, including soft start, frequency jittering, short circuit protection, skip cycle, a maximum peak current set point, ramp compensation, and a dynamic self supply (DSS, eliminating the need for an auxiliary winding).Unlike other monolithic solutions, the NCP1077-76-77-79 A & B is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65 or 100 kHz).

 

Key features

  • Built−in 700 V MOSFET
  • Current−mode fixed frequency operation – 65 / 100 kHz
  • Fixed slope compensation
  • Auto−recovery output short

     

Additional features

  • Built−in 700 V MOSFET with RDS(ON) of 13.5 Ω (NCP1075), 4.8 Ω (NCP1076/77) and 2.9 Ω (NCP1079)
  • Large creepage distance between high voltage pins
  • Current−mode fixed frequency operation – 65 / 100 kHz
  • Fixed slope compensation
  • Skip−cycle operation at low peak currents only
  • Dynamic Self−Supply: no need for an auxiliary winding
  • Internal 10 ms soft−start
  • Auto−recovery output short−circuit protection with timer−based detection
  • Auto−recovery over−voltage Protection with auxiliary winding operation
  • Adjustable brown−out protection and OVP
  • 2nd leading edge blanking – current protection
  • Over Power Protection
  • Frequency jittering for better EMI signature
  • No load input consumption < 50 mW
  • Frequency foldback to improve efficiency at light load
  • These are Pb−free devices

 

Applications

  • Auxiliary & Standby Power Supply
  • Major Home Appliances power supplies
  • Low to medium Power Chargers & Adapters
  • White Goods
  • E-Meters
  • Industrial
  • Consumer Equipment Power Supply

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