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NCP1249 Datasheet High-voltage Current-mode Pwm Controller

Manufacturer: onsemi

Overview: NCP1249 High-Voltage Current-Mode PWM Controller Featuring Peak Power Excursion and Extremely Low Stand-by Power Consumption www.onsemi.com The NCP1249 is a highly integrated high−voltage PWM controller capable of delivering a rugged and high performance offline power supply with extremely low no−load consumption. With a supply range up to 30 V, the controller hosts a jittered 65−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 a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while freezing 9 1 SOIC−9 NB D SUFFIX CASE 751BP MARKING DIAGRAM 9 NCP1249x65 ALYW G 1 the peak current setpoint.

Key Features

  • several key protective features: a internal brown.
  • out, a non.
  • dissipative Over Power Protection for a constant maximum output current regardless of the input voltage and two latched over voltage protection inputs.
  • either through a dedicated pin or via the VCC input. The controller architecture is arranged to authorize a transient peak NCP1249x65 = Specific Device Code x = A, B, C, D A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb.
  • Free Package p.

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