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NCP1249 - High-Voltage Current-Mode PWM Controller

Description

11 X2 X2 capacitors discharge When the voltage on this pin disappears, the controller ensures the X2

capacitors discharge.

mode) when brought above 8 V (A/B) or below 0.4 V (C/D).

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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Datasheet preview – NCP1249

Datasheet Details

Part number NCP1249
Manufacturer ON Semiconductor
File Size 1.07 MB
Description High-Voltage Current-Mode PWM Controller
Datasheet download datasheet NCP1249 Datasheet
Additional preview pages of the NCP1249 datasheet.

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Full PDF Text Transcription

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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.
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