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NCP1361 - Low Power Offline Constant Current PWM Controller

Description

Pin out NCP1366 Pin out NCP1361 Name 1 6 Vs/ZCD 2 5 FB 3 4 CS 4 3 DRV 5 2 GND 6 1 VCC 7 NC 8 HV Function Connected to the auxiliary winding; this pin senses the voltage output for the primary regulation and detects the core reset event for the Quasi

Features

  • ±10% Current Regulation.
  • 560 V Startup Current Source.
  • No Frequency Clamp, 80 or 110 kHz Maximum Switching Frequency Options.
  • Quasi.
  • Resonant Operation with Valley Switching Operation.
  • Fixed Peak Current & Deep Frequency Foldback @ Light Load Operation.
  • External Constant Voltage Feedback Adjustment.
  • Cycle by Cycle Peak Current Limit.
  • Built.
  • In Soft.
  • Start.
  • Over & Under Output Voltage Protection.

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Datasheet Details

Part number NCP1361
Manufacturer onsemi
File Size 917.50 KB
Description Low Power Offline Constant Current PWM Controller
Datasheet download datasheet NCP1361 Datasheet

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Full PDF Text Transcription

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Low Power Offline Constant Current PWM Current-Mode Controller with/without High Voltage Startup Current Source NCP1361, NCP1366 The NCP1361/66 offers a new solution targeting output power levels from a few watts up to 20 W in a universal−mains flyback application. Due to a novel method this new controller offers a primary−side constant current control, saving secondary−side components to perform current regulation. The NCP1361/66 operates in valley−lockout quasi−resonant peak current mode control mode at nominal load to provide high efficiency. When the secondary−side power starts diminishing, the switching frequency naturally increases until a voltage−controlled oscillator (VCO) takes the lead, synchronizing the MOSFET turn−on in a drain−source voltage valley.
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