NCP1365: Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with High Voltage Startup Current Source

Description: The NCP1365 offer a new solution targeting output ...
  • The NCP1365 offer a new solution targeting output power levels from a few watts up to 20 W in a universal-mains flyback application. Thanks to a novel method this new controller eliminates the need for a secondary feedback circuitry (typically an opto-coupler and TL431 reference) while achieving excellent line and load regulation. The NCP1365 operates in valley lockout quasi-resonant peak current mode control mode at high load to provide high efficiency. When the power on the secondary side starts to diminish, the controller automatically adjusts the duty-cycle then at lower load the controller enters in pulse frequency modulation at fixed peak current with a valley switching detection. This technique allows keeping the output regulation with tiny dummy load. Valley lockout at the first 4 valleys prevent valley jumping operation and then a valley switching at lower load provides high efficiency.
  • Features
  • No frequency clamp, 80 or 110 kHz Maximum Switching Frequency - Prevents high frequency interference with a touchscreen
  • Quasi-Resonant with Valley Switching Operation - Offers high efficiency operation
  • 560-V Startup Current Source - Saves external HV FET or inefficient resistor divider
  • Fixed Peak Current & Deep frequency foldback @ light load operation - Low consumption at light load
  • Cycle by Cycle peak current limit - Safe operation
  • Wide Operation VCC range (up to 28 V) - Design flexibility
  • Internal Temperature Shutdown - Safe operation
  • CS & Vs/ZCD pin Short and Open Protection - Safe operation
  • Constant Current Primary-side feedback eliminates secondary controller
  • ±10% Current Regulation
  • Build-in soft-sart
  • Low Start-up current (2.5 μA typ.)
  • Clamped Gate-drive Output for Mosfet
  • Less than 10 mW No-Load Performance
  • Applications
  • AC-DC USB chargers for cell phones, tablets, and other portable devices
  • End Products
  • AC-DC USB chargers for cell phones, tablets, and other portable devices
  • Technical Documentation & Design Resources
    Evaluation/Development Tool Information
    Availability and Samples
    NCP1365AABCYDR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with High Voltage Startup Current Source
  • Package Type: SOIC-7
  • Package Case Outline: 751U
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • NCP1365ACBAXDR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with High Voltage Startup Current Source
  • Package Type: SOIC-7
  • Package Case Outline: 751U
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • NCP1365BABCYDR2G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with High Voltage Startup Current Source
  • Package Type: SOIC-7
  • Package Case Outline: 751U
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2500
  • Specifications
  • Topology: Flyback 
  • Control Mode: Current Mode 
  • fsw Typ (kHz): Variable 
  • Stand-by Mode: Yes  No 
  • UVLO (V): 6.5 
  • Short Circuit Protection: Yes 
  • Latch: Yes 
  • Soft Start: Yes 
  • VCC Max (V): 28 
  • Drive Cap. (mA): 2000 / 1000 
  • Package Type: SOIC-7 
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