NCP1360: Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller

The NCP1360 offers 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 saves the secondary feedback circuitry (opto-coupler and TL431 reference) while achieving excellent line and load regulation. The NCP1360 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
  • Quasi-Resonant with Valley Switching Operation
  • Fixed Peak Current & Deep frequency foldback @ light load operation
  • Cycle by Cycle peak current limit
  • Wide Operation VCC range (up to 28 V)
  • Internal Temperature Shutdown
  • CS & Vs/ZCD pin Short and Open Protection
  • Constant Current Primary-side feedback eliminates secondary controller
  • ±10% Current Regulation
  • Build-in soft-sart
  • Clamped Gate-drive Output for Mosfet
  • Less than 30 mW No-Load Performance
Benefits
  • Prevents high frequency interference with a touchscreen
  • Offers high efficiency operation
  • Low consumption at light load
  • Safe operation
  • Design flexibility
  • Safe operation
  • Safe operation
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1360, NCP1361, NCP1365, NCP1366 Design Mathcad worksheetNCP1360 Design Worksheet Mathcad (508kB)2.1Apr, 2015
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with/without High Voltage Startup Current SourceNCP1360/D (370kB)4Mar, 2016
Package Drawings (1)
Document TitleDocument ID/SizeRevision
TSOP-6318G-02 (64.1kB)V
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1360AABCYSNT1GActivePb-free Halide freeTSOP-6318G-023Tape and Reel3000$0.2267
NCP1360BABCYSNT1GActivePb-free Halide freeTSOP-6318G-023Tape and Reel3000$0.2267
NCP1360BBCCYSNT1GProduct PreviewPb-free Halide freeTSOP-6318G-023Tape and Reel3000Contact BDTIC
NCP1360BCCCYSNT1GProduct PreviewPb-free Halide freeTSOP-6318G-023Tape and Reel3000Contact BDTIC
Specifications
ProductTopologyControl Modefsw Typ (kHz)Stand-by ModeUVLO (V)Short Circuit ProtectionLatchSoft StartVCC Max (V)Drive Cap. (mA)
NCP1360AABCYSNT1GFlybackCurrent ModeVariableYes6.5YesYesYes282000 / 1000
NCP1360BABCYSNT1GFlybackCurrent ModeVariableYes6.5YesNoYes282000 / 1000
NCP1360BBCCYSNT1GFlybackCurrent ModeVariableYes6.5YesNoYes282000 / 1000
NCP1360BCCCYSNT1GFlybackCurrent ModeVariableYes6.5YesNoYes282000 / 1000
Low Power Offline Constant Current & Constant Voltage Primary Side PWM Current-Mode Controller with/without High Voltage Startup Current Source (370kB) NCP1365
NCP1360, NCP1361, NCP1365, NCP1366 Design Mathcad worksheet NCP1365
TSOP-6 STF202