NCP1361: Low Power Offline Constant Current PWM Current-Mode Controller

Datasheet: Low Power Offline Constant PWM Current-Mode Controler with/without High Voltage Startup Current Source
Rev. 3 (440kB)
Product Overview
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Product Change Notification
The NCP1361 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 for constant current regulation while achieving excellent line and load regulation with traditional opto coupler and TL431 voltage reference. The NCP1361 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   Benefits
     
  • No frequency clamp, 80 or 110 kHz Maximum Switching Frequency
 
  • Prevent high frequency interference with a touchscreen
  • Quasi-Resonant with Valley Switching Operation
 
  • QR architecture offers high efficiency operation
  • Fixed Peak Current & Deep frequency foldback @ light load operation
 
  • Low light load consumption
  • Wide Operation VCC range (up to 28 V)
 
  • Design flexibility
  • Cycle by Cycle peak current limit
 
  • Safe operation
  • CS & Vs/ZCD pin Short and Open Protection
 
  • Safe operation
  • Internal Temperature Shutdown
 
  • Safe operation
  • Constant Current Primary-side feedback eliminates secondary controller
   
  • ±10% Current Regulation
   
  • Clamped Gate-drive Output for Mosfet
   
  • Built-in soft-start
   
  • Low Start-up current ( 2 μA typ.)
   
  • Less than 30 mW No-Load Performance at High Line
   
  • These are Pb-Free Devices
   
Applications   End Products
  • AC-DC USB Charging
 
  • Cell Phones
  • Tablets
  • Portable Devices
Availability & Samples
Specifications
Interactive Block Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1361AABAYSNT1G Active
Pb-free
Halide free
NCP1361 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.18
NCP1361BABAYSNT1G Active
Pb-free
Halide free
NCP1361 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.18
NCP1361EABAYSNT1G Active
Pb-free
Halide free
NCP1361 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.18
NCP1361FABAYSNT1G Obsolete
Pb-free
Halide free
NCP1361 TSOP-6 318G-02 3 260 Tape and Reel 3000  
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
ON Semiconductor   (2020-09-02 00:00) : 18,000
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
Control Mode
fsw Typ (kHz)
Stand-by Mode
UVLO (V)
Short Circuit Protection
Latch
Soft Start
VCC Max (V)
Drive Cap. (mA)
Package Type
NCP1361AABAYSNT1G  
 $0.18 
Pb
H
 Active   
Flyback
Current Mode
Variable
Yes
6.5
Yes
Yes
Yes
28
2000 / 1000
TSOP-6
NCP1361BABAYSNT1G  
 $0.18 
Pb
H
 Active   
Flyback
Current Mode
Variable
Yes
6.5
Yes
No
Yes
28
2000 / 1000
TSOP-6
NCP1361EABAYSNT1G  
 $0.18 
Pb
H
 Active   
Flyback
Current Mode
Variable
Yes
6.5
Yes
No
Yes
28
2000 / 1000
TSOP-6
Case Outlines
318G-02   
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