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NCP1200: PWM Controller, Fixed Frequency, Flyback, Current Mode

Datasheet: PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies
Rev. 19 (281kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
Housed in SO-8 or DIP-8 package, the NCP1200 represents a major leap toward ultra-compact Switch-Mode Power Supplies. Thanks to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components. Furthermore, an integrated output short-circuit protection lets the designer build an extremely low-cost AC/DC wall adapter associated with a simplified feedback scheme.

With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller drives low gate-charge switching devices like an IGBT or a MOSFET thus requiring a very small operating power. Thanks to current-mode control, the NCP1200 drastically simplifies the design of reliable and cheap offline converters with excellent audio- susceptibility and inherent pulse-by-pulse control.

When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at low peak current, no acoustic noise takes place.

Finally, the IC is self-supplied from the DC rail, eliminating the need of an auxiliary winding. This feature ensures operation in presence of low output voltage or shorts.
Features
 
  • No Auxiliary Winding Operation
  • Internal Output Short-Circuit Protection
  • Extremely Low No-Load Standby Power
  • Current-Mode with Skip-Cycle Capability
  • Internal Leading Edge Blanking
  • 250 mA Peak Current Source/Sink Capability
  • Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz
  • Direct Optocoupler Connection
  • Built-in Frequency Jittering for Lower EMI
  • SPICE Models Available for TRANsient and AC Analysis
  • Internal Temperature Shutdown
  • Pb-Free Packages are Available
Applications
  • AC/DC Adapters
  • Offline Battery Chargers
  • Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1200D100R2G Active, Not Rec 
Pb-free
Halide free
NCP1200 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.3467
NCP1200D40R2G Active, Not Rec 
Pb-free
Halide free
NCP1200 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.3467
NCP1200D60R2G Active, Not Rec 
Pb-free
Halide free
NCP1200 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.3467
NCP1200P100G Active, Not Rec 
Pb-free
Halide free
NCP1200 PDIP-8 626-05 NA Tube 50 $0.3867
NCP1200P40G Active, Not Rec 
Pb-free
Halide free
NCP1200 PDIP-8 626-05 NA Tube 50 $0.4091
NCP1200P60G Active, Not Rec 
Pb-free
Halide free
NCP1200 PDIP-8 626-05 NA Tube 50 $0.3867
Market Leadtime (weeks) : 4 to 8
Avnet   (2020-08-19 00:00) : >1K
FutureElectronics   (2020-08-19 00:00) : >1K
PandS   (2020-09-14 00:00) : >10K
Market Leadtime (weeks) : 2 to 4
FutureElectronics   (2020-08-19 00:00) : >1K
Market Leadtime (weeks) : 4 to 8
PandS   (2020-09-14 00:00) : >10K
Market Leadtime (weeks) : 13 to 16
PandS   (2020-09-14 00:00) : >1K
Avnet   (2020-08-19 00:00) : >1K
ON Semiconductor   (2020-09-02 00:00) : 8,600
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 14,950
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 340,550
PandS   (2020-09-14 00:00) : >10K
Case Outlines
751-07    626-05   
Packages
NCP1200: PWM Controller, Fixed Frequency, Flyback, Current Mode
NCP1200: PWM Controller, Fixed Frequency, Flyback, Current Mode
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