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

Overview
Specifications
Packages
Applications
Datasheet: PWM Controller, Fixed Frequency, Flyback, Current Mode
Rev. 18 (268.0kB)
»View Reliability Data
»View Material Composition
»Product Change Notification (13)
Product Overview
Product Description
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.)
Technical Documentation & Design Resources
Design & Development Tools (3) Data Sheets (1)
Application Notes (10) Package Drawings (2)
Simulation Models (3)  
Availability and Samples
Product
Status
Compliance
Description
Package
MSL*
Container
Budgetary Price/Unit
Type
Case Outline
Type
Qty.
NCP1200D100R2G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode SOIC-8 751-07 1 Tape and Reel 2500 $0.4093
NCP1200D40R2G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode SOIC-8 751-07 1 Tape and Reel 2500 $0.4093
NCP1200D60R2G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode SOIC-8 751-07 1 Tape and Reel 2500 $0.4093
NCP1200P100G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode PDIP-8 626-05 NA Tube 50 $0.4467
NCP1200P40G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode PDIP-8 626-05 NA Tube 50 $0.4467
NCP1200P60G Active
Pb-free
Halide free
PWM Controller, Fixed Frequency, Flyback, Current Mode PDIP-8 626-05 NA Tube 50 $0.4467
Moisture Sensitivity level (MSL) for surface mount devices (lead free measured at 260°C reflow, non lead free at 235°C reflow)
Market Leadtime (weeks) :
Arrow   (2014-09-01 08:04) : 2500
Avnet   (2014-08-29 00:00) : >1K
Chip1Stop   (2014-08-29 00:00) : >1K
Digi-Key   (2014-08-29 00:00) : <1K
Future Electronics   (2014-08-29 00:00) : >1K
Mouser   (2014-08-29 00:00) : >1K
Newark   (2014-08-29 00:00) : >1K
P&S   (2014-08-29 00:00) : >10K
Market Leadtime (weeks) :
Avnet   (2014-08-29 00:00) : >1K
Digi-Key   (2014-08-29 00:00) : >1K
Mouser   (2014-08-29 00:00) : >1K
Market Leadtime (weeks) :
Avnet   (2014-08-29 00:00) : >1K
Digi-Key   (2014-08-29 00:00) : >1K
Mouser   (2014-08-29 00:00) : >1K
P&S   (2014-08-29 00:00) : >10K
WPI   (2014-08-29 00:00) : >10K
Market Leadtime (weeks) :
Arrow   (2014-09-01 08:04) : 18938
Avnet   (2014-08-29 00:00) : >1K
Digi-Key   (2014-08-29 00:00) : >1K
Mouser   (2014-08-29 00:00) : <1K
Newark   (2014-08-29 00:00) : >1K
P&S   (2014-08-29 00:00) : >1K
Market Leadtime (weeks) :
Arrow   (2014-09-01 08:04) : 900
Avnet   (2014-08-29 00:00) : <100
Digi-Key   (2014-08-29 00:00) : <1K
Mouser   (2014-08-29 00:00) : <1K
Newark   (2014-08-29 00:00) : <100
Market Leadtime (weeks) :
Avnet   (2014-08-29 00:00) : <100
Digi-Key   (2014-08-29 00:00) : >1K
Mouser   (2014-08-29 00:00) : <1K
Newark   (2014-08-29 00:00) : <1K
P&S   (2014-08-29 00:00) : >10K
Datasheet: PWM Controller, Fixed Frequency, Flyback, Current Mode
Rev. 18 (268.0kB)
»View Reliability Data
»View Material Composition
»Product Change Notification (13)
Product Overview

Product Compliance Status Description 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
 Pb-free 
 Halide free 
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode   Flyback   Current Mode   100   Yes   No   Yes   No   No   16   250 / 250   SOIC-8 
 Pb-free 
 Halide free 
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode   Flyback   Current Mode   40   Yes   No   Yes   No   No   16   250 / 250   SOIC-8 
 Pb-free 
 Halide free 
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode   Flyback   Current Mode   60   Yes   No   Yes   No   No   16   250 / 250   SOIC-8 
 Pb-free 
 Halide free 
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode   Flyback   Current Mode   100   Yes   No   Yes   No   No   16   250 / 250   PDIP-8 
 Pb-free 
 Halide free 
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode   Flyback   Current Mode   40   Yes   No   Yes   No   No   16   250 / 250   PDIP-8 
 Pb-free 
 Halide free 
 Active     PWM Controller, Fixed Frequency, Flyback, Current Mode   Flyback   Current Mode   60   Yes   No   Yes   No   No   16   250 / 250   PDIP-8 
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