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NCP1236: Controller, Fixed Frequency, Current Mode, for Flyback Converters

Datasheet: Fixed Frequency Current Mode Controller for Flyback Converters
Rev. 5 (237kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
The NCP1236 is a new fixed-frequency current-mode controller featuring Dynamic Self-Supply (DSS). This device is pin-to-pin compatible with the previous NCP12xx families.
The DSS function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during transients.
Due to frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for converters where component cost is the key constraint.
In addition, the controller includes a new high voltage circuitry that combines a startup current source and a brown-out detector able to sense the input voltage either from the rectified ac line or the dc filtered bulk voltage. The high voltage sensing circuitry is used for the overpower protection purposes as well. Overpower protection, overload protection, and other protective features increase the safety and reliability of the final application.
Features   Benefits
     
  • Frequency Foldback then Skip Mode in light load and standby conditions
 
  • High efficiency in light and no load conditions
  • High voltage current source with brown-out detection and dynamic self-supply
 
  • Directly powered from the high voltage rail with integrated brown-out sensing to detect low input voltage.
  • Frequency Jittering
 
  • Helps pass EMI requirements by spreading out the energy content of frequency peaks
  • 4.0 ms Soft-Start
 
  • Minimizes the stress on power components
  • Adjustable Overpower Compensation
 
  • Monitors the input voltage to limit the amount of power being delivered by the converter
  • Latched / Autorecovery Timer-Based Overload Protection
 
  • Protects against overcurrent
Applications   End Products
  • AC-DC Adapters
  • Consumer Electronics Power Supplies
  • Auxiliary/Housekeeping power supplies
 
  • Notebooks
  • LCD TVs
  • Printers
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1236B65NBGEVB Active
Pb-free
65 W Notebook Adapter Demonstration Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1236AD100R2G Active
Pb-free
Halide free
NCP1236 SOIC-7 751U 1 260 Tape and Reel 2500 $0.3067
NCP1236AD65R2G Active
Pb-free
Halide free
NCP1236 SOIC-7 751U 1 260 Tape and Reel 2500 $0.3067
NCP1236BD100R2G Active
Pb-free
Halide free
NCP1236 SOIC-7 751U 1 260 Tape and Reel 2500 $0.3067
NCP1236BD65R2G Active
Pb-free
Halide free
NCP1236 SOIC-7 751U 1 260 Tape and Reel 2500 $0.3067
NCP1236DD65R2G Active
Pb-free
Halide free
NCP1236 SOIC-7 751U 1 260 Tape and Reel 2500 $0.3067
NCP1236ED100R2G Obsolete
Pb-free
Halide free
NCP1236, Modified Vcc(min), Vcc(on), and reduced fault timer SOIC-7 751U 1 260 Tape and Reel 2500  
Market Leadtime (weeks) : 4 to 8
Market Leadtime (weeks) : 2 to 4
PandS   (2020-09-14 00:00) : >1K
Market Leadtime (weeks) : 17 to 20
Market Leadtime (weeks) : 13 to 16
PandS   (2020-09-14 00:00) : >1K
Market Leadtime (weeks) : 4 to 8
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
NCP1236AD100R2G  
 $0.3067 
Pb
H
 Active   
Flyback
Current Mode
100
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236AD65R2G  
 $0.3067 
Pb
H
 Active   
Flyback
Current Mode
65
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236BD100R2G  
 $0.3067 
Pb
H
 Active   
Flyback
Current Mode
100
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236BD65R2G  
 $0.3067 
Pb
H
 Active   
Flyback
Current Mode
65
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
NCP1236DD65R2G  
 $0.3067 
Pb
H
 Active   
Flyback
Current Mode
65
Yes
9.5
Yes
Yes
Yes
28
500 / 500
SOIC-7
Case Outlines
751U   
Packages
NCP1236: Controller, Fixed Frequency, Current Mode, for Flyback Converters
NCP1236: Controller, Fixed Frequency, Current Mode, for Flyback Converters
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Featured Video
65 W Notebook Adapter Demonstration Evaluation Board - NCP1236B65NBGEVB Test Procedure
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