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NCP1256: Low Power Offline PWM Current Mode Controller with Brown-Out Protection

Datasheet: Low Power Offline PWM Current Mode Controller with Brown-Out Protection
Rev. 5 (467kB)
Product Overview
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»View Material Composition
» Product Change Notification
The NCP1256 includes everything to build cost-effective switch mode power supplies ranging from a few watts up to several tens of watts. Housed in a tiny TSOP-6 package, the part can be supplied up to 30 V. It hosts a jittered 65 or 100-kHz switching circuitry operated in peak current mode control. When the power in the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current. NCP1256 comes with several protection features such as a timer-based auto-recovery short circuit protection, lossless OPP, and an easily adjustable Brown Out (BO) pin. Two inputs are provided to latch off the part in a practical way, for instance with OVP and OTP events. Several options exists to chose latch or auto-recovery.
Features   Benefits
     
  • Frequency Foldback down to 26 kHz and Skip−cycle in Light Load Conditions
 
  • More efficient light load operation
  • 70−ms Timer−based Auto−recovery Short−circuit Protection
 
  • Short circuit operation for safety yet reliable with auto-recovery for flexible restart
  • Frequency Jittering in Normal and Frequency Foldback Modes
 
  • Jitter reduces EMI by spreading the switching sprectrum over a wider band
  • +500 mA/ −500 mA Source/Sink Drive Capability
 
  • Ability to drive larger FETs
  • Pb−Free Device
 
  • Environment friendly
  • Fixed−frequency 65−kHz or 100−kHz Current−mode Control Operation
   
  • Adjustable Over Power Protection (OPP) Circuit, Disabled at Low Line
   
  • Adjustable Brown Out Level
   
  • Internally−fixed Slope Compensation Ramp
   
  • Internally−fixed 4−ms Soft−start
   
  • Double Hiccup Auto−recovery Short−circuit Protection
   
  • Pre−short Ready for Latched OCP Option
   
  • Latched OVP Protection on Vcc
   
  • Latched Inputs for Improved Robustness (OVP and OTP implementations)
   
  • EPS 2.0 Compliant
   
Applications   End Products
  • Ac−dc Adapters for Portable Devices
  • Ac−dc Adapters for Computers
  • Ac−dc Adapters for Tablets
  • General Ac−dc Adapters
 
  • Ac-dc Adapters
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1256B60WGEVB Active
Pb-free
60W, 19V Power Supply Evaluation Board
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1256ASN100T1G Active
Pb-free
Halide free
NCP1256 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.2133
NCP1256ASN65T1G Active
Pb-free
Halide free
NCP1256 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.2133
NCP1256BSN100T1G Active
Pb-free
Halide free
NCP1256 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.2133
NCP1256BSN65T1G Active
Pb-free
Halide free
NCP1256 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.2133
NCP1256ESN65T1G Active
Pb-free
Halide free
NCP1256 TSOP-6 318G-02 3 260 Tape and Reel 3000 $0.2133
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 36,000
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 489,000
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 21,000
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 15,000
Market Leadtime (weeks) : 4 to 8

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
NCP1256ASN100T1G  
 $0.2133 
Pb
H
 Active   
Flyback
Current Mode
100
Yes
8.3
Yes
Yes
Yes
35
500 / 500
TSOP-6
NCP1256ASN65T1G  
 $0.2133 
Pb
H
 Active   
Flyback
Current Mode
65
Yes
8.3
Yes
Yes
Yes
35
500 / 500
TSOP-6
NCP1256BSN100T1G  
 $0.2133 
Pb
H
 Active   
Flyback
Current Mode
100
Yes
8.3
Yes
No
Yes
35
500 / 500
TSOP-6
NCP1256BSN65T1G  
 $0.2133 
Pb
H
 Active   
Flyback
Current Mode
65
Yes
8.3
Yes
No
Yes
35
500 / 500
TSOP-6
NCP1256ESN65T1G  
 $0.2133 
Pb
H
 Active   
Flyback
Current Mode
65
Yes
8.3
Yes
Yes
Yes
35
500 / 500
TSOP-6
Case Outlines
318G-02   
Previously Viewed Products
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Featured Video
60W, 19V Power Supply Evaluation Board - NCP1256B60WGEVB
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