NCP1252: PWM Controller, Current Mode, for Forward and Flyback Applications

The NCP1252 controller offers everything needed to build cost effective and reliable ac-dc switching supplies dedicated to ATX power supplies or any forward application. Thanks to the use of an internally fixed timer, NCP1252 detects an output overload without relying on the auxiliary Vcc. A Brown-Out input offers protection against low input voltages and improves the converter safety. Finally, the SOIC-8 package saves PCB space and represents a solution of choice in cost sensitive project.

特性
  • Peak current mode control
  • Adjustable switching frequency
  • Latched primary overcurrent protection with 10 ms fixed delay
  • Adjustable soft start timer
  • Auto recovery brown out detection
  • Internal 160 ns leading edge blanking
  • Frequency jittering
  • Adjustable internal ramp compensation
  • +500 mA / -800 mA Source/Sink current driver capability
  • Skip cycle operation in light/no load operation
  • SOIC-8 package
  • Extended Vcc range up to 28 V with auto recovery UVLO
优势
  • Help to build rugged power supplies
  • High flexibility on the switching frequency
  • Allow temporary over load/current and latch permanent fault
  • Flexibility on the soft start duration
  • Resume the power supply operation after a brown out detection
  • Noise immunity improved
  • Improve the EMI signature by spreading the noise
  • Save external components
  • No need of external power MOSFET driver
  • Save dummy load
  • Save PCB area
应用
  • Power supplies for PC silver boxes
  • Ac-dc adapter converter
  • Game Adapter
  • Flyback and Forward Application
终端产品
  • Desktops
封装
设计和开发工具 (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1252 2-switch forward MathCad worksheetNCP1252_MATHCAD (423.0kB)0
仿真模型 (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1252 Pspice modelNCP1252 SPICE MODEL (134.0kB)0
数据表 (1)
Document TitleDocument ID/SizeRevisionRevision Date
Current Mode PWM Controller for Forward and Flyback ApplicationsNCP1252/D (186kB)7
应用注释 (3)
Document TitleDocument ID/SizeRevisionRevision Date
2 Switch-Forward Current Mode Converter with the NCP1252AND8373/D (1571.0kB)1
NCP1252 Boost and CAT4026 LED Driver BoardAND8478/D (2237.0kB)0
Stability Analysis in Multiple Loop SystemsAND8327/D (213.0kB)0
封装图纸 (2)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
SOIC-8 Narrow Body751-07 (62.6kB)AK
产品订购型号
产品状况Compliance封装MSL*容器预算价格 (1千个数量的单价）
NCP1252ADR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.32
NCP1252APGActivePb-free Halide freePDIP-8626-05NATube50$0.34
NCP1252BDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.32
NCP1252CDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.32
NCP1252DDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.32
NCP1252EDR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.32
订购产品技术参数
ProductTopologyControl Modefsw Typ (kHz)Stand-by ModeUVLO (V)Short Circuit ProtectionLatchSoft StartVCC Max (V)Drive Cap. (mA)
NCP1252ADR2GFlyback ForwardCurrent ModeUp to 500Yes9 to 10YesYesYes28500 / 800
NCP1252APGFlyback ForwardCurrent ModeUp to 500Yes9 to 10YesYesYes28500 / 800
NCP1252BDR2GFlyback ForwardCurrent ModeUp to 500Yes9 to 10YesYesYes28500 / 800
NCP1252CDR2GForward FlybackCurrent ModeUp to 500Yes9 to 10YesYesYes28500 / 800
NCP1252DDR2GForward FlybackCurrent ModeUp to 500Yes9 to 10YesYesYes28500 / 800
NCP1252EDR2GFlyback ForwardCurrent ModeUp to 500Yes9 to 10YesYesYes28500 / 800
Current Mode PWM Controller for Forward and Flyback Applications (186kB) NCP1252
NCP1252 2-switch forward MathCad worksheet NCP1252
NCP1252 Pspice model NCP1252
2 Switch-Forward Current Mode Converter with the NCP1252 NCP1252
NCP1252 Boost and CAT4026 LED Driver Board NCP1252
Stability Analysis in Multiple Loop Systems NCP1055
8 LEAD PDIP NE592
SOIC-8 Narrow Body CM1216
NCP1252
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