NCP1217: PWM Controller, Fixed Frequency, Current Mode

Housed in a SOIC-7 or PDIP-7 package, the NCP1217 represents the second generation of NCP1203-based controllers. Thanks to its high drive capability, NCP1217 drives large gate-charge MOSFETs, which together with internal ramp compensation and built-in over voltage protection, ease the design of modern AC/DC adapters. NCP1217 offers a true alternative to UC384X-based designs.With an internal structure operating at different fixed frequencies (65, 100, 133kHz), the controller features a high-voltage start-up FET, which ensures a clean and loss less startup sequence. Its current-mode control topology provides an excellent input audio-susceptibility and inherent pulse-by-pulse control. Internal ramp compensation easily prevents subharmonic oscillations from taking place in continuous conduction mode designs.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 a user adjustable low peak current, no acoustic noise takes place.The NCP1217 features two efficient protective circuitries: 1) in presence of an over-current condition, the output pulses are disabled and the device enters a safe burst mode, trying to re-start. Once the default has gone, the device auto-recovers. 2) if an external signal (e.g. a temperature sensor) pulls pin1 above 3.2V, output pulses are immediately stopped and the NCP1217 stays latched in this position. Reset occurs when the VCC collapses to ground, e.g. the user un-plugs the power supply.

特性
  • Current-Mode with adjustable skip-cycle capability
  • Built-in internal ramp compensation
  • Auto-recovery internal output short-circuit protection
  • Full latch-off if Adjustment pin is brought high
  • Extremely low no-load standby power
  • Internal temperature shutdown
  • 500mA peak current capability
  • Fixed frequency versions at 65kHz, 100kHz and 133kHz
  • Direct optocoupler connection
  • Internal Leading Edge Blanking
  • SPICE models available for TRANsient and AC analysis
  • Internal 1ms Soft start (A version only)
  • Limited Duty Cycle to 50% (A version only)
  • Pb-Free Packages are Available
应用
  • High power AC/DC converters for TVs, set-top boxes etc
  • Offline adapters for notebooks
  • Telecom DC-DC converters
  • All power supplies
封装
设计和开发工具 (1)
Document TitleDocument ID/SizeRevisionRevision Date
Flyback Current Mode Loop Compensation Design WorksheetFLYBACK DWS.XLS.ZIP (3516kB)10Dec, 2014
仿真模型 (2)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1217 TRANsient and AC model for Intusoft IsSpice with a Typical Application ExampleNCP1217 ISSPICE TEMPLATES.ZIP (110.0kB)0
NCP1217 TRANsient and AC model for ORCAD PSPICE with a Typical Application ExampleNCP1217 ORCAD TEMPLATES.ZIP (33.0kB)0
数据表 (1)
Document TitleDocument ID/SizeRevisionRevision Date
PWM Controller, Fixed Frequency, Current ModeNCP1217/D (299kB)9Apr, 2015
应用注释 (5)
Document TitleDocument ID/SizeRevisionRevision Date
A 70 W Low Standby Power Supply w/NCP120x SeriesAND8076/D (178.0kB)2
Conducted EMI Filter Design for the NCP1200AND8032/D (534.0kB)2
Offline Buck Converter with Tapped Inductor Improves PerformanceAND8318/D (100.0kB)1
Stability Analysis in Multiple Loop SystemsAND8327/D (213.0kB)0
Wide Mains, 19V, 8A Power Supply Including Power Factor CorrectionAND8292/D (300.0kB)0
封装图纸 (2)
Document TitleDocument ID/SizeRevision
PDIP-7 (PDIP-8 LESS PIN 7)626B (34.7kB)D
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)
NCP1217D100R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.35
NCP1217D133R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.4667
NCP1217D65R2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.35
NCP1217P100GActivePb-free Halide freePDIP-8626BNATube50$0.35
NCP1217P133GActivePb-free Halide freePDIP-8626BNATube50$0.35
NCP1217P65GActivePb-free Halide freePDIP-8626BNATube50$0.35
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)
NCP1217D100R2GFlybackCurrent Mode100YesYesYesYesNo16500
NCP1217D133R2GFlybackCurrent Mode133YesYesYesYesNo16500
NCP1217D65R2GFlybackCurrent Mode65YesYesYesYesNo16500
NCP1217P100GFlybackCurrent Mode100YesYesYesYesNo16500
NCP1217P133GFlybackCurrent Mode133YesYesYesYesNo16500
NCP1217P65GFlybackCurrent Mode65YesYesYesYesNo16500
PWM Controller, Fixed Frequency, Current Mode (299kB) NCP1217A
Flyback Current Mode Loop Compensation Design Worksheet NCP1129
NCP1217 TRANsient and AC model for Intusoft IsSpice with a Typical Application Example NCP1217A
NCP1217 TRANsient and AC model for ORCAD PSPICE with a Typical Application Example NCP1217A
A 70 W Low Standby Power Supply w/NCP120x Series MUR160
Conducted EMI Filter Design for the NCP1200 MBRS360P
Offline Buck Converter with Tapped Inductor Improves Performance NCP1055
Stability Analysis in Multiple Loop Systems NCP1055
Wide Mains, 19V, 8A Power Supply Including Power Factor Correction NCP1605
SOIC-8 Narrow Body CM1216
PDIP-7 (PDIP-8 LESS PIN 7) NCP1129
NCP1217A