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NCP1937_V01中文资料安森美半导体数据手册PDF规格书
NCP1937_V01规格书详情
This combination IC integrates power factor correction (PFC) and
quasiïresonant flyback functionality necessary to implement a
compact and highly efficient Switched Mode Power Supply for an
adapter application.
The PFC stage exhibits nearïunity power factor while operating in a
Critical Conduction Mode (CrM) with a maximum frequency clamp.
The circuit incorporates all the features necessary for building a robust
and compact PFC stage while minimizing the number of external
components.
The quasiïresonant currentïmode flyback stage features a
proprietary valleyïlockout circuitry, ensuring stable valley switching.
This system works down to the 4th valley and toggles to a frequency
foldback mode with a minimum frequency clamp beyond the 4th
valley to eliminate audible noise. Skip mode operation allows
excellent efficiency in light load conditions while consuming very low
standby power consumption.
Common General Features
• Wide VCC Range from 9 V to 30 V with Builtïin Overvoltage
Protection
• HighïVoltage Startup Circuit and Active Input Filter Capacitor
Discharge Circuitry for Reduced Standby Power
• Integrated HighïVoltage BrownïOut Detector
• Integrated HighïVoltage Switch Disconnects PFC Feedback Resistor
Divider to Reduce Standby Power
• Fault Input for Severe Fault Conditions, NTC Compatible (Latch and
AutoïRecovery Options)
• 0.5 A / 0.8 A Source / Sink Gate Drivers
• Internal Temperature Shutdown
• Power Savings Mode Reduces Supply Current Consumption to
70 A Enabling Very Low Input Power Applications
PFC Controller Features
• Critical Conduction Mode with Constant On Time Control (Voltage
Mode) and Maximum Frequency Clamp
• Accurate Overvoltage Protection
• BiïLevel LineïDependent Output Voltage
• Fast Line / Load Transient Compensation
• Boost Diode ShortïCircuit Protection
• FeedïForward for Improved Operation across Line and Load
• Adjustable PFC Disable Threshold Based on Output Power
QR Flyback Controller Features
• Valley Switching Operation with Valleyï
Lockout for NoiseïFree Operation
• Frequency Foldback with Minimum Frequency
Clamp for Highest Performance in
Standby Mode
• Minimum Frequency Clamp Eliminates
Audible Noise
• TimerïBased Overload Protection
(Latched or AutoïRecovery options)
• Adjustable Overpower Protection
• Winding and Output Diode ShortïCircuit
Protection
• 4 ms SoftïStart Timer
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ON |
2017+ |
SMD |
12000 |
原厂/代理渠道价格优势 |
询价 | ||
ON/安森美 |
21+ |
SOP17 |
10000 |
全新原装 公司现货 价格优 |
询价 | ||
ON/安森美 |
23+ |
SOP17 |
90000 |
只做原厂渠道价格优势可提供技术支持 |
询价 | ||
onsemi(安森美) |
23+ |
SOIC20150mil |
7350 |
现货供应,当天可交货!免费送样,原厂技术支持!!! |
询价 | ||
ON/安森美 |
24+ |
NA |
860000 |
明嘉莱只做原装正品现货 |
询价 | ||
ON/安森美 |
21+ |
SOP17 |
5000 |
全新原装现货 价格优势 |
询价 | ||
ON/安森美 |
NA |
275000 |
一级代理原装正品,价格优势,长期供应! |
询价 | |||
ON(安森美) |
23+ |
N/A |
589610 |
新到现货 原厂一手货源 价格秒杀代理! |
询价 | ||
ON Semiconductor |
21+ |
20SOIC |
13880 |
公司只售原装,支持实单 |
询价 | ||
ON/安森美 |
2048+ |
SOP |
9851 |
只做原装正品现货!或订货假一赔十! |
询价 |