NCP1937: COMBO PFC & QR FLYBACK CONTROLLER
This combination IC integrates power factor correction (PFC) and quasi-resonant flyback functionality necessary to implement a compact and highly efficient Switched Mode Power Supply for an adapter application. The PFC stage exhibits near-unity 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 quasi-resonant current-mode flyback stage features a proprietary valley-lockout 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.
技术特性
- Wide VCC Range from 9 V to 30 V with Built−in Overvoltage Protection
- High−Voltage Startup Circuit and Active Input Filter Capacitor Discharge Circuitry for Reduced Standby Power
- Integrated High−Voltage Brown−Out Detector
- Integrated High−Voltage Switch Disconnects PFC Feedback Resistor
Divider to Reduce Standby Power
- Fault Input for Severe Fault Conditions, NTC Compatible (Latch and Auto−Recovery 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
应用
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终端产品
- All-In-One (AIO) Computers
- High Power Notebook Adapters
封装图 PACKAGE DIMENSIONS
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评估板信息
订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| NCP1937A1DR2G |
Active |
|
COMBO PFC & QR FLYBACK CONTROLLER |
SOIC-20, Less Pins 2, 4, & 19 |
751BS |
1 |
Tape and Reel |
2500 |
$0.6 |
| NCP1937B1DR2G |
Active |
|
COMBO PFC & QR FLYBACK CONTROLLER |
SOIC-20, Less Pins 2, 4, & 19 |
751BS |
1 |
Tape and Reel |
2500 |
$0.6 |
| NCP1937C1DR2G |
Product Preview |
|
COMBO PFC & QR FLYBACK CONTROLLER |
SOIC-20, Less Pins 2, 4, & 19 |
751BS |
1 |
Tape and Reel |
2500 |
|
| NCP1937D1DR2G |
Product Preview |
|
COMBO PFC & QR FLYBACK CONTROLLER |
SOIC-20, Less Pins 2, 4, & 19 |
751BS |
1 |
Tape and Reel |
2500 |
|
数据资料DataSheet下载
