NCP1379:Quasi-Resonant Current Mode Controller
The NCP1379 is a high performance device aimed at powering quasi-resonant converters. Capitalizing on a proprietary valley lockout system, the controller shifts gears and reduces the switching frequency as the power loading becomes lighter. This results in a stable operation despite switching events always triggering in the drain-source valley. This system works down to the 4th valley and toggles to a variable frequency mode beyond, ensuring an excellent standby power performance. To improve the safety in the overload situations, the controller includes an Over Power Protection (OPP) circuit which clamps the delivered power at high-line. Safety-wise, a fixed internal timer relies on the feedback voltage to detect a fault. Once the timer elapses, the controller stops and enters auto-recovery mode, ensuring a low duty-cycle burst operation. Particularly well suited for TV power supply applications, the controller features a low startup voltage allowing use of an auxiliary supply to power the device.
技术特性
- Quasi−Resonant Peak Current−Mode Control Operation
- Valley Switching Operation with Valley−Lockout for Noise−Immune
Operation
- Frequency Foldback at Light Load to Improve the Light Load
Efficiency
- Adjustable Over Power Protection
- Auto−Recovery Output Short−Circuit Protection
- Fixed Internal 80 ms Timer for Short−Circuit Protection
- Combined Overvoltage Protection and Brown−out
- +500 mA / −800 mA Peak Current Source/Sink Capability
- Internal Temperature Shutdown
- Direct Optocoupler Connection
- Low VCC(on) Allowing to Use a Standby Power Supply to Power the Device
- Extremely Low No−Load Standby Power
- SO8 Package
- These Devices are Pb−Free and are RoHS Compliant
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终端产品
- Power AC-DC converters for adapters, TVs and set top boxes
应用
- Auxiliary power supplies (flat TV, appliances)
封装图 PACKAGE DIMENSIONS
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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 |
| NCP1379DR2G |
Active |
|
Quasi-Resonant Current Mode Controller |
SOIC-8 |
751-07 |
1 |
Tape and Reel |
2500 |
$0.35 |
数据资料DataSheet下载
