NCP1336:Quasi-Resonant Current Mode Controller w/ HV Start-up
The NCP1336 hosts a high-performance circuitry aimed to powering quasi-resonant converters. Capitalizing on a novel 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 occurring 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. The controller takes benefit of a high-voltage start-up current source to provide a quick and lossless power-on sequence. To improve the safety in overload situations, the controller includes an Over Power Protection circuit which clamps the delivered power at high-line. Safety-wise, an adjustable timer relies on the feedback voltage to detect a fault. On version B, this fault triggers a triple-hiccup on the VCC pin which naturally reduces the average input power drawn by the converter. On version A, when a fault is detected, the controller is latched-off. Particularly well suited for adapter applications, the controller features two latch inputs: one dedicated to Over Temperature protection (OTP) which offers an easy means to connect a pull-down temperature sensor like an NTC, and a second one more classical that can be used ot performa an accurate Over voltage Protection. Finally, a brownout pin whcih stops the circuit operation in presence of a low mains condition is included.
技术特性
- Quasi−Resonant Peak Current−Mode Control Operation
- Valley Switching Operation with Valley−Lockout for Noise−Immune
Operation
- Internal 5 ms Soft−Start
- Loss−Free Adjustable Over Power Protection
- Auto−Recovery or Latched Internal Output Short− Circuit Protection
- Adjustable Timer for Improved Short−Circuit Protection
- Overvoltage and Overtemperature Protection Inputs
- Brownout Input
- −500 mA/+800 mA Peak Current Source/Sink Capability
- Internal Temperature Shutdown
- Direct Optocoupler Connection
- 3 s Blanking Delay to Ignore Leakage Ringing at Turn−Off
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终端产品
- Notebook Adapters
- Flat TV SMPS
应用
- High Power Ac-Dc converters
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 |
| NCP1336ADR2G |
Active |
|
Quasi-Resonant Current Mode Controller w/ HV Start-up |
SOIC-14 NB, Less Pin 13 |
751AN |
1 |
Tape and Reel |
2500 |
$0.36 |
| NCP1336BDR2G |
Active |
|
Quasi-Resonant Current Mode Controller w/ HV Start-up |
SOIC-14 NB, Less Pin 13 |
751AN |
1 |
Tape and Reel |
2500 |
$0.36 |
数据资料DataSheet下载
