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HF01B02DP 参数 Datasheet PDF下载

HF01B02DP图片预览
型号: HF01B02DP
PDF下载: 下载PDF文件 查看货源
内容描述: [Off Line High Voltage Quasi Resonant Regulator]
分类和应用:
文件页数/大小: 16 页 / 902 K
品牌: MPS [ MONOLITHIC POWER SYSTEMS ]
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HF01B00/01/02/03/04OFF LINE HIGH VOLTAGE QUASI RESONANT REGULATOR  
Leading Edge Blanking (LEB)  
In normal operation, the primary peak current is  
sensed by a shunt resistor between the Source  
pin and Ground. The turn-off threshold of the  
MOSFET is set by FB voltage, Vsense=VFB/3.3.  
When the voltage drop of shunt resistor reaches  
Vsense, the MOSFET turns off.  
During start-up and over-load condition, the  
primary peak current threshold is internally  
limited to 1V even if VFB voltage is larger than  
3.3V to avoid excessive output power and lower  
the voltage rating of the switch.  
In order to avoid turning off the MOSFET by mis-  
trigger spikes shortly after the switch turns on,  
the IC implements a 320ns leading edge blanking.  
During blanking time, any trigger signal on  
source pin is blocked. Figure 11 shows the  
primary current sense waveform and the leading  
edge blanking.  
320ns  
Figure 11Leading Edge Blanking  
HF01B00/01/02/03/04 Rev. 1.2  
4/9/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.  
© 2013 MPS. All Rights Reserved.  
www.MonolithicPower.com  
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