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DER-60 参数 Datasheet PDF下载

DER-60图片预览
型号: DER-60
PDF下载: 下载PDF文件 查看货源
内容描述: 8.75 W电源采用TNY268P [8.75 W Power Supply using TNY268P]
分类和应用:
文件页数/大小: 25 页 / 626 K
品牌: POWERINT [ Power Integrations ]
 浏览型号DER-60的Datasheet PDF文件第3页浏览型号DER-60的Datasheet PDF文件第4页浏览型号DER-60的Datasheet PDF文件第5页浏览型号DER-60的Datasheet PDF文件第6页浏览型号DER-60的Datasheet PDF文件第8页浏览型号DER-60的Datasheet PDF文件第9页浏览型号DER-60的Datasheet PDF文件第10页浏览型号DER-60的Datasheet PDF文件第11页  
DER-60  
Adapter – TNY268  
May 27, 2005  
4.5 OTP, OVP and LPS Protection Circuit  
Q1, Q3, R11 and R21 from a SCR to pull BP pin act as a latch circuit. R8 is a thermal  
resistor of a NTC type. R8 and R9 from an OTP’s trigger circuit of the SCR. The SCR  
will be triggered when temperature raise to OTP setting point.  
D21, R27, R44, U23 and R1 form an OVP trigger circuit of the SCR. When output  
voltage raise to let D21 conducted, it will trigger the SCR for protection.  
R33, C36, D24 and R36 form a LPS trigger circuit of the SCR. R33 and C36 set at about  
300ms delay time for peak 4A output current testing. (The peak current testing is  
4A/200ms/ 1A/us and 0.25A/ 1800ms/ 1A/us, and then the output voltage can’t be less  
than 3V.) If the output load is increased, the bias voltage will be increased too. When  
the bias voltage increased to LPS setting point, it will let D24 conducted to trigger the  
SCR for protection.  
Power Integrations  
Tel: +1 408 414 9200 Fax: +1 408 414 9201  
Page 7 of 25  
www.powerint.com