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DI-76 参数 Datasheet PDF下载

DI-76图片预览
型号: DI-76
PDF下载: 下载PDF文件 查看货源
内容描述: 3.1 W¯¯极少的外部元器件电源 [3.1 W Low Parts Count Power Supply]
分类和应用:
文件页数/大小: 2 页 / 286 K
品牌: POWERINT [ Power Integrations ]
 浏览型号DI-76的Datasheet PDF文件第1页  
DI-76  
Output diode D4 needs a sufficient peak inverse voltage  
(PIV) rating for high line withstand, requiring an ultra-  
fast 200 V type (UF4003). For lower output voltages  
(PIV <100 V), Schottky diodes work well and enable  
improved efficiency.  
The LinkSwitch PIXls spreadsheet tool included in  
PI Expert™ Design Software can be used to redesign the  
transformer for different output voltages.  
Key Design Points  
The value of C3 (1 µF) allows time for the output voltage  
to develop at startup.  
A larger R3 value will provide flatter voltage regulation if  
a higher no-load voltage can be tolerated.  
A lower R2 value will reduce the output voltage while  
proportionally increasing the maximum output current.  
20  
18  
TRANSFORMER PARAMETERS  
TDK PC40 EE13,  
Core Material  
16  
14  
12  
ALG = 199 nH/T2  
Bobbin  
EE13 Horizontal 8-pin  
Shield 1: 55 T, #38 AWG,  
1 Layer  
Primary-1: 69 T, #34 AWG,  
2 Layers  
Primary-2: 43 T, #35 AWG,  
1 Layer  
Secondary: 30 T, #30 T.I.W.,  
2 Layers  
10  
MIN  
MAX  
105 VDC  
150 VDC  
315 VDC  
370 VDC  
8
6
Winding Details  
4
2
0
0
100  
200  
300  
400  
Load (mA)  
Shield 1: (3-Float), Primary-1  
(1-4), Primary-2 (4-3),  
Secondary (6-5)  
Winding Order  
(pin numbers)  
Figure 2. Output Regulation vs. Load Current Curves.  
Primary  
Inductance  
2484 µH ±10%  
Primary Resonant  
Frequency  
80  
70  
500 kHz (minimum)  
70 µH (maximum)  
Leakage  
Inductance  
105 VDC  
150 VDC  
315 VDC  
370 VDC  
60  
Table 1. Transformer Design Parameters.  
50  
40  
0
50  
100 150 200 250 300  
Load (mA)  
Figure 3. Efficiency vs. Output Current Curves.  
For the latest updates, visit www.powerint.com  
Power Integrations may make changes to its products at any time. Power Integrations has no liability arising from your use of any information, device or circuit  
described herein nor does it convey any license under its patent rights or the rights of others. POWER INTEGRATIONS MAKES NO WARRANTIES HEREIN AND  
SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATIONS, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A  
PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. The products and applications illustrated herein (including circuits external to the  
products and transformer construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign patent applications  
assigned to Power Integrations. A complete list of Power Integrations' patents may be found at www.powerint.com.  
The PI logo, TOPSwitch, TinySwitch, LinkSwitch and EcoSmart are registered trademarks of Power Integrations. PI Expert and DPA-Switch  
are trademarks of Power Integrations. Copyright 2004, Power Integrations  
Power Integrations  
5245 Hellyer Avenue  
San Jose, California 95138  
MAIN PHONE NUMBER  
+1 408-414-9200  
APPLICATIONS HOTLINE  
+1 408-414-9660  
APPLICATIONS FAX  
+1 408-414-9760  
For a complete listing of worldwide sales offices,  
please visit www.powerint.com  
A
7/04  
www.powerint.com