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LNK614DG-TL 参数 Datasheet PDF下载

LNK614DG-TL图片预览
型号: LNK614DG-TL
PDF下载: 下载PDF文件 查看货源
内容描述: 节能高效,准确的CV / CC切换为适配器和充电器 [Energy-Efficient, Accurate CV/CC Switcher for Adapters and Chargers]
分类和应用: 光电二极管
文件页数/大小: 18 页 / 883 K
品牌: POWERINT [ Power Integrations ]
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LNK603-606/613-616  
An overshoot  
is acceptable  
Negative ring may  
increase output  
ripple and/or  
degrade output  
regulation  
Figure 6. Desired Drain Voltage Waveform with Minimal Leakage  
Ringing Undershoot.  
Figure 7.  
Undesirable Drain Voltage Waveform with Large Leakage  
Ring Undershoot.  
L1  
1 mH  
TI  
EE13  
5
10  
8
D7  
SL13  
C3  
R2  
470 k  
820 pF  
3
1 kV  
D1  
D2  
C7  
470 µF  
10 V  
1N4007 1N4007  
DC  
Output  
1 kΩ  
R3  
300 Ω  
RF1  
8.2 Ω  
2 W  
2
4
C1  
4.7 µF  
400 V  
C2  
4.7 µF  
400 V  
AC  
Input  
D5  
1N4007  
NC  
LinkSwitch-II  
R5  
U1  
13 kΩ  
LNK613DG  
1%  
D
D3  
D4  
FB  
1N4007 1N4007  
BP  
S
R6  
9.31 kΩ  
1%  
C4  
1 µF  
50 V  
PI-5116-050808  
Figure 8. LinkSwitch-II Flyback Power Supply Without Bias Supply.  
former saturation and excessive leading edge current spikes.  
LinkSwitch-II has a leading edge blanking time of 170 ns to  
prevent premature termination of the ON-cycle.  
BYPASS pin voltage. The parameters IS2 and VBP are provided in  
the parameter table of the LinkSwitch-II data sheet. Diode D6 can  
be any low cost diode such as FR102, 1N4148 or BAV19/20/21.  
3. Thermal check – At maximum output power, both minimum  
and maximum input voltage and maximum ambient tempera-  
ture; verify that temperature specifications are not exceeded  
for LinkSwitch-II, transformer, output diodes and output  
capacitors. Enough thermal margin should be allowed for  
part-to-part variation of the RDS(ON) of LinkSwitch-II, as specified  
in the data sheet. To assure 10% CC tolerance a maximum  
SOURCE pin temperature of 90 ºC is recommended.  
Quick Design Checklist  
As with any power supply design, all LinkSwitch-II designs  
should be verified on the bench to make sure that component  
specifications are not exceeded under worst-case conditions.  
The following minimum set of tests is strongly recommended:  
1. Maximum drain voltage – Verify that peak VDS does not exceed  
680 V at the highest input voltage and maximum output power.  
2. Maximum drain current – At maximum ambient temperature,  
maximum input voltage and maximum output load, verify  
drain current waveforms at start-up for any signs of trans-  
Design Tools  
Up-to-date information on design tools can be found at the  
Power Integrations web site: www.powerint.com  
7
www.powerint.com  
Rev. F 01/10  
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