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LNK520 参数 Datasheet PDF下载

LNK520图片预览
型号: LNK520
PDF下载: 下载PDF文件 查看货源
内容描述: 高效节能, CV或CV / CC切换为非常低的成本适配器和充电器 [Energy Efficient, CV or CV/CC Switcher for Very Low Cost Adapters and Chargers]
分类和应用:
文件页数/大小: 20 页 / 844 K
品牌: POWERINT [ Power Integrations ]
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LNK520  
DRAIN  
0
1
CONTROL  
V
C
INTERNAL  
SUPPLY  
Z
C
SHUTDOWN/  
AUTO-RESTART  
CURRENT  
LIMIT  
ADJUST  
SHUNT REGULATOR/  
ERROR AMPLIFIER  
+
-
÷ 8  
-
5.6 V  
4.7 V  
CURRENT LIMIT  
COMPARATOR  
5.6 V  
+
-
+
I
HYSTERETIC  
THERMAL  
FB  
SHUTDOWN  
OSCILLATOR  
D
MAX  
CLOCK  
SAW  
S
R
Q
-
+
PW  
M
COMPARATOR  
I
DCS  
LEADING  
EDGE  
BLANKING  
LOW  
FREQUENCY  
OPERATION  
R
E
SOURCE  
PI-2777-032503  
Figure 2. Block Diagram.  
Pin Functional Description  
LNK520  
DRAIN (D) Pin:  
S
S
C
S
1
2
8
7
Power MOSFETdrain connection. Provides internal operating  
current for start-up. Internal current limit sense point for drain  
current.  
S
S
3
4
CONTROL (C) Pin:  
5
D
Error amplifier and feedback current input pin for duty cycle  
and current limit control. Internal shunt regulator connection  
to provide internal bias current during normal operation. It is  
also used as the connection point for the supply bypass and  
auto-restart/compensation capacitor.  
P Package (DIP-8B)  
G Package (SMD-8B)  
PI-3790-121503  
Figure 3. Pin Configuration.  
SOURCE (S) Pin:  
Output MOSFET source connection for high voltage power  
return. Primary side control circuit common and reference  
point.  
E
2/05  
2