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LNK585DG 参数 Datasheet PDF下载

LNK585DG图片预览
型号: LNK585DG
PDF下载: 下载PDF文件 查看货源
内容描述: 零待机功耗的集成离线式开关 [Zero Standby Consumption Integrated Off-Line Switcher]
分类和应用: 开关
文件页数/大小: 16 页 / 1552 K
品牌: POWERINT [ Power Integrations ]
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LNK584-586  
BYPASS/  
DRAIN  
(D)  
MULTI FUNCTION  
(BP/M)  
REGULATOR  
5.85 V  
OVERVOLTAGE  
PROTECTION  
+
-
PU  
+
+
BYPASS PIN  
UNDERVOLTAGE  
GENERATOR  
FEEDBACK REF  
1.70 V  
3 V  
6.5 V  
5.85 V  
4.85 V  
+
OPEN LOOP  
PULL UP  
FAULT  
CURRENT LIMIT  
FEEDBACK  
(FB)  
AUTO-RESTART  
COUNTER  
+
RESET JITTER  
+
-
VILIMIT  
0.9 V  
S
R
Q
Q
CLOCK  
DCMAX  
ADJ  
CC CUT BACK  
1.70 V - 0.9 V  
OSCILLATOR  
SYSTEM  
POWER  
DOWN  
LEADING  
POWER  
DOWN  
COUNTER  
160 fOSC  
CYCLES  
EDGE  
BLANKING  
PU  
RESET  
PI-5912-110910  
SOURCE  
(S)  
Figure 2. Functional Block Diagram.  
Pin Functional Description  
DRAIN (D) Pin:  
The power MOSFET drain connection provides internal  
operating current for both start-up, steady-state and Power-  
Down mode operation.  
G Package (SMD-8C)  
D Package (SO-8C)  
8
7
6
5
1
2
BP/M  
FB  
1
2
8
7
S
S
BP/M  
FB  
S
S
BYPASS/MULTI-FUNCTIONAL (BP/M) Pin:  
An external bypass capacitor, 0.1 mF or greater for the internally  
generated 5.85 V supply is connected to this pin. The minimum  
value of capacitor is 0.1 mF for internal circuit operation. Higher  
values may be required to enter Power-Down mode (see  
LinkZero-AX Power-Down (PD) Mode Design Considerations).  
An overvoltage protection disables MOSFET switching if the  
current into the pin exceeds 6.5 mA (ISD).  
S
S
6
5
S
S
4
D
4
D
3a  
3b  
PI-5910-090810  
FEEDBACK (FB) Pin:  
Figure 3. Pin Configuration.  
During normal operation, switching of the power MOSFET is  
controlled by this pin. MOSFET switching is disabled when a  
voltage greater than an internal VFB reference voltage is applied  
to this pin. The VFB reference voltage is internally set to 1.70 V.  
LinkZero-AX goes into auto-restart mode when the FEEDBACK  
pin voltage has come down to 0.9 V.  
SOURCE (S) Pin:  
This pin is the power MOSFET source connection. It is also the  
ground reference for the BYPASS and FEEDBACK pins.  
2
Rev. B 05/11  
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