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LNK563DG 参数 Datasheet PDF下载

LNK563DG图片预览
型号: LNK563DG
PDF下载: 下载PDF文件 查看货源
内容描述: [IC OFFLINE SWIT OTP HV 8SOP]
分类和应用: 开关光电二极管
文件页数/大小: 16 页 / 1013 K
品牌: POWERINT [ Power Integrations ]
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LNK562-564  
BYPASS  
(BP)  
DRAIN  
(D)  
REGULATOR  
5.8 V  
AUTO-RESTART  
COUNTER  
BYPASS PIN  
UNDER-VOLTAGE  
FAULT  
PRESENT  
0.8 V  
+
-
RESET  
+
5.8 V  
4.85 V  
CURRENT LIMIT  
COMPARATOR  
6.3 V  
+
-
V
ILIMIT  
JITTER  
CLOCK  
DCMAX  
ADJ  
THERMAL  
SHUTDOWN  
OSCILLATOR  
FEEDBACK  
(FB)  
1.69 V -VTH  
S
R
Q
Q
OPEN LOOP  
PULLDOWN  
LEADING  
EDGE  
BLANKING  
PI-3958-092905  
SOURCE  
(S)  
Figure 2. Functional Block Diagram.  
Pin Functional Description  
DRAIN (D) Pin:  
The power MOSFET drain connection provides internal  
operating current for both startup and steady-state operation.  
P Package (DIP-8B)  
G Package (SMD-8B)  
D Package (SO-8C)  
BYPASS (BP) Pin:  
A0.1 μF external bypass capacitor for the internally generated  
5.8 V supply is connected to this pin.  
S
S
BP  
S
S
S
S
1
2
8
7
1
2
8
7
FB  
BP  
FB  
3
4
6
5
S
S
FEEDBACK (FB) Pin:  
D
5
4
D
During normal operation, switching of the power MOSFET is  
controlled by this pin. MOSFET switching is disabled when a  
current greater than 70 μA ows into this pin.  
PI-4547-011107  
SOURCE (S) Pin:  
This pin is the power MOSFET source connection. It is also the  
ground reference for the BYPASS and FEEDBACK pins.  
Figure 3. Pin Conguration.  
protection, frequencyjittering, currentlimitcircuit, andleading  
edge blanking.  
LinkSwitch-LP Functional  
Description  
LinkSwitch-LPcomprisesa700VpowerMOSFETswitchwith  
a power supply controller on the same die. Unlike conventional  
PWM (pulse width modulation) controllers, it uses a simple  
ON/OFF control to regulate the output voltage. The controller  
consists of an oscillator, feedback (sense and logic) circuit, 5.8  
Vregulator,BYPASSpinundervoltagecircuit,over-temperature  
Oscillator  
The typical oscillator frequency is internally set to an average  
of 66/83/100 kHz for the LNK562, 563 & 564 respectively.  
Two signals are generated from the oscillator: the maximum  
duty cycle signal (DCMAX) and the clock signal that indicates  
the beginning of each switching cycle.  
2
Rev. H 11/08