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LNK305 PDF预览

LNK305

更新时间: 2024-02-13 02:44:36
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT /
页数 文件大小 规格书
18页 993K
描述
Lowest Component Count, Energy-Efficient Off-Line Switcher IC

LNK305 技术参数

生命周期:ActiveReach Compliance Code:compliant
风险等级:5.69模拟集成电路 - 其他类型:SWITCHING REGULATOR
Base Number Matches:1

LNK305 数据手册

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LNK302/304-306  
LinkSwitch-TN Family  
Lowest Component Count, Energy-Efficient  
Off-Line Switcher IC  
Product Highlights  
Cost Effective Linear/Cap Dropper Replacement  
Lowest cost and component count buck converter solution  
Fully integrated auto-restart for short-circuit and open loop  
fault protection – saves external component costs  
LNK302 uses a simplified controller without auto-restart for  
very low system cost  
FB  
BP  
S
D
+
+
Wide Range  
LinkSwitch-TN  
DC  
High-Voltage  
DC Input  
Output  
66 kHz operation with accurate current limit – allows low cost  
off-the-shelf ± mH inductor for up to ±20 mA output current  
Tight tolerances and negligible temperature variation  
High breakdown voltage of 700 V provides excellent input  
surge withstand  
PI-3492-041509  
Figure 1. Typical Buck Converter Application (See Application Examples Section  
for Other Circuit Configurations).  
Frequency jittering dramatically reduces EMI (~±0 dB)  
Minimizes EMI filter cost  
High thermal shutdown temperature (+±31 °C minimum)  
Much Higher Performance Over Discrete Buck and  
Passive Solutions  
Output Current Table1  
230 VAC ±±15  
81-261 VAC  
Supports buck, buck-boost and flyback topologies  
System level thermal overload, output short-circuit and open  
control loop protection  
Excellent line and load regulation even with typical configuration  
High bandwidth provides fast turn-on with no overshoot  
Current limit operation rejects line ripple  
Universal input voltage range (81 VAC to 261 VAC)  
Built-in current limit and hysteretic thermal protection  
Higher efficiency than passive solutions  
Product4  
MDCM2  
CCM3  
MDCM2  
CCM3  
LNK302P/G/D  
LNK304P/G/D  
LNK305P/G/D  
LNK306P/G/D  
63 mA  
±20 mA  
±71 mA  
221 mA  
80 mA  
63 mA  
±20 mA  
±71 mA  
221 mA  
80 mA  
±70 mA  
280 mA  
360 mA  
±70 mA  
280 mA  
360 mA  
Table 1. Output Current Table.  
Notes:  
Higher power factor than capacitor-fed solutions  
Entirely manufacturable in SMD  
±. Typical output current in a non-isolated buck converter. Output power capability  
depends on respective output voltage. See Key Applications Considerations  
Section for complete description of assumptions, including fully discontinuous  
conduction mode (DCM) operation.  
EcoSmart – Extremely Energy Efficient  
2. Mostly discontinuous conduction mode.  
Consumes typically only 10/80 mW in self-powered buck  
topology at ±±1/230 VAC input with no-load (opto feedback)  
Consumes typically only 7/±2 mW in flyback topology with  
external bias at ±±1/230 VAC input with no-load  
Meets California Energy Commission (CEC), Energy Star, and  
EU requirements  
3. Continuous conduction mode.  
4. Packages: P: DIP-8B, G: SMD-8B, D: SO-8C.  
Applications  
Appliances and timers  
LED drivers and industrial controls  
and thermal shutdown circuitry onto a monolithic IC. The start-up  
and operating power are derived directly from the voltage on the  
DRAIN pin, eliminating the need for a bias supply and associated  
circuitry in buck or flyback converters. The fully integrated  
auto-restart circuit in the LNK304-306 safely limits output power  
during fault conditions such as short-circuit or open loop,  
reducing component count and system-level load protection  
cost. A local supply provided by the IC allows use of a non-  
safety graded optocoupler acting as a level shifter to further  
enhance line and load regulation performance in buck and  
buck-boost converters, if required.  
Description  
LinkSwitch-TN is specifically designed to replace all linear and  
capacitor-fed (cap dropper) non-isolated power supplies in the  
under 360 mA output current range at equal system cost while  
offering much higher performance and energy efficiency.  
LinkSwitch-TN devices integrate a 700 V power MOSFET,  
oscillator, simple On/Off control scheme, a high-voltage switched  
current source, frequency jittering, cycle-by-cycle current limit  
www.powerint.com  
June 2013  
This Product is Covered by Patents and/or Pending Patent Applications.  

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