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LNK457V

更新时间: 2022-04-03 17:25:35
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帕沃英蒂格盛 - POWERINT 驱动器三端双向交流开关功率因数校正
页数 文件大小 规格书
20页 2510K
描述
LED Driver IC with TRIAC Dimming Single Stage PFC and Constant Current Control for Non Isolated Applications

LNK457V 数据手册

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LNK454/456-458/460  
LinkSwitch-PL Family  
LED Driver IC with TRIAC Dimming, Single-Stage PFC and  
Constant Current Control for Non-Isolated Applications  
Product Highlights  
Dramatically Simplifies Off-line LED Drivers  
•ꢀ Flicker-free phase-controlled TRIAC dimming  
•ꢀ Single-stage power factor correction and accurate constant  
current (CC) output  
•ꢀ Very low component count with small non-electrolytic bulk  
capacitor for compact replacement lamp designs  
•ꢀ Compact SO8, eSOP, and eDIP packages  
•ꢀ Completely eliminates control loop compensation  
AC  
IN  
LinkSwitch-PL  
D
S
CONTROL  
BP  
FB  
Advanced Performance Features  
•ꢀ Optimized for non-isolated flyback designs  
•ꢀ Frequency jitter greatly reduces EMI filter size and costs  
•ꢀ Low dissipation direct sensing of LED current  
PI-5835-060710  
Advanced Protection and Safety Features  
•ꢀ Cycle skipping regulation for abnormally low output power to  
clamp peak output current delivered  
•ꢀ 725 V integrated power MOSFET allows small bulk capacitance  
and maximizes power capability  
•ꢀ Short-circuit, overload, open feedback and output overvoltage  
protection  
•ꢀ Hysteretic thermal shutdown  
•ꢀ Meets high-voltage creepage between DRAIN and all other pins  
both on PCB and at package  
Figure 1. Basic Application Schematic.  
Output Power Table  
Product2  
85-265 VAC  
Minimum Output  
Maximum Output  
Power  
1.5 W  
3 W  
Power1  
3 W  
6 W  
8 W  
11.5 W  
16 W  
LNK454D  
LNK456D  
LNK457D/K/V  
LNK458K/V  
LNK460K/V  
4 W  
6 W  
8 W  
EcoSmart- Energy Efficient  
•ꢀ High power factor optimizes system lumen per input VA  
•ꢀ Control algorithm balances switching and conduction losses  
over line and load to maintain optimum efficiency  
Table 1. Output Power Table.  
Notes:  
1. Maximum practical continuous power in an open frame design with adequate  
heat sinking, measured at +50 °C ambient (see Key Applications Considerations  
for more information).  
Description  
2. Packages: D: SO-8C, K: eSOP-12, V: eDIP-12.  
The LinkSwitch-PL family enables a very small and low cost  
single-stage power factor corrected constant current driver for  
solid state lighting. Optimized for direct LED current sensing, the  
LinkSwitch-PL operates over a wide input voltage range delivering  
an output power of up to 16 W. The LinkSwitch-PL control  
algorithm provides flicker-free TRIAC dimming with minimal  
external components.  
Output Current  
Number of  
350 mA  
500 mA  
700 mA  
1000 mA  
Serial LEDs  
1
2
3
4
5
6
7
8
9
LNK454  
LNK454  
LNK456  
LNK456  
LNK457  
LNK457  
LNK458  
LNK458  
LNK458  
LNK460  
LNK460  
LNK460  
LNK454  
LNK456  
LNK456  
LNK457  
LNK458  
LNK458  
LNK460  
LNK460  
LNK460  
LNK454  
LNK456  
LNK457  
LNK458  
LNK460  
LNK460  
LNK456  
LNK457  
LNK458  
LNK460  
Each device incorporates a 725 V rated power MOSFET, a novel  
discontinuous mode variable frequency variable on-time controller,  
frequency jitter, cycle-by-cycle current limit and hysteretic thermal  
shutdown in a monolithic 4-pin IC, available in SO-8C, eSOP-12,  
and eDIP-12 packages.  
10  
11  
12  
Figure 2. Device Selection Based on Length of Output LED Series String and  
Current. A Typical Voltage Drop of 3.5 V per LED is Assumed.  
www.powerint.com  
October 2011  

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