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LNK454D

更新时间: 2022-12-23 04:41:00
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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
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12页 1023K
描述
LED Driver IC with TRIAC Dimming, Single-Stage PFC and Constant Current Control for Non-Isolated Applications

LNK454D 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  
Single stage power factor correction and accurate constant  
current (CC) output  
Flicker-free phase-controlled TRIAC dimming  
Very low component count with small non-electrolytic bulk  
capacitor, for compact replacement lamp designs  
Compact SO8 package  
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  
725 V integrated MOSFET allows small bulk capacitance and  
maximizes power capability  
Latching shutdown protection for short-circuit / open feedback  
and output overvoltage  
Auto-restart for overload condition  
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  
Power1  
1.5 W  
3 W  
4 W  
6 W  
Power1  
3 W  
6 W  
8 W  
11.5 W  
16 W  
LNK454D  
LNK456D  
LNK457D/V  
LNK458V  
LNK460V  
EcoSmart® - Energy Efficient  
High power factor optimizes system lumen per watt by  
reducing input VA  
8 W  
Table 1. Output Power Table.  
Control algorithm balances switching and conduction losses  
over line and load to maintain optimum efficiency  
Cycle skipping regulation for abnormally low output power to  
clamp peak output current delivered  
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).  
2. Packages: D: SO-8C, V: eDIP-12.  
Description  
Output Current  
Number of  
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.  
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 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  
June 2010  
PRELIMINARY  
This document contains information on a new product. Specifications and information herein  
are subject to change without notice.  

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