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LNK457DG-TL

Description
led lighting drivers led drvrtriac dim 8 W (85-265 vac)
Categorysemiconductor    Other integrated circuit (IC)   
File Size2MB,20 Pages
ManufacturerPower Innovations Limited
Websitehttp://www.power-innovations.com
Environmental Compliance  
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LNK457DG-TL Overview

led lighting drivers led drvrtriac dim 8 W (85-265 vac)

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
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
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
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
Figure 1.
AC
IN
D
LinkSwitch-PL
CONTROL
BP
S
FB
PI-5835-060710
Basic Application Schematic.
Output Power Table
Product
2
LNK454D
LNK456D
LNK457D/K/V
LNK458K/V
LNK460K/V
85-265 VAC
Minimum Output
Maximum Output
Power
Power
1
1.5 W
3W
3W
6W
4W
8W
6W
11.5 W
8W
16 W
Description
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.
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.
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).
2. Packages: D: SO-8C, K: eSOP-12, V: eDIP-12.
Output Current
Number of
Serial LEDs
1
2
3
4
5
6
7
8
9
10
11
12
Figure 2.
350 mA
LNK454
LNK454
LNK456
LNK456
LNK457
LNK457
LNK458
LNK458
LNK458
LNK460
LNK460
LNK460
500 mA
LNK454
LNK456
LNK456
LNK457
LNK458
LNK458
LNK460
LNK460
LNK460
700 mA
LNK454
LNK456
LNK457
LNK458
LNK460
LNK460
1000 mA
LNK456
LNK457
LNK458
LNK460
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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Description led lighting drivers led drvrtriac dim 8 W (85-265 vac) led lighting drivers led drvrtriac dim 8 W (85-265 vac) led lighting drivers led drvrtriac dim 8 W (85-265 vac) led lighting drivers 869-lnk460vg 16 W (85-265 vac)
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