LinkSwitch-PL

Single Stage PFC with CC Output, TRIAC-dimmable LED Driver IC for Non-Isolated Applications

This is an active product that is not recommended for new designs.
Figure 1. Basic Application Schematic.

Data Sheets

Product Details

Description

Designed for compact LED replacement lamps, LinkSwitch-PL enables very small and low cost TRIAC dimmable, single-stage, power factor corrected, constant current drivers for solid state lighting. LinkSwitch-PL is optimized for direct LED current sensing, operates over a wide input voltage range and delivers output power up to 16 W. Its innovative 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 jittering, cycle-by-cycle current limit and hysteretic thermal shutdown in a monolithic IC.

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
  • Completely eliminates control loop compensation

Advanced Performance Features

  • Optimized for non-isolated flyback designs
  • Fast start-up time
  • 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 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-Efficiency Technology

  • High power factor optimizes system lumens per input VA
  • Control algorithm balances switching and conduction losses over line and load to maintain optimum efficiency

Green Package

  • Halogen free and RoHS compliant package

Applications

Power Table

Output Power Table
Product1 85-265 VAC
Minimum
Output Power
Maximum
Output Power2
LNK454D 1.5 W 3 W
LNK456D 3 W 6 W
LNK457D/K/V 4 W 8 W
LNK458K/V 6 W 11.5 W
LNK460K/V 8 W 16 W

Notes:

  1. Packages: D: SO-8C, K: eSOP-12, V: eDIP-12.
  2. Maximum practical continuous power in an open frame design with adequate heat sinking, measured at +50 °C ambient.

Product Documents

Design Examples

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