LED DRVR 12-Pin ESOP

The LNK457KG 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 LNK457KG operates over a wide input voltage range delivering an output power 8 W. The LNK457KG 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 eSOP-12 packages.

• 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 eSOP packages
  • Completely eliminates control loop compensation
• Advanced Performance Features
  • Optimized for non-isolated fly back 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
• Maximum Output Power : 8 W