Description
   The LinkSwitch™-PH dramatically simplifies implementation of LED drivers requiring long lifetime, high efficiency, PF >0.9, and TRIAC dimming capability (LNK403-410). The single-stage combined power factor and constant-current controller eliminates a switching stage and the electrolytic bulk capacitor. The advanced primary-side control used by the LinkSwitch-PH device provides accurate constant current control while eliminating the need for an optocoupler and current sensing circuits.

Product Highlights
Dramatically Simplifies Off-line LED Drivers

• Single-stage combination of power factor correction and

   accurate constant-current (CC) output

   • Enables very long lifetime designs (no electrolytic capacitors)

   • Eliminates optocoupler and all secondary current control

      circuitry

   • Eliminates control loop compensation circuitry

• Simple primary-side PWM dimming interface

• Universal input voltage range

• LNK403-410 optimized for flicker-free TRIAC dimming

EcoSmart™ – Energy Efficient

• Single-stage PFC combined with output CC control

   • Greatly increases efficiency, >90% achievable

   • Reduces component count

   • No current sense resistors

• Low standby power remote ON/OFF feature

   (<50 mW at 230 VAC)

Accurate and Consistent Performance

• Compensates for transformer inductance variations

• Compensates for line input voltage variation

• Frequency jittering greatly reduces EMI filter size and cost

Advanced Protection and Safety Features

• Auto-restart for short-circuit protection

• Open circuit fault detection mode

• Automatic thermal shutdown restart with hysteresis

• Meets high voltage creepage requirement between DRAIN and

   all other signal pins both on PCB and at package

Green Package

• Halogen free and ROHS compliant package

APPLICATIONs

• Off-line LED driver