The CL88020 LED Driver Integrated Circuit (IC) is an off-line sequential linear LED driver designed to provide 8.5W of LED power from a 120 V_AC nominal input voltage. CL88020 is designed to drive a long string of inexpensive, low-current LEDs directly from the AC mains. A basic driver circuit consists of Microchip Technology Inc.’s CL88020 LED driver IC, six resistors and a bridge rectifier. Two to four additional components are optional for various levels of transient protection, also with a low-cost NTC to assure remote over-temperature protection (OTP). No capacitors, EMI filters, or power factor correction circuits are needed unless the optional reduced light output ripple feature is desired.

• Optimized for 120 V_AC Nominal Input Voltage
  • 120 VAC ± 15% input voltage
• Targeted for 8.5W Output Power
• Programmable Overtemperature Protection
  • Provides Gradual Reduction in Light Output with Increasing Temperature
• Active Line Regulation
  • Provides Fairly Constant Output Power over Variations in AC Line Voltage
  • Typical Line Regulation of –12% to +0%
• Four Taps with Two Current Set Resistors
  • Allows Optimization of THD
• Optional Reduced Light Output Ripple
  • Provides Continuous Power to the LED
  • Eliminates Strobing
  • Uses an External Ceramic Storage Capacitor
• TRIAC Dimmer Compatible
• Available in a Thermally Enhanced 8-Lead SOIC Package with Heat Slug
  • Larger Creepage Distances between HighVoltage and Low Voltage Pins