RT7320 / RT7321 / RT7322 Offline Linear LED Drivers Key Specifications Simple applications with low component count Automatic 2-parallel 2- series mode LED-string switching Programmable current levels in series & parallel modes 16% Higher LED utilization than competitors 500V rated internal devices Application examples: High Power factor > 0.96 (RT7321/22) Thermal fold-back temperature protection Richtek Patented topology Suitable for medium power 6~8W offline applications RT7320 for simple 6.5W application Vin 230V Pin ILED Pout Efficiency Ploss 8.06W 25.8mA 6.7W 83.4% 1.3W RT7321 for 7W high Power Factor application 16% Higher LED utilization compared to competitor solutions More light output at lower cost. Offline Linear LED Driver Product Family Product LED String RT7320 1- series mode RT7321 RT7322 Automatic 2-parallel 2- series mode High Power Factor √ Where to Use Package Suitable for 2-7W app. PSOP-8 Suitable for 6-8W app. PSOP-8(customized current setting), WQFN5x5-20L(adjustable current setting)