OB3340

OB3340 High PF, High CC Buck Topology LED driver Product Specification GENERAL DESCRIPTION The OB3340 is a high power factor and high constant current precision LED driver for LED lighting applications. An analog multiplier for power factor correction (PFC), zero current detector (ZCD) to ensure TM operation and a feedback circuit to achieve constant LED current, a current sensing comparator with built-in leadingedge blanking ensures safe operation during short-circuit at the output, and a totem pole output ideally suited for driving a power MOSFET. OB3340 provides comprehensive protection features including system VCC under voltage lockout (UVLO), Output short\open protection, Cycle by cycle current limiting, and gate drive output clamping for external power MOSFET protection. FEATURES  High Precision Constant Output Current  Analog multiplier for High Power Factor Correction  Low Start-up Current and Operating Current  Internal Startup Timer for Stand-alone Applications  Transition Mode (TM) Operation  Internal Leading Edge Blanking  Cycle-by-Cycle Current Limiting  Totem Pole Output with High State Clamping  Under Voltage Lockout with Hysteresis  VCC over voltage protection  Output short/open protection  Audio Noise Free  11V to 32V wide range of VCC voltage APPLICATIONS  LED Lighting Power TYPICAL APPLICATION On-Bright Confidential to ... ©On-Bright Electronics Confidential -1- Preliminary Datasheet OB_DOC_DS_334000 GENERAL INFORMATION Terminal Assig...