PT4209 Datasheet | PowTech

DESCRIPTION The PT4209 is a flicker-free PWM/analog dimmable, primary side constant current controller which can achieve high power factor in a single stage converter, targeted to applications in solid state lighting. It is designed for the flyback topology, and regulates output current accurately without the secondary feedback loop. PT4209 works in quasi-resonant mode to reduce the MOSFET switching loss. The device uses extremely low startup and low quiescent current to achieve high efficiency. A plete set of integrated protection functions allows the PT4209 to protect against all fault conditions such as VCC under-voltage, VCC over-voltage, cycle by cycle current limit, output open/short circuit, Rcs open circuit, transformer winding short circuit and over temperature shut down. The PT4209 is available in SOP8 package. FEATURES - - - - - - - - - - - - - Constant Current Control Without Secondary Feed back Flicker-free PWM/analog Dimming (10%-100%) Accurate Constant Current Output Quasi-Resonant Mode Operation Ultra-low（10u A）Start Up Current Low Quiescent Current (1m A) VCC Under Voltage Protection Over Voltage Protection by Voltage Holding Cycle by Cycle Current Limit Rcs Open Circuit Protection Transformer Winding Short Circuit Protection Output Open/Short Circuit Protection Over Temperature Protection APPLICATIONS - - - Solid State Lighting Industrial and mercial Lighting Residential Lighting ORDERING INFORMATION PACKAGE SOP-8 TEMPERATURE RANGE -40℃ to 85℃ ORDERING PART NUMBER PT4209ESOH TRANSPORT MEDIA 3000/Tape and Reel MARKING PT4209 xxxxx X TYPICAL APPLICATION CIRCUIT D3 AC 85~264V C1 Rst R11 D1 R2 C2 R12 R3 C3 R4 D2 C4 R6 VCC VINS P GND DET DIM DRV CS Rcs China Resources Powtech (shanghai) Co. Ltd PT4209_DS Rev...