PT4225

PT4225 1-5W Primary Side CC Regulator GENERAL DESCRIPTION The PT4225 is primary side constant current regulator, which is designed for high performance and cost-effective LED lighting applications. With Powtech’s proprietary constant current compensation technique accurate output current regulation is achieved without the need of a secondary feedback circuitry. Integrated primary inductance compensation circuitry provides accurate constant current operation despite variations in primary inductance. Excellent EMI performance is achieved with frequency jittering function together with soft driving control at totem pole gate drive output. The device integrates a high voltage power switch, an oscillator, a current sense circuit, CC control circuit. It also features a complete set of integrated protection functions to protect against all fault conditions including output open/short circuit, line under-voltage, and over temperature shut down. The PT4225 is available in an SOP-7 package. FEATURES          CC Without Secondary Feedback Integrates 600V Power Switch Inductance Compensation Low Startup Current (<10µA) Adjustable Primary Side Current limit VCC/FB Over Voltage Protection VCC/FB UVLO Feedback Loop Open Circuit Protection Over Temperature Protection APPLICATIONS  Sub 5W LED lighting applications ORDERING INFORMATION PACKAGE SOP-7，Pb free TEMPERATURE RANGE -40℃ to 85℃ ORDERING PART NUMBER PT4225ESOG TRANSPORT MEDIA 2500/Tape and Reel MARKING PT4225 xxxxxX N...