PT4227 Datasheet | PowTech

DESCRIPTION The PT4227 is primary side constant current regulator, which is designed for high performance and cost-effective LED lighting applications. With Powtech’s proprietary constant current pensation technique accurate output current regulation is achieved without the need of a secondary feedback circuitry. Integrated primary inductance pensation 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 plete 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 PT4227 is available in an DIP-8L package. FEATURES - - - - - - - - - CC Without Secondary Feedback Integrates 600V Power Switch Inductance pensation Low Startup Current (<10u A) Adjustable Primary Side Current limit VCC/FB Over Voltage Protection VCC/FB UVLO Feedback Loop Open Circuit Protection Over Temperature Protection APPLICATIONS - Sub 10W LED lighting applications ORDERING INFORMATION PACKAGE DIP-8L，Pb free TEMPERATURE RANGE -40℃ to 85℃ ORDERING PART NUMBER PT4227EDIH TRANSPORT MEDIA Tube/50 units MARKING PT4227 xxxxx X Note: xxxxx X Assembly Factory Code Lot Number TYPICAL APPLICATION CIRCUIT D2 R2 C2 C4 R5 DC out AC IN C1 R1 D1 T1 DRAIN D3 DRAIN R3 R4 R6 C3 China Resources Powtech (shanghai) Co. Ltd PT4227_DS Rev...