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PT4227 Dataheets PDF



Part Number PT4227
Manufacturers PowTech
Logo PowTech
Description 1-10W Primary Side CC Regulator
Datasheet PT4227 DatasheetPT4227 Datasheet (PDF)

PT4227 1-10W Primary Side CC Regulator GENERAL 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 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 inducta.

  PT4227   PT4227


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PT4227 1-10W Primary Side CC Regulator GENERAL 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 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 PT4227 is available in an DIP-8L package. FEATURES          CC Without Secondary Feedback Integrates 600V Power Switch Inductance Compensation Low Startup Current (<10uA) 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 xxxxxX Note: xxxxxX Assembly Factory Code Lot Number TYPICAL APPLICATION CIRCUIT D2 R2 C2 C4 R5 DC out AC IN C1 R1 D1 T1 NC DRAIN PT4227 CS D3 DRAIN VCC R3 FB R4 R6 C3 GND China Resources Powtech (shanghai) Co. Ltd PT4227_DS Rev EN1.0 WWW.CRPOWTECH.COM Page 1 PT4227 1-10W Primary Side CC Regulator PIN ASSIGNMENT CS 1 8 DRAIN PT4227 CS 2 GND FB 3 4 7 DRAIN 6 NC 5 VCC DIP-8L PIN DESCRIPTIONS PIN No. DIP-8L 1,2 3 4 5 6 7,8 PIN NAMES CS GND FB VCC NC DRAIN DESCRIPTION Primary Side Current Sense Input Ground Feedback Winding Voltage Sense Input Power supply, the device is supplied by an auxiliary winding. Not connected Internal power switch output, drive primary winding ABSOLUTE MAXIMUM RATINGS (note1) SYM PARAMETER VALUE UNIT VCC VFB,VCS VDRAIN Topt Tstg ESD RΘJA VCC pin Voltage FB,CS pin Input Voltage DRAIN pin Voltage Operating Junction Temp. Range Storage Temp. Range HBM DIP_8L -0.3~35 -0.3~5 -0.3~600 -40 to 150 -55 to 150 2000 107 V V V ℃ ℃ V ℃/W Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended Operating Range indicates conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the Operating Range. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance. RECOMMENDED OPERATING RANGE SYM PARAMETER VALUE UNIT VCC TA VCC pin Operating Voltage Operating Ambient Temperature 9.5~26 -20~85 V ℃ China Resources Powtech (shanghai) Co. Ltd PT4227_DS Rev EN1.0 WWW.CRPOWTECH.COM Page 2 .


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