PT2203-AC-DC原边反馈恒流恒压开关转换器 PDF文档下载

PT2203_5V1A充电器应用文档 PDF文档下载

GENERAL DESCRIPTION
    The PT2203 is a primary side constant current/current voltage regulator, targeted to applications in less than 5W AC-DC power suppliers. It is designed for the flyback topology, and regulates output current/voltage without the secondary feedback loop. In addition to providing the tight output regulation, the excellent low power control allows the PT2203 to meet all the global energy efficiency and standby power requirements.
The PT2203 provides accurate CV/CC regulation with  built in compensation circuitry. Integrated line and primary inductance compensation ensures output current free of line voltage and primary inductance variations. More over, the integrated output cord resistance compensation further enhances output voltage accuracy.
    A complete set of integrated protection functions allows the PT2203 to protect against all fault conditions including output short circuit, line under-voltage, and over temperature shut down.
    The PT2203 is available in a SOP-8 package.

FEATURES
􀁺 CC and CV Control Without Secondary Feed back
􀁺 Eliminates Compensation Network
􀁺 Built in 650V Power MOSFET
􀁺 Compensates Line Voltage Variation
􀁺 Compensates Inductor Variation in CC mode
􀁺 Compensates Output Cord Resistance
􀁺 Vaux Over Voltage Protection
􀁺 Short Circuit Protection
􀁺 Line Under Voltage Protection
􀁺 Cycle by Cycle Current Limit
􀁺 Over Temperature Protection

APPLICATIONS
􀁺 LED Power Suppliers
􀁺 Power Adapters and Battery Chargers
􀁺 Standby and Auxiliary Suppliers