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PT4203 - Primary Side CC Regulator

General Description

PT4203 is targeted to below 10W LED lighting applications.

It is designed for the flyback topology, and regulates output current without the secondary feedback loop.

The PT4203 provide accurate CC (constant current) regulation with built in compensation circuitry.

Key Features

  • z z z z z z z z z z CC Control Without Secondary Feed back Compensates transformer Inductor Variation Compensates Line Voltage Variation Drive NPN or DNMOS Output Over Voltage Protection Output Short Circuit Protection Feedback resistor open circuit protection Line Under Voltage Protection Cycle by Cycle Current Limit Over Temperature Protection.

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Datasheet Details

Part number PT4203
Manufacturer PowTech
File Size 780.69 KB
Description Primary Side CC Regulator
Datasheet download datasheet PT4203 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PT4203 Primary Side CC Regulator for LED driver DESCRIPTION： PT4203 is targeted to below 10W LED lighting applications. It is designed for the flyback topology, and regulates output current without the secondary feedback loop. The PT4203 provide accurate CC (constant current) regulation with built in compensation circuitry. Integrated line and primary inductance compensation ensures output current free of line voltage and primary inductance variations. Complete protection functions have been integrated allows PT4203 to protect against all fault conditions including cycle by cycle current limit, output open/short circuit, line under-voltage, and over temperature shut down. PT4203 is available in SOT23-5 package.