PT4105, LED constant current lighting application technology diagram-EEWORLD

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PT4105 is a fixed frequency voltage mode step-down integrated circuit specifically designed for high-power LED lighting drive applications. The input voltage can reach up to 18V, with a built-in power MOS tube and a maximum output current of 1A. It can drive a single 1W (current 350mA) or 3W (current 700mA) LED, or various high-power LED series/parallel combinations within a wide input voltage range. PT4105 uses PWM control internally, with a feedback voltage of only 200mV, and has high conversion efficiency. It contains undervoltage lockout, overheat protection, current limiting protection and other functions. It is easy to design and has simple peripheral circuits. It is an ideal choice for applications such as multi-cell battery-powered flashlights, automotive auxiliary lighting, home decorative lighting, and mining lamps.

PT4105 package

PT4105 uses SOIC8 package. The single 1W high-power LED driving solution implemented by PT4105 has an effective working voltage range of 2.5~18V. When the input voltage is 5~12V,
its conversion efficiency is above 90%, and when the input voltage is 12~18V, its conversion efficiency can be above 85%. The single 3W high-power LED driving solution implemented by PT4105 has an effective working voltage range of 6~18V, and its conversion efficiency can be above 85%. The working picture of PT4105 is as follows:

Model: PT4105
Main parameters:
Working mode: PWM;
Input voltage: 2.5-18/V;
Output voltage: 18V;
Switch tube: built-in;
Working frequency: 500KHZ;
Efficiency: 85%
Package: SOP-8.
Application: LED lighting, MR16 spotlights, 1W/3W and other lighting fixtures.

Keywords：PT4105 LED Reference address：PT4105, LED constant current lighting application technology diagram

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