Shanghai Huarun silicon high power LED driver chip efficiency up to 90%

PT4105 is a fixed frequency voltage mode buck Shanghai Huarun powtech, newly developed specifically for high power LED lighting drive integrated circuit, the input voltage is up to 18V, built-in power MOS, the maximum output current is up to 1A, can be in a wide input voltage range of driving single 1W (current 350mA) or 3W (700mA) LED, or a variety of high-power LED series / parallel combination.

According to reports, PT4105 internal use of PWM control, the feedback voltage is only 200mV, has very high conversion efficiency, including undervoltage lockout, overheat protection, current limiting protection function, use convenient design, simple peripheral circuit, is an ideal choice for multi cell battery flashlight, automobile auxiliary lighting, decorative lighting, etc. The Application of miner's family the. PT4105 uses SOIC8 package.

Drive scheme for single 1W PT4105 high power LED, working voltage range is 5 ~ 18V, when the input voltage is 5 ~ 12V, the conversion efficiency is more than 90%, when the input voltage is 12 ~ 18V, the conversion efficiency of more than 85%. Using PT4105 to achieve a single 3W high-power LED driver program, the effective operating voltage range of 6 ~ 18V, the conversion efficiency of more than 85%. PT4105 currently available samples and presentation boards available.

Shanghai Huarun powtech was founded in August 2004, by the Hongkong Huarun Li investment, a group of overseas senior professionals who created the Integrated Circuit Design Company, focusing on R & D design of analog / mixed signal integrated circuit products. At present, the company's product line includes a variety of DC-DC conversion, LED drive, high performance amplifier / audio power amplifier and high performance LDO, customers include well-known domestic mobile phone, personal digital consumer electronic products, home appliances and other enterprises.