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Power supply geared for LED moving signs

Posted: 06 Jan 2012 ?? ?Print Version ?Bookmark and Share

Keywords:power supply? LED moving sign? RGB LED?

Mean Well Enterprises Co. Ltd has introduced a couple of power supplies that claim to address the high-efficiency power supply requirement for LED moving sign makers. The HDP-190 and HDP-240 series are 192W and 241W AC/DC enclosed type power supplies, respectively, featuring 1U low profile, active PFC function and low voltage dual output.

The HDP-190, with fanless design, provides up to 3.8V/40A and 2.8V/22A at each output channel while HDP-240, with built-in DC fan, provides up to 3.8V/50A and 2.8V/27.5A. The two models are designed to drive the RGB LED chips by 3.8V/2.8V outputs. Compared to the traditional driving method that use only one 5V power supply to drive RGB LEDs by further dragging down to different voltages, this system design concept increases overall efficiency by using lower driving voltages directly, stated the company.

HDP-190, HDP-240

The power supplies comply with UL, CUL, TUV, CB and CE.

The HDP-190/240 power supplies implement the AC/DC high efficiency circuit design and non-isolated DC/DC buck topology that make the efficiency up to 84 percent and 86 percent, respectively, even for their low output voltages. With fanless design, HDP-190 can be cooled from -30C to 40C ambient temperature by only free air convection and HDP-240 can be operated from -30C to 50C ambient temperature under full load condition by its built-in DC fan.

The two new models can be operated up to 70C by suitable derating that meets all kinds of outdoor/indoor assembly requirements. Furthermore, in order to fit in with the humid and dusty environment of LED moving sign installation, the devices are equipped with basic anti-moisture and anti-dust ability by the conformal coating protection on the PCB. Other standard functions include short circuit, overload, overvoltage and overtemperature protection and cooling fan ON/OFF control (HDP-240 only). In addition, the power supplies comply with UL, CUL, TUV, CB and CE. Applications include LED electric display/moving sign, LED TV wall and LED channel letter related applications.

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