Tagged with 'CSP LEDs'

p>As a manufacturer, we aim to use the newest LEDs technology in our LED strips and modules. One particularly interesting new technology is the Chip Scale Packaged LEDs, known as CSP or Flip-Chip LEDs.

Before choosing the best performing CSP LED for our products we have compared more than a dozen models from the top LED manufacturers: Nichia, Samsung, Philips Lumileds and Seoul Semiconductor.

For a meaningful comparison we selected LEDs that function at 350 and 700 mA with a voltage between 2.75 and 3.2 V.

For each category we compared the luminous flux and luminous efficacy at the usual junction "lab temperature" of 25ºC and at a more realistic 100ºC. The comparison data is that from the manufacturers datasheet.

CSP at 700mA, maximum 2.5 Watt, for street or outdoor lighting, 5000K, CRI 70.

At 25ºC The Nichia CSP LED has 20% higher flux (304 lm) and 27% better efficacy (145 lm/W) than the second performer, Seoul WICOP (247lm and 114 lm/w). Luxeon Flip Chip White 10 has similar performance (242 lm/w 115lmw) to Seoul while Samsung lags somewhat behind (210 lm and 95 lm/w).

With the development of LED lighting and the high demands of consumers, LED chip manufacturers are continuously improving and innovating. The development of Chip Scale Packaged (Flip Chip or CSP) LEDs is such an inovation, with several advantages: no substrate, solderless cabling, small size and high optical density.

CSP, or Chip Scale Package, is defined as an LED package with a size equivalent to an LED chip, or no larger than 20%. The CSP product has integrated component features that do not require soldered wire connections, reducing thermal resistance, reducing the heat transfer path, and reducing potential sources of error.

Usually, a light emitting diode (LED) has two key components, the LED chip that emits the light and the LED package which focuses it, enables assembly into lighting products and transfers the heat away to the heat sink.