Epistar’s Blue LED Multiple-Chip Array Simplifies Packaging
The novel High-Voltage (HV) monolithically integrated DC module significantly improves current spreading and the technology enables a white LED with efficacy of 135lm/W white LED at 1W operation.
Epistar has developed a High-Voltage (HV) LED chip that enables 135 lm/W white LED at 1W operation.
The Taiwanese firm has developed a technology suitable for lighting applications to reach high efficacy using a single large chip size (45mil) blue LED chip eliminating the need for complicated packaging of many small-sized chips and their wires.
This technology enables a white LED with efficacy up to 135 lm/W at color temperature of 5000 K. To reach such high efficacy with a simplified package desired in lighting applications, Epistar developed a High-Voltage monolithically integrated DC multiple-chip array to significantly improve current spreading.
Consequently, much lower forward voltage and higher Wall Plug Efficiency (WPE) are achieved at 5.5W operation as compared to normal power chip. Packages of HV LED chips can be used in general lighting and any applications for high-efficacy white light.
HV chips have higher WPE and lower forward voltage as compared to normal power chips with the same chip size.