High temperature LED system using an AC power source

An LED system for coupling to an AC power source comprising:

• a rectifier module being electrically coupled to the AC power source and configured to provide a rectified output;
• a first group of LED devices electrically coupled to the rectifier module and configured to receive the rectified output;
• a second group of LED devices electrically coupled to the first group of LED devices;
• a current monitor module electrically coupled to the first group and second group of LED devices, the current monitor module being configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices;
• a temperature sensing module electrically coupled to the current monitor module and configured to generate a at least one compensation factor based at least in part on a temperature;
• and
• an LED submount having a front surface and a back surface, the front surface comprising an inner region and an outer region, the inner region being characterized by a reflectivity of at least 80%.

An LED system for coupling to an AC power source comprising:

• a rectifier module being electrically coupled to the AC power source and configured to provide a rectified output;
• a first group of LED devices electrically coupled to the rectifier module and configured to receive the rectified output;
• a second group of LED devices electrically coupled to the first group of LED devices;
• a current monitor module electrically coupled to the first group and second group of LED devices, the current monitor module being configured to determine a first current level using a drawn current level signal associated with the first group of LED devices and a second current level using a reference current level signal associated with the second group of LED devices;
• a temperature sensing module electrically coupled to the current monitor module and configured to generate a at least one compensation factor based at least in part on a temperature;
• an LED submount having a front surface and a back surface, the front surface comprising an inner region and an outer region, the inner region being characterized by a reflectivity of at least 80%.the first and second groups of LED devices being disposed on the inner region;
• and
• a heat sink coupled to the LED submount, the heat sink being characterized by a thermal emissivity of at least 0.5.