Patent ID: 9565731
Date: 2017-02-07
CPC Classifications: H02M,H05B

Claim:
1. A load control device for controlling an amount of power delivered to an electrical load, the load control device comprising: a load regulation circuit configured to control a magnitude of a load current conducted through the electrical load to control the amount of power delivered to the electrical load, the load regulation circuit comprising an inverter circuit; and a control circuit coupled to the load regulation circuit and configured to regulate an average magnitude of the load current, the control circuit configured to control the inverter circuit to operate in active state periods during which the inverter circuit is active and in inactive state periods during which the inverter circuit is inactive, the control circuit further configured to operate in a normal mode and a burst mode, the burst mode characterized by a plurality of burst mode periods each comprising one of the active state periods and one of the inactive state periods, wherein, during the normal mode, the control circuit is configured to regulate the average magnitude of the load current by holding a length of the active state periods and a length of the inactive state periods constant, and adjusting a target load current conducted through the electrical load, and wherein, during the burst mode, the control circuit is configured to adjust the average magnitude of the load current by adjusting the length of the inactive state periods while holding the length of the active state periods constant in at least some of the burst mode periods.