Patent ID: 9655180
Date: 2017-05-16
CPC Classifications: H05B,Y02B

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 characterized by an operating period and a duty cycle; and a control circuit coupled to the load regulation circuit and configured to control an average magnitude of the load current, the control circuit configured to operate in a normal mode and a burst mode, the burst mode comprising an active state during an active state period of a burst mode period and an inactive state during an inactive state period of the burst mode period; wherein, during the normal mode, the control circuit is configured to regulate the average magnitude of the load current towards a target load current by adjusting an on time of the inverter circuit; and wherein, during the burst mode, the control circuit is configured to adjust the operating period of the inverter circuit to a low-end operating period by adjusting the on time of the inverter circuit to a value less than or equal to a minimum on time while holding the duty cycle of the inverter circuit constant, the control circuit further configured to regulate the average magnitude of the load current towards the target load current by adjusting a length of the active state period and a length of the inactive state period.