| 摘要 |
A bi-level current configurable driver is provided. The driver includes a feedback circuit, a driver circuit providing a driver signal to a half bridge inverter, and a step-dim interface coupled to a first alternating current input line, a second alternating current input line, and a neutral line, providing voltage to the driver circuit. The driver also includes a first feedforward circuit coupled to the step-dim interface, where the first feedforward circuit receives a first signal from the step-dim interface based on the states of the first alternating current input line, the second alternating current input line, and the neutral line. In a first state, the driver provides full current to a load, and in a second state, the driver provides less than full current to the load. |
| 主权项 |
1. A bi-level current configurable driver comprising:
a driver circuit; a regulator circuit; a feedback circuit; a resistor divider comprising an upper resistor and a lower resistor, the resistor divider determining a reference current provided by the regulator circuit, wherein the upper resistor has a first lead connected to a voltage and a second lead connected to a first input of the regulator circuit, and wherein the lower resistor has a first lead connected to a ground and a second lead connected to the second lead of the upper resistor and the first input of the regulator circuit; and an external resistor coupled in parallel to the first input of the regulator circuit, wherein changing a value of the external resistor changes a value of the reference current; wherein the driver circuit comprises a constant current constant voltage (CCCV) regulator, and wherein the driver further comprises a step-dim circuit coupled between the regulator circuit and a load comprising one or more solid state light sources. |
