LED DRIVER, AND METHOD AND DEVICE FOR CONTROLLING FIXED VALUE OF LED DRIVER

摘要

Provided in an embodiment of the present invention are an LED driver, and method and device for controlling the fixed value of the LED driver, the method comprising: detecting whether an existing terminal of an LED driver inputs a control signal; when the control signal is detected, determining the fixed value of the LED driver according to the control signal; when the LED driver is an LED driver having no dimming function, the fixed value is the rated current of the LED driver; when the LED driver is an LED driver having a dimming function, the fixed value includes the upper limit or lower limit of the output current value of the LED driver. The method, device and the LED driver provided in the embodiment of the present invention can save LED driver costs.

主权项

1. A control method for controlling a fixed value of an LED driver, comprising:
detecting whether a control signal is input to existing terminals of the LED driver, wherein the LED driver comprises a first pair of terminals and a second pair of terminals, the first pair of terminals comprises an input line Va and an input line Vb, the second pair of terminals comprises a positive output line Vo+ and a negative output line Vo−, the existing terminals are any pair of terminals of the LED driver, and the control signal is a signal different from an output signal or an input signal of the terminals of the LED driver operating normally; and determining the fixed value of the LED driver according to the control signal in a case that the control signal is detected, wherein the fixed value is an output parameter of the LED driver and the output parameter is an output voltage value or an output current value, wherein the fixed value is a rated current of the LED driver in a case that the fixed value is the output current value of the LED driver and the LED driver is an LED driver having no dimming function; or the fixed value comprises an upper limit or a lower limit of the output current value of the LED driver, in a case that the fixed value is the output current value of the LED driver and the LED driver is an LED driver having a dimming function.