| 摘要 |
A method for minimizing LED flicker of an LED driver system, the LED driver system comprising a PFC constant average current converter, a capacitor, an LED module, and a current regulator, the method including: a first step: the current regulator generating a control voltage according to an average of a difference between a reference voltage and a voltage at a second end of the LED module; and a second step: the current regulator determining a regulation value for a current flowing through the LED module according to the control voltage. |
| 主权项 |
1. A method for minimizing LED flicker of an LED driver system, said LED driver system comprising a PFC constant average current converter, a capacitor, an LED module, and a current regulator, wherein said PFC constant average current converter has an input coupled to a full-wave-rectified input voltage and an output providing an output voltage and an output current, both said output voltage and said output current being in phase with said full-wave-rectified input voltage, and said output current having a constant average value; said capacitor is coupled between said output of said PFC constant average current converter and a ground; said LED module has a first end coupled to said output of said PFC constant average current converter and a second end coupled to said current regulator; and said current regulator is coupled between said second end of said LED module and said ground, the method including:
using said current regulator, generating a control voltage according to an average of a difference between a reference voltage and a voltage at said second end of said LED module; using said current regulator, determining a regulation value for a current flowing through said LED module according to said control voltage; if the regulation value is higher than the constant average value, reducing the regulation value; and if the regulation value is lower than the constant average value, increasing the regulation value. |
