| 摘要 |
The device for LED direct driver comprises a major LED string, a minor LED string set, a pre-regulator, and a direct driver. The major LED string has multiple series-connected LED diodes which has a first end and a second end. The minor LED string set has a first end and a second end, and is formed with multiple series-connected minor strings. The first end of the minor LED string set is connected to the second of the major LED string. Each minor LED string has at least one LED diode. The direct driver is connected to the pre-regulator, the major LED string, the minor LED string, which is configured to short out selected minor LED strings for ensuring the most efficient LED driving configuration. The pre-regulator provides an regulated voltage output. The regulated voltage output fed to the LED direct driver that is able to allow the LED direct driver to provide a constant power output with virtually no output power ripple. |
