LIGHT EMITTING DIODE DRIVING DEVICE

摘要

A LED driving device is electrically connected to a voltage power source and a plurality of LED strings. The LED driving device includes a constant-voltage outputting module, a rectifying unit, and a constant-current controlling unit. The constant-voltage outputting module is electrically connected to the voltage power source and includes a switching unit, a resonant unit, a converting unit, and a power-balancing unit. The resonant unit is electrically connected to the switching unit. The converting unit includes a primary winding, two first secondary windings, and a second secondary winding. The primary winding is electrically connected to the resonant unit. The power-balancing unit includes a balancing converter including two balancing windings electrically connected to the first secondary windings. The rectifying unit is electrically connected to the power-balancing unit and the LED strings, the constant-current controlling unit is electrically connected to the second secondary winding and the LED strings.

主权项

1. A light emitting diode (LED) driving device electrically connected to the voltage power source and a plurality of LED strings, the LED driving device comprising:
a constant-voltage outputting module electrically connected to the voltage power source, the constant-voltage outputting module comprising: a switching unit; a resonant unit electrically connected to the switching unit; a converting unit comprising a primary winding, two first secondary windings, and a second secondary winding, the primary winding electrically connected to the resonant unit; and a power-balancing unit comprising a balancing converter, the balancing converter comprising two balancing windings electrically connected to the first secondary windings; a rectifying unit electrically connected to the power-balancing unit and the LED strings; and a constant-current controlling unit electrically connected to the second secondary winding and the LED strings.