| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED lighting device compatible with a wide range of load voltage while suppressing an increase in a manufacturing cost and power loss. <P>SOLUTION: In an LED lighting device of an embodiment, as direct current (DC) output voltage of a power supply part 1 (load voltage of an LED lamp 100) is reduced, a resistance value of a current-limiting resistor part 40 is switched to a smaller value, so that the LED lighting device can be compatible with a wide range of load voltage. In addition, a control power supply part 4 generates control power source not from a DC power source 5 but from the DC output voltage of the power supply part 1, so that an increase in a manufacturing cost is suppressed without using a circuit component of a high breakdown voltage, and an increase in power loss due to current-limiting resistors R1 and R2 can be suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
