| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device which has achieved both reduction in the number of components and emergency lighting performance, and is usable for both LED normal lighting and emergency lighting.SOLUTION: A normal lighting device 110 comprises a terminal part CN1 connected to a commercial power supply AC, a terminal part CN2 connected to an LED light source part 130, and a terminal part CN3 connected to an emergency lighting device 120. The normal lighting device 110 further includes a rectifier DB, a step-up chopper circuit and a back converter circuit, and a control IC1 therein. The emergency lighting device 120 comprises a terminal part CN4 connected to the terminal part CN3 of the normal lighting device 110, a terminal part CN5 connected to a battery 140 which is an emergency power supply, and a terminal part CN6 connected to the LED light source part 130. The emergency lighting device 120 further includes a lighting circuit 122 including a control IC3. In a state in which a low (L) level signal is input to an EN terminal of the control IC3, the control IC3 is disabled, namely, stopped. In a state in which a high (H) level signal is input to the EN terminal, the control IC3 is enabled, namely, becomes operable.SELECTED DRAWING: Figure 1 |
