| 摘要 |
<p>A power supply converter and a light-emitting diode (LED) lamp. The power supply converter includes a conversion circuit (2) which includes a boost rectifier and filter circuit (22) and a constant current output circuit (23).The maximum output power of the conversion circuit (2) may be up to 4W to 12W, and it can run steadily. An electromagnetic interference (EMI) filter circuit (21) is also connected to the input terminals of the conversion circuit (2) to restrain electromagnetic interference. At the same time, a piezoresistor (VR1) is also connected in parallel with the output terminals of the boost rectifier and filter circuit (22) to prevent a constant current driving chip from being burned out when the output terminals of the conversion circuit (2) has no load. The power supply converter is connected with the LED lamp to supply power to the lamp.</p> |
