| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lamp regulator capable of reducing a manufacturing cost by simplifying a circuit.SOLUTION: An LED lamp regulator comprises: a first inductor connected between the other end of a coupling capacitor and a first LED terminal to configure a coupled inductor; a second inductor whose one end is connected to one end of the coupling capacitor to configure a coupled inductor; a diode in which a cathode is connected to the other end of the coupling capacitor and an anode is connected to the other end of the second inductor; a detection resistor connected between the other end of the second inductor and a second battery terminal; and a constant current PWM control circuit which PWM-controls a switching element on the basis of the detection current flowing through the detection resistor so that the LED current flowing through the first LED terminal becomes a target value. |
