| 摘要 |
A stabilizer for a vehicle lamp is provided to expand a lifetime and reduce dimming by supplying stable power to the lamp. An error amplification circuit(30) amplifies an error which is the difference of a reference voltage and an output voltage and outputs it. A differential circuit(50) differentiates a sinusoidal wave from a frequency oscillator(60), and the constant currents circuit(40) outputs a certain constant current. A comparison circuit(20) compares an error voltage value from an error amplification circuit, an output from a differential circuit, saw wave, and it applies a pulse having a certain period to the voltage boosting circuit.
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