Led driving chip and circuit with power compensation
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The present invention discloses an LED driving circuit. The LED driving circuit comprises a rectifying circuit, an LED power supply circuit and an LED driving chip, wherein the LED driving chip can generate a reference voltage corresponding to an input voltage, and controls the LED powers supply circuit to supply a driving current to an LED lamp. The LED driving circuit of the invention real-timely adjusts the output power of the LED driving chip under input low/high voltages, compensates the output power dynamically, and reduces the effects of the real-time change of the input voltage on the output of the driving circuit, so that under the precise of using a smaller high-voltage capacitor and an output filter capacitor, an outputted power frequency ripple is reduced to thereby reduce the dependency of the driving circuit on the high voltage capacitor, especially an electrolytic capacitor, the ripple wave of the output current is reduced to thereby realize a driving mode with the inexistence of the electrolytic capacitor, and the service life of the LED driving circuit is improved.