Patent ID: 11916481
Assignee: FREMONT MICRO DEVICES CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. The Buck constant voltage driver according to claim 1, wherein the output voltage compensation module comprises:
a peak sampling circuit, which is connected between the sampling resistor and the power tube and operable to acquire a voltage peak of the sampling resistor;
a superposition coefficient circuit, which is connected with the peak sampling circuit and operable to multiply the voltage peak acquired by the peak sampling circuit with a superposition coefficient and then output a product of the voltage peak and the coefficient; and
an adding circuit, which is connected with the superposition coefficient circuit and is operable to add the product outputted by the superposition coefficient circuit to the preset first reference voltage to compensate the preset first reference voltage;
wherein the superposition coefficient of the superposition coefficient circuit is d, a voltage dividing ratio of the output voltage acquisition module is α, a diode coefficient in a peripheral circuit of the Buck constant voltage driver is b, a resistance of the sampling resistor is Rcs, and then α*d*Rcs=b.