ALTERNATING CURRENT INJECTION FOR CONSTANT-ON TIME BUCK CONVERTER - A REGULATOR CONTROL METHOD

摘要

The present invention discloses a voltage control method. At first, the load voltage of the load is divided to generate a feedback voltage. The feedback voltage and a triangular wave of a triangular wave periodic signal, including the positive voltage and negative voltage, are combined to generate a sum signal. The sum signal is compared with a target voltage, and when the sum signal is less than the target voltage signal, a control signal is generated to control the switches to turn on or off. Finally, the switch receives the control signal and accordingly providing an input voltage to update and stabilize the load voltage.

主权项

1. A regulator control method comprising the following steps:
receiving a periodic triangular wave signal, wherein the periodic triangular wave signal is produced by:
(a) receiving a periodic trapezoidal wave signal, with each cycle of the trapezoidal wave signal comprising, in chronological order, an initial voltage, a sampling signal and an end voltage, wherein an absolute value of the initial voltage is greater than an absolute value of the end voltage;(b) capturing an average of an end voltage of a first cycle and an initial voltage of a second cycle following the first cycle; and(c) subtracting a sample signal of the second cycle from the average of the end voltage of the first cycle and the initial voltage of the second cycle; adding the periodic triangular wave signal with a feedback voltage indicative of a load voltage from a load to generate a sum signal; comparing the sum signal to a target voltage to generate a control signal; updating and stabilizing the load voltage using the control signal and an input voltage when the sum signal is less than the target voltage.