SYSTEMS AND METHODS FOR CONTINUOUS ADJUSTMENT OF REFERENCE SIGNAL TO CONTROL CHIP

摘要

The present disclosure is directed to a solution that provides for continuous adjustment of a reference signal to a control chip to facilitate controlling the average output power. In some aspects, a system may facilitate continuous adjustment of power provided to a device by providing a reference signal with a slope to a control pin (e.g., current control pin) of a control chip (e.g., power regulator or LED driver). Providing a reference signal with a slope (e.g., a triangle or a sinusoidal wave) can increase the control range of the control chip and improve control chip performance. For example, systems and methods of the present disclosure may increase the dimming range of an LED from less than 0.1% to 100%.

主权项

1. A system, comprising:
an electronic chip having a current control input configured to receive a reference signal, and an output coupled to a power input of a device, the electronic chip configured to provide power to the device based on the reference signal input to the current control input; and a wave shape generator having an output coupled to the current control input of the electronic chip to provide the generated reference signal, the wave shape generator configured to generate the reference signal comprising a wave having a first portion above a minimum threshold to turn on the electronic chip, and a second portion below the minimum threshold to turn off the electronic chip, wherein the electronic chip, to control a level of power delivered to the device, cycles between an on state and an off state in response to the first portion of the wave and the second portion of the wave.