Boost apparatus with integration of OCP detection and OVP detection

摘要

A boost apparatus including a boost power conversion circuit and a control chip is provided. The boost power conversion circuit is configured to receive a DC input voltage and provide a DC output voltage to a light-emitting-diode (LED) load in response to a pulse-width-modulation (PWM) signal. The control chip has a first complex function pin, and is configured to: generate the PWM signal to control the operation of the boost power conversion circuit; perform an OCP detection on the boost power conversion circuit through the first complex function pin when the PWM signal is enabled to determine whether to activate an OCP mechanism; and perform an OVP detection on the boost power conversion circuit through the first complex function pin when the PWM signal is disabled to determine whether to activate an OVP mechanism.

主权项

1. A boost apparatus suitable for providing a direct current (DC) output voltage to a light-emitting diode (LED) load, the boost apparatus comprising:
a boost power conversion circuit configured to receive a DC input voltage and provide the DC output voltage to the LED load in response to a pulse-width-modulation (PWM) signal; and a control chip coupled to the boost power conversion circuit and having a first complex function pin, wherein the control chip is configured to:
generate the PWM signal to control an operation of the boost power conversion circuit;perform an over-current protection (OCP) detection on the boost power conversion circuit through the first complex function pin when the PWM signal is enabled to determine whether to activate an OCP mechanism; andperform an over-voltage protection (OVP) detection on the boost power conversion circuit through the first complex function pin when the PWM signal is disabled to determine whether to activate an OVP mechanism.