Abstract: 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.

Abstract: 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.

Abstract: A boost apparatus adapted for providing a direct-current (DC) output voltage to a load is provided, and the boost apparatus includes a boost power conversion circuit and a control chip. The boost power conversion circuit has a diode coupled to the load. Besides, the boost power conversion circuit is configured to receive a DC input voltage and provide the DC output voltage to the load in response to a pulse-width-modulation (PWM) signal. The control chip is coupled to the boost power conversion circuit and configured to generate the PWM signal to control the operation of the boost power conversion circuit. The control chip is also configured to stop outputting the PWM signal and enter into a shutdown state when the diode is an open circuit or a short circuit, so as to protect the boost apparatus and/or the load from being damaged.

Abstract: A load driving apparatus relating to light-emitting-diodes (LEDs) is provided. In the invention, a compensation voltage on a compensation pin (CMP) of a control chip does not change in response to (or with) the variation (i.e. enabling and disabling) of a pulse-width-modulation (PWM) signal for dimming. In other words, regardless of whether the PWM signal for dimming is enabled or disabled, the compensation voltage on the compensation pin of the control chip maintains unchanged. Therefore, an LED string at the current switching transient does not have the generation of over-shoot current. Furthermore, by detecting the compensation voltage on the compensation pin of the control chip, the control chip would enter into a shutdown status in response to the detected compensation voltage being greater than a predetermined threshold voltage for a predetermined counting time in case that the LED string is failure.

Abstract: A load driving apparatus relating to light-emitting-diodes (LEDs) is provided. In the invention, a compensation voltage on a compensation pin (CMP) of a control chip does not change in response to (or with) the variation (i.e. enabling and disabling) of a pulse-width-modulation (PWM) signal for dimming. In other words, regardless of whether the PWM signal for dimming is enabled or disabled, the compensation voltage on the compensation pin of the control chip maintains unchanged. Therefore, an LED string at the current switching transient does not have the generation of over-shoot current. Furthermore, by detecting the compensation voltage on the compensation pin of the control chip, the control chip would enter into a shutdown status in response to the detected compensation voltage being greater than a predetermined threshold voltage for a predetermined counting time in case that the LED string is failure.

Abstract: A load driving apparatus relating to light-emitting-diodes (LEDs) is provided. In the invention, a compensation voltage on a compensation pin (CMP) of a control chip does not change in response to (or with) the variation (i.e. enabling and disabling) of a pulse-width-modulation (PWM) signal for dimming. In other words, regardless of whether the PWM signal for dimming is enabled or disabled, the compensation voltage on the compensation pin of the control chip maintains unchanged. Therefore, an LED string at the current switching transient does not have the generation of over-shoot current.

Abstract: A load driving apparatus related to light-emitting-diodes (LEDs) is provided. The load driving apparatus includes a power conversion circuit, a current detection circuit, and a control chip. The power conversion circuit receives a DC input voltage and provides a DC output voltage to at least one LED string in response to a gate pulse-width-modulation (PWM) signal. The current detection circuit is serially connected with the LED string and provides a feedback voltage related to a current flowing through the LED string. The control chip generates the gate PWM signal to control the operation of the power conversion circuit. When the LED string is short-circuited, the control chip is shut down in response to the feedback voltage from the current detection circuit, so as to stop generating the gate PWM signal and thus protect the load driving apparatus from being damaged.

Abstract: A boost apparatus includes: a boost power conversion circuit having a first diode coupled to a load, and configured to receive a DC input voltage and provide a DC output voltage to the load in response to a pulse-width-modulation (PWM) signal; a complex function detection circuit coupled to an anode of the first diode and configured to detect whether the DC output voltage is over-voltage and detect whether the first diode is open-circuit and accordingly provide a detection signal; and a control chip configured to: generate the PWM signal to control the operation of the boost power conversion circuit; and stop outputting the PWM signal and enter a shutdown status in response to the detection signal when the first diode is open-circuit or the DC output voltage is over-voltage, thereby protecting the boost apparatus and/or the load from damaging.

Abstract: A boost type power converting apparatus is disclosed. The boost type power converting apparatus includes a boost type power converting circuit and a protection circuit. The boost type power converting circuit receives an input voltage and generates an output signal at an output terminal thereof according to the input voltage, and outputs the output signal to a load. The protection circuit is coupled between the boost type power converting circuit and the load in series to form an electrical loop, and turns on or off the electrical loop according to the output signal.

Abstract: A load driving apparatus related to light emitting diodes (LED) is provided. The load driving apparatus includes a power conversion circuit, a complex function circuit, and a control chip. The power conversion circuit receives a DC input voltage and provides a DC output voltage to at least one LED string in response to a gate pulse-width-modulation (PWM) signal. The complex function circuit is serially connected with the LED string and provides a short-protection mechanism. The control chip is coupled to the power conversion circuit and the complex function circuit. The control chip generates the gate PWM signal to control the operation of the power conversion circuit, and when the LED string is short-circuited, the control chip controls the complex function circuit to activate the short-protection mechanism, so as to protect the load driving apparatus from being damaged.

Abstract: A load driving apparatus and a driving method thereof are provided. The load driving apparatus includes a power conversion circuit and a control chip. The power conversion circuit receives a DC input voltage, and drives an LED load in response to a gate PWM signal. The control chip is configured to: provide the gate PWM signal having a first preset duty cycle during a light operation period of a dimming operation, so that the LED load is fully turned on; and provide the gate PWM signal having a second preset duty cycle during a dark operation period of the dimming operation, so that the LED load is slightly turned on. The second preset duty cycle is far less than the first preset duty cycle. A current of the LED load during the light operation period is far more than a current of the LED load during the dark operation period.

Abstract: A boost apparatus adapted for providing a direct-current (DC) output voltage to a load is provided, and the boost apparatus includes a boost power conversion circuit and a control chip. The boost power conversion circuit has a diode coupled to the load. Besides, the boost power conversion circuit is configured to receive a DC input voltage and provide the DC output voltage to the load in response to a pulse-width-modulation (PWM) signal. The control chip is coupled to the boost power conversion circuit and configured to generate the PWM signal to control the operation of the boost power conversion circuit. The control chip is also configured to stop outputting the PWM signal and enter into a shutdown state when the diode is an open circuit or a short circuit, so as to protect the boost apparatus and/or the load from being damaged.

Abstract: A driving apparatus for a fluorescent tube and a method thereof and an illumination apparatus using the same are provided. The driving apparatus stops providing power, when a fluorescent tube has broken, to both ends of the broken fluorescent tube regardless of whether a power switch related to the fluorescent tube is in ON or OFF state, and thus making sure that a person is under a safety condition without getting an electric shock during replacing the broken fluorescent tube; moreover, the driving apparatus automatically detects the newly installed fluorescent tube and automatically light up the newly installed fluorescent tube after the broken fluorescent tube is replaced and it is unnecessary to switch the power switch related to the fluorescent tube anymore, and thus avoiding a potentially hazard for the person who climbs up and down a ladder repeatedly.

Abstract: A load driving apparatus and a driving method thereof are provided. The load driving apparatus includes a power conversion circuit and a control chip. The power conversion circuit receives a DC input voltage, and drives an LED load in response to a gate PWM signal. The control chip is configured to: provide the gate PWM signal having a first preset duty cycle during a light operation period of a dimming operation, so that the LED load is fully turned on; and provide the gate PWM signal having a second preset duty cycle during a dark operation period of the dimming operation, so that the LED load is slightly turned on. The second preset duty cycle is far less than the first preset duty cycle. A current of the LED load during the light operation period is far more than a current of the LED load during the dark operation period.

Abstract: A load driving apparatus relating to light-emitting-diodes (LEDs) is provided. In the invention, a compensation voltage on a compensation pin (CMP) of a control chip does not change in response to (or with) the variation (i.e. enabling and disabling) of a pulse-width-modulation (PWM) signal for dimming. In other words, regardless of whether the PWM signal for dimming is enabled or disabled, the compensation voltage on the compensation pin of the control chip maintains unchanged. Therefore, an LED string at the current switching transient does not have the generation of over-shoot current.

Abstract: A boost type power converting apparatus is disclosed. The boost type power converting apparatus includes a boost type power converting circuit and a protection circuit. The boost type power converting circuit receives an input voltage and generates an output signal at an output terminal thereof according to the input voltage, and outputs the output signal to a load. The protection circuit is coupled between the boost type power converting circuit and the load in series to form an electrical loop, and turns on or off the electrical loop according to the output signal.

Abstract: A load driving apparatus related to light emitting diodes (LED) is provided. The load driving apparatus includes a power conversion circuit, a complex function circuit, and a control chip. The power conversion circuit receives a DC input voltage and provides a DC output voltage to at least one LED string in response to a gate pulse-width-modulation (PWM) signal. The complex function circuit is serially connected with the LED string and provides a short-protection mechanism. The control chip is coupled to the power conversion circuit and the complex function circuit. The control chip generates the gate PWM signal to control the operation of the power conversion circuit, and when the LED string is short-circuited, the control chip controls the complex function circuit to activate the short-protection mechanism, so as to protect the load driving apparatus from being damaged.

Abstract: A boost type power converting apparatus is disclosed. The boost type power converting apparatus includes a boost type power converting circuit and a protection circuit. The boost type power converting circuit receives an input voltage and generates an output signal at an output terminal thereof according to the input voltage, and outputs the output signal to a load. The protection circuit is coupled between the boost type power converting circuit and the load in serial to form an electrical loop, and turns on or off the electrical loop according to the output signal.

Abstract: The disclosure provides a load driving apparatus relating to an LED lamp and a method thereof and an illumination apparatus using the same. The disclosure can use a low-pass filter to filter out the high-frequency PWM signal output from the control chip and to provide a DC low voltage level to the PWM dimming pin of the control chip when the LED lamp gets short circuit. In this way, the control chip is able to entirely stop outputting the PWM signal in response to the DC low voltage level provided by the low-pass filter so as to avoid all the components in the load driving apparatus from damaging caused by the short circuit of the LED lamp.

Abstract: A backlight apparatus includes light emitting diode (LED) modules. Each LED module includes a first connection pin set, a second connection pin set, a driving circuit, a first LED string, and a second LED string. Each of the connection pin sets has a first and second power connection pins and a first and second ground connection pins. The first and second power connection pins are coupled to each other, and the first and second ground connection pins are coupled to each other. The first ground connection pin of the first connection pin set is coupled to the first power connection pin of the second connection pin set. The driving circuit is used to provide a driving signal. Each of the LED strings is serially connected between the second power connection pin and the second ground connection pin of each of the connection pin sets and receives the driving signal.