Abstract: A power converting device includes a power transistor, a detecting device, a signal converter and a controller. The detecting device obtains a detection voltage by detecting an output voltage on the output end of the power converting device and a detection current by detecting an operation current of the power transistor. The signal converter converts the detection voltage from a first format to a second format, and converts the detection current from the first format to the second format. The controller receives the detection voltage and the detection current in the second format. Wherein the controller compares the detection voltage with a first voltage threshold value and a second voltage threshold value to adjust a control code, and generates a control signal to a control end of the power transistor according to the control code.

Abstract: A power supply device and an operation method thereof are provided. The power supply device includes a charge pump circuit and a power supply circuit. The power supply circuit supplies a first power voltage to the charge pump circuit. The charge pump circuit converts the first power voltage into a second power voltage so as to supply the second power voltage to an application circuit. The power supply circuit detects the second power voltage or an output current output by the charge pump circuit to obtain a detection result. The power supply circuit dynamically adjusts the first power voltage based on the detection result.

Abstract: A power converter includes a high side switch, a low side switch, a low side driver, a loading detector, a configurable regulator and a high side driver. The low side driver generates a low side drive signal to control the low side switch. The configurable regulator generates a regulation voltage, a magnitude of which is greater when the loading detector detects that the power converter has light loading than when the loading detector detects that the power converter has heavy loading. The high side driver generates a high side drive signal that switches between the input voltage and the regulation voltage to control the high side switch.

Abstract: The invention provides a light-emitting diode (LED) driver and a driving method thereof. The LED driver includes a brightness code calculation circuit, a driving current generation circuit and a control circuit. The brightness code calculation circuit is configured to to receive a pulse width modulation (PWM) signal and perform a calculation operation comprising calculating a duty cycle of the PWM signal with respect to a period of the PWM signal and generating a brightness code according to the duty cycle of the PWM signal. The driving current generation circuit is configured to generate a driving current according to the brightness code. The control circuit is configured to detect a plurality of brightness codes generated by the brightness code calculation circuit repeatedly performing the calculation operation and determine whether or not to adjust an execution frequency of the calculation operation of the brightness code calculation circuit according to the brightness codes.

Abstract: The invention provides a light-emitting diode (LED) driver and a driving method thereof. The LED driver includes a brightness code calculation circuit, a driving current generation circuit and a control circuit. The brightness code calculation circuit is configured to to receive a pulse width modulation (PWM) signal and perform a calculation operation comprising calculating a duty cycle of the PWM signal with respect to a period of the PWM signal and generating a brightness code according to the duty cycle of the PWM signal. The driving current generation circuit is configured to generate a driving current according to the brightness code. The control circuit is configured to detect a plurality of brightness codes generated by the brightness code calculation circuit repeatedly performing the calculation operation and determine whether or not to adjust an execution frequency of the calculation operation of the brightness code calculation circuit according to the brightness codes.

Abstract: A digital temperature sensing system and method for converting a test temperature into a digital output signal are disclosed. The system comprises a temperature-to-time circuit for generating a thermally sensitive time signal of which a width varies with the test temperature; an adjustable time reference circuit for generating a time reference signal of which a width changes with the digital set value; a time comparator for generating a time comparison signal according to a width difference between the thermally sensitive time signal and the time reference signal; a logic control circuit for adjusting the digital set value of the adjustable time reference circuit according to the time comparison signal so that the width of the thermally sensitive time signal and the width of time reference signal are close enough or substantially equal.

Abstract: A digital temperature sensing system and method for converting a test temperature into a digital output signal are disclosed. The system comprises a temperature-to-time circuit for generating a thermally sensitive time signal of which a width varies with the test temperature; an adjustable time reference circuit for generating a time reference signal of which a width changes with the digital set value; a time comparator for generating a time comparison signal according to a width difference between the thermally sensitive time signal and the time reference signal; a logic control circuit for adjusting the digital set value of the adjustable time reference circuit according to the time comparison signal so that the width of the thermally sensitive time signal and the width of time reference signal are close enough or substantially equal.