Abstract: A power converting circuit and a feedback control circuit for the power converting circuit are disclosed. The feedback control circuit comprises a feedback controller and a level controlling unit. The feedback controller generates a feedback control signal according to a reference voltage signal and a feedback signal. The level controlling unit receives one of the reference voltage signal and the feedback signal and modules a level of the received signal from a first level to a second level with time according to a level adjusting signal.

Abstract: An LED driving circuit includes a first and a second LED modules, a first and a second switching converters, an extreme voltage detecting and selecting circuit, a current balance circuit and a controller. The first switching converter transforms electric power of an input power supply into a first output voltage for lighting the first LED module. The second switching converter transforms electric power of the input power supply into a second output voltage for lighting the second LED module. The current balance circuit balances the currents flowing through the first and the second LED modules. The extreme voltage detecting and selecting circuit detects the first and the second LED modules and selects to output one of detecting results. The controller controls the transforming of the first switching converter and the second switching converter to light the first and the second LED modules in response to the outputted detecting result.

Abstract: A constant on-time period of a DC to DC buck converting controller is adjusted according to a level of a preset output voltage. Therefore, the DC to DC buck converting controller of the present invention is suitable for any applications with different requests of output voltages or different operating mode.

Abstract: The present invention discloses a battery charging controller for balancing the charged batteries. The battery charging controller comprises a battery reference voltage generator, a voltage balancing module and a balance judging circuit. The battery charging controller determines which one has the lower voltage between battery units of a battery module according to reference voltages generated by the battery reference voltage generator. The voltage balancing module controlled by the balance judging circuit allows the charging current of the lower-voltage battery larger than the charging current of the higher-voltage battery in such that the final voltages of the battery units are substantially equaled when they are completely saturated.

Abstract: A controller with protection function, for controlling a transistor having a control terminal, a first terminal coupled to a load, a second terminal, is disclosed. The controller comprises a judgment unit and a current control unit. The judgment unit is coupled to the transistor and generates a current reducing signal when a potential of the first terminal of the transistor or a voltage difference between the first terminal and the second terminal of the transistor is higher than a preset value. The current control unit is coupled to the control terminal of the transistor for substantially stabilizing the current flowing through the transistor at a preset current value, and reduces the current flowing from the preset current value when receiving the current reducing signal.

Abstract: The present invention provides a full-bridge driving controller and a full-bridge converting circuit, which have the function of soft switch, to provide a DC output voltage. The present invention employs a resonant unit to oscillate the current flowing through the converting circuit at a resonant frequency. The full-bridge driving controller switches four full-bridge transistor switches at an operating frequency higher than the resonant frequency, so as to achieve the function of soft switch.

Abstract: A converting controller is provided and comprises a first comparing unit, a second comparing unit, a duty cycle operating unit and a reference voltage supplying unit. The first comparing unit receives a detecting signal representing a state of the load and a first reference signal, and generates a first comparing signal accordingly. The duty cycle operating unit controls power conversion of the converting circuit according to the first comparing signal. The second comparing unit receives the detecting signal and a second reference signal, and generates a second comparing signal accordingly. The reference voltage supplying unit supplies the first reference signal and adjusts a level of the first reference signal in response to the second comparing signal.

Abstract: A converting controller comprises a power pin, a ground pin, at least one input pin, at least one output pin, at least one set pin and a failure generating circuit. The power pin is adapted to be coupled with a power source to receive electric power for operation, and the ground pin is adapted to be grounded. The input pin is adapted to receive a corresponding input signal and the output pin is used to output a corresponding output signal. The set pin is adapted to set a corresponding operating parameter of the converting controller. The failure generating circuit is coupled with and uses one of the input pin and the set pin as a protection output pin. The failure generating circuit modulates the level of the protection output pin to be a protection logic level when the converting controller is under a protection state.

Abstract: The present invention relates to a charge pump circuit with current detecting and a method thereof. The current detecting charge pump circuit includes a controlled current source, a load circuit which electrically connects to the charge pump circuit unit, and is driven by the charge pump circuit unit to generate a load current. A detecting circuit unit electrically connects to the load circuit, and produces a feedback signal according to the load circuit. A feedback circuit unit which electrically connects to the detecting circuit unit, receives the feedback signal, and adjusts a current of the controlled current source according to the feedback signal. The charge pump circuit also includes a protecting circuit unit which is able to detect feedback signal to protect the circuit according to the feedback signal.

Abstract: The present invention provides an LED (Light-Emitting Diode) driving control circuit for controlling a converting circuit to transform an input power source into an output voltage for driving an LED module. The LED module has a plurality of LED strings. The LED driving control circuit includes a voltage detecting circuit and a feedback control circuit. The voltage detecting circuit has a plurality of detection circuits, and each detection circuit is coupled to a terminal of the corresponding LED string to determine whether a voltage of the terminal is higher or lower than a preset value. The voltage detecting circuit generates a feedback signal according to the determination results. The feedback control circuit controls the converting circuit to modulate the output voltage according to the feedback signal.

Abstract: An LED (Light-Emitting Diode) driving circuit to drive an LED module is provided. The LED driving circuit includes a converting circuit and a feedback control circuit. The converting circuit is coupled to the LED module, and converts an input voltage into an output voltage according to at least one control signal. The feedback control circuit generates the control signal to control the converting circuit to perform voltage conversion according to a feedback signal. In addition, the feedback control circuit receives a dimming signal, and is operated in a first state or a second state in response to the dimming signal, wherein the feedback control circuit adjusts the duty cycle of the control signal to have the duty cycle larger than or equal to a predetermined duty cycle in a predetermined period right after the feedback control circuit is operated from the second state to the first state.

Abstract: A converting control circuit, adapted to control a converting circuit to convert an input voltage into an output voltage for driving a load, is provided. The converting control circuit comprises a current control circuit, a first detecting circuit, a second detecting circuit, a feedback controller and a feedback circuit. The current control circuit comprises at least one control end coupled to the load to adjust a current flowing through the load. The first detecting circuit is coupled to the current control circuit and generates a first detecting signal according to the voltage at the least one control end. The second detecting signal is coupled to the converting circuit and generates a second detecting signal according to the output voltage. The feedback circuit is coupled to the first and second detecting circuit and modulates a level of the second signal according to the first detecting signal.

Abstract: The present invention provides a feedback control circuit and an LED driving circuit for using the same, wherein the feedback control circuit receives a dimming signal. The dimming signal is changed between a first state and a second state. When being in the first state, the feedback control circuit controls a converter circuit to drive the LED module for lighting stably. When being in the second state, the feedback control circuit controls the converter circuit to maintain the power conversion of the converter circuit to have an output voltage outputted by the converter circuit maintained at a level close to a lighting threshold voltage of the LED module.

Abstract: A spike suppression circuit for filtering out voltage oscillation produced by an inductive component and a conversion control circuit are disclosed. The spike suppression circuit includes an energy release path and a detection circuit. One end of the energy release path is coupled to a connection terminal of a circuit, and the other end thereof is coupled to a reference voltage. The detection circuit is coupled to the connection terminal. The detection circuit has a high-pass component for turning on the energy release path when the voltage on the connection terminal has a high-frequency signal.

Abstract: A battery over-current protection controller includes a current sense circuit, a first pin coupled to one end of the current detection circuit, a second pin, and a third pin. The second pin and the third pin are respectively coupled to a positive end and a negative end of a battery module. The current sense circuit includes a reference voltage generation unit, a voltage dividing unit, and a comparison unit. The reference voltage generation unit is coupled between the second pin and the third pin to generate a reference voltage. The voltage dividing unit has one end coupled to the reference voltage to thereby generate a voltage dividing signal. The comparison unit receives the voltage dividing signal and a current detection signal indicative of a value of a current flowing through the current detection circuit to thereby generate an over-current protection signal when the current is greater than the predetermined current.

Abstract: A non-linear load driving circuit and a controller for controlling a conversion circuit to drive a non-linear load are provided. The controller includes a feedback unit, a pulse width control unit, and an overshoot reduction unit. The feedback unit generates a feedback signal according to a current feedback signal that represents a load current flowing through the non-linear load. The pulse width control unit generates a control signal according to the feedback signal to control a power output of the conversion circuit. The overshoot reduction unit generates an overshoot reduction signal when the load current changes from being smaller than to being greater than a predetermined value according to the current feedback signal. The pulse width control unit receives the overshoot reduction signal and reduces the duty cycle of the control signal accordingly. Thereby, stability of feedback control is improved and damage to circuit is prevented.

Abstract: A power converting controller and an LED driving circuit are provided. The power converting controller controls a converting circuit, which converts an input power source into an appropriate power source to drive a load. The power converting controller includes a feedback control unit, an open-circuit judging unit and a protection unit. The feedback control unit controls the converting circuit according to a feedback signal representing the status of the load. As the open-circuit judging unit has judged that the load is continuously in an open-circuit status for a predetermined time length, the open-circuit judging unit generates an open-circuit protection signal. The protection unit is coupled to the feedback control unit and the open-circuit judging unit so as to generate a protection signal as receiving the open-circuit protection signal and thereby the feedback control unit enters a latch status to stop controlling the converting circuit.

Abstract: The present invention discloses a battery charging controller for achieving a balanced battery charge. The battery charging controller includes a voltage divider, a switch module and a balance circuit. A reference voltage generated by the voltage divide is used to determine which battery unit in a battery module has an insufficient voltage lower than the others, so that the balance circuit controls the switch module to allow a larger current to charge a lower-voltage battery than a higher-voltage battery, so as to result in substantially the same voltage for each fully charged battery of the battery module.

Abstract: A controller which receives electric power required for operating through a driving voltage terminal and controls a converting circuit to convert an input voltage into an output voltage is provided. The controller is latched to stop providing a part or all of functions until the input voltage is removed. Therefore, the issues of the converting circuit in related arts in shortened life-span and safety of users due to can be avoided in the present invention.

Abstract: The present invention discloses a transistor driving module, coupling to a converting controller, to driving a high side transistor and a low side transistor connected in series, wherein one end of the high side transistor is coupled to an input voltage and one end of the low side transistor is grounded. The transistor driving module comprises a high side driving unit, a low side driving unit, a current limiting unit and an anti-short through unit. The high side driving unit generates a high side driving signal to turn the high side transistor on according to a duty cycle signal, and the low side driving unit generates a low side driving signal turn the low side transistor on according to the high side driving signal. The current limiting unit is coupled to the high side transistor and the high side driving unit, and generates a current limiting signal when a current flowing through the high side transistor higher than a current limiting value.