Patent application number | Description | Published |
20100141159 | LED DRIVING CIRCUIT AND CONTROLLER WITH TEMPERATURE COMPENSATION THEREOF - The present invention provides an LED driving circuit with temperature compensation, comprising a power transforming circuit, an LED module and a controller. The transforming circuit receives an electrical power from an input power source and transforms it into an output voltage according to a control signal. The LED module is coupled to the transforming circuit. The controller generates the control signal according to an operation temperature and a voltage feedback signal indicative of the output voltage, and makes the output voltage decrease with increasing operation temperature. Therefore, the LED driving circuit of the present invention has an effect of temperature compensation that compensates the influence of the decreased driving voltage of the LED module due to temperature. | 06-10-2010 |
20100148741 | CONVERTING CIRCUIT AND CONTROLLER FOR CONTROLLING THE SAME - The present invention uses a discharge path to release the power stored in an output capacitor of a converting circuit when the time interval between two adjacent switching thereof is too long and may generate noises whose frequencies can be sensed by human ears. Hence, the present invention can keep the operating frequency of the converting circuit higher than a predetermined frequency and reduce the audio noise of the converting circuit. | 06-17-2010 |
20100201317 | BATTERY CHARGING CONTROLLING APPARATUS AND BATTERY BALANCE CHARGING CONTROLLER - A battery charging controlling apparatus for balancing voltages of the charged batteries is provided. The battery charging controlling includes a battery reference voltage generating unit, a voltage balancing unit, and a balance judging unit. The battery charging controlling apparatus determines whether a battery voltage difference between any two adjacent battery units of a battery module is too large or not by using a reference voltage provided from the battery reference voltage generating unit. The battery charging controlling apparatus further detects the voltage of the battery module and a charging current thereto to determine a suitable time for balancing the charged batteries. Then, the voltage balancing unit controlled by the balance judging unit allows the charging current of the lower-voltage battery unit greater than the charging current of the higher-voltage battery, unit so as to lower the battery voltage difference of the battery units. | 08-12-2010 |
20100315017 | POWER CONVERTING CIRCUIT AND CONTROLLER THEREOF - 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. | 12-16-2010 |
20100327828 | MOSFET CURRENT LIMITING CIRCUIT, LINEAR VOLTAGE REGULATOR AND VOLTAGE CONVERTING CIRCUIT - A MOSFET current limiting circuit, a linear voltage regulator, and a voltage converting circuit are provided. A current limiting value of the MOSFET is adjusted with the temperature or the voltage drop across the drain and the source of the MOSFET. Accordingly, it is ensured that the MOSFET operates in the safe operating area in any situation. Therefore, the MOSFET is prevented from being burnt out, and the reliability thereof is also increased. | 12-30-2010 |
20110037401 | POWER CONVERSION DRIVING CIRCUIT AND FLUORESCENT LAMP DRIVING CIRCUIT - A power conversion driving circuit is provided. The power conversion drive circuit includes a converting circuit, a control circuit and a load circuit. The converting circuit is coupled to an input voltage. The control circuit is coupled to the converting circuit for controlling the converting circuit to convert the input voltage to an output voltage. The load circuit includes a load detecting unit and a load. The load is coupled to the output voltage, and the load detecting unit is coupled to a detecting voltage source. The load detecting unit generates a load detecting signal to re-start the control circuit when the load circuit is inserted into the power conversion driving circuit. | 02-17-2011 |
20110089865 | LOAD DRIVING CIRCUIT AND MULTI-LOAD FEEDBACK CIRCUIT - A load driving circuit and a multi-load feedback circuit is disclosed. The load driving circuit and the multi-load feedback circuit are adapted to drive a LED module that has a current balancing circuit for balancing the currents flowing through LEDs. The load driving circuit and the multi-load feedback circuit modules the electric power transmitted by the LED driving apparatus to a LED module according to voltage level(s) of current balancing terminals having insufficient voltage in the current balancing circuit, and so the voltage levels of the current balancing terminals are higher than or equal to a preset voltage level, further increasing the efficiency thereof. | 04-21-2011 |
20110109231 | LED CURRENT CONTROL CIRCUIT, CURRENT BALANCER AND DRIVING APPARATUS - An LED current control circuit including a current adjusting unit, a detecting unit, and a current control unit is provided. The current adjusting unit has a current control end coupled to an LED string for determining an amount of current flowing through the LED string according to a current control signal. The detecting unit detects the current control end and determines whether to generate a protecting signal according to a protecting voltage value. The current control unit generates the current control signal to control the amount of current flowing through the LED string of and determines whether to stop the current flowing through the LED string according to the protecting signal. | 05-12-2011 |
20110109268 | BATTERY VOLTAGE BALANCE APPARATUS AND BATTERY CHARGE APPARATUS - A battery voltage balance apparatus including a balance determining unit and a converting unit is provided. The balance determining unit is coupled to a plurality of battery units and determines whether to perform a battery voltage balance process according to battery voltages of each battery units. The converting unit has an energy storage circuit and is coupled to the battery units. In the battery voltage balance process, the converting unit stores energy in the energy storage circuit and selectively charging at least one of the battery units by the energy storage circuit, so that the voltage differences between any two of the battery units are reduced to be lower than a predetermined value or a predetermined percentage. | 05-12-2011 |
20110109288 | POWER CONVERTING CIRCUIT - A power converting circuit including a converting circuit and a controller is provided. In an embodiemnt of the invention, the inductance of the converting circuit and the operation frequency of the controller can be adjusted according to the power required by the load and/or the size of the inductor current to effectively reduce the switching times and the switching loss of the switch in the converting circuit when the load is light. Accordingly, no matter the load is light or heavy, the efficiency of the power converting circuit can be maintained at a higher standard. | 05-12-2011 |
20110210682 | LED DRIVING CIRCUIT AND POWER CONVERTING CIRCUIT - A power converting circuit having the function of circuit detecting is provided. The power converting circuit has a transistor, a controller and a detecting circuit. The transistor receives an input voltage. The controller is coupled to a control end of the transistor to control the conducting state of the transistor so as to stabilize the output of the power converting circuit. The detecting circuit detects at least one of the control end and the low voltage end of the transistor, and generates a state signal when the detected voltage of any one of the control end and the low voltage end does not fall within a corresponding predetermined voltage range. The state signal is utilized for stopping a power circuit which provides the input voltage providing the input voltage. In addition, a light emitting diode driving circuit having the function of circuit detecting is also provided. | 09-01-2011 |
20110215780 | DE-GLITCH SWITCHING CONVERTING CIRCUIT AND CONTROLLER THEREOF - A de-glitch switching converting circuit and a controller thereof are provided. In the embodiment of the invention, the circuit can filter noises with high frequency by way of time judgment, so as to avoid the erroneous operation of the controller affecting the stability of the output voltage or the output current. Compared with the method of using low-pass filters with large capacitors to filter noises, highly increasing the cost of the circuit is unnecessary in the embodiment of the invention. The circuit in the embodiment of the invention also has the capability for filtering noises with high amplitudes. In addition, by setting suitable parameters, the circuit in the embodiment of the invention can also avoid affecting the transient response of the circuit while filtering noises. | 09-08-2011 |
20110248675 | BATTERY VOLTAGE BALANCE APPARATUS AND BATTERY CHARGE APPARATUS - In the related art, the measurement error due to the internal resistance of the battery is not considered in the battery balance method, such that the battery balance is not accurate, or the battery balance process is frequently started and stopped. In exemplary embodiments of the invention, detecting battery voltage and balancing battery voltage are performed in different time, such that the difference of charge current/discharge current among the batteries due to the battery voltage balance process do not affect the battery voltage detecting. | 10-13-2011 |
20110279061 | FEEDBACK CONTROL CIRCUIT AND POWER CONVERTING CIRCUIT - An exemplary embodiment of the invention provides a set of an initial value of an error amplifying signal in the feedback control circuit for feedback control, so as to reduce the time and the amplitude of oscillation of the error amplifying signal. Accordingly, a feedback control circuit and a power converting circuit provided in an exemplary embodiment of the invention not only reduce the degree and the time of overshoot but also provide accurate and stable feedback control. | 11-17-2011 |
20110279103 | POWER CONVERTER AND PULSE WIDTH MODULATION SIGNAL CONTROLLING APPARATUS THEREOF - A pulse width modulation signal controlling apparatus including a signal pin, a core circuit, a setting judging circuit, a signal adjusting and selecting circuit, and a timer circuit is disclosed. The signal pin is connected to a setting device for receiving an external input signal. The setting judging circuit receives and compares a setting signal with a reference value to generate a setting judgment result. The signal adjusting and selecting circuit couples the signal pin to the setting judging circuit and adjusts the external input signal into the setting signal according to the setting device in a first state, and couples the signal pin to the core circuit in a second state. The timer circuit controls the state of the signal adjusting and selecting circuit, wherein the timer circuit sets the signal adjusting and selecting circuit in the first state during a predetermined time period. | 11-17-2011 |