| Patent application number | Description | Published |
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| 20080197895 | SYSTEM AND METHOD FOR POWER ON RESET AND UNDER VOLTAGE LOCKOUT SCHEMES - A system and method for power-on reset and under-voltage lockout schemes. The system includes a first transistor, which includes a first gate, a first terminal, and a second terminal, the second terminal being biased to a predetermined voltage. The system includes a second transistor, which include a second gate, a third terminal, and a fourth terminal, the third terminal being configured to receive an input voltage. The system includes a first resistor that is associated with a first resistance. The first resistor includes a fifth terminal and a sixth terminal, the fifth terminal being configured to receive the input voltage. The system includes a second resistor that is associated with a second resistance. The second resistor includes a seventh terminal and an eighth terminal, the seventh terminal being coupled to the sixth terminal. The system includes a first Zener diode that is associated with a first Zener voltage. | 08-21-2008 |
| 20080212248 | Adaptive multi-level threshold system and method for power converter protection - System and method for protecting a power converter. The system includes a compensation system configured to receive an input signal and generate a control signal, a cycle threshold generator configured to receive the control signal and generate a cycle threshold, and a comparator configured to receive the cycle threshold and a feedback signal and generate a comparison signal. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and control an input current for a power converter. The input current is associated with an output power for the power converter. The cycle threshold corresponds to a threshold power level for the output power. The threshold power level is constant, decreases, or increases with respect to the input signal. | 09-04-2008 |
| 20080224749 | SYSTEM AND METHOD FOR PROVIDING STABLE CONTROL FOR POWER SYSTEMS - System and method for providing stable control for power systems. According to an embodiment, the present invention provides an apparatus for providing one or more control signals for a power system. The apparatus includes an input terminal for receiving an electrical energy, which can be characterized by a first input voltage. The apparatus includes a control component that is configured to generate a first control signal based on at least information associated with the first input voltage. The apparatus additionally includes an output terminal for sending the first control signal. Moreover, the apparatus includes a timing component that is coupled to the control component. The control component is configured to process at least information associated with a first value of the first input voltage at a first time and a first reference voltage and to generate a second control signal. | 09-18-2008 |
| 20080238375 | SYSTEMS AND METHODS FOR REDUCING EMI IN SWITCH MODE CONVERTER SYSTEMS - Switch mode power converter system and method thereof. The system includes one or more isolation boxes including at least a first isolation box, an input primary winding for receiving an input signal for the switch mode power converter system, and an output secondary winding for generating an output signal for the switch mode power converter system. The switch mode power converter system is configured to convert the input signal to the output signal. One of the input primary winding and the output secondary winding is substantially enclosed in the first isolation box, and the other of the input primary winding and the output secondary winding is not enclosed in the first isolation box. The first isolation box is conductively connected to a constant-voltage source. | 10-02-2008 |
| 20080246418 | DRIVER SYSTEM AND METHOD WITH MULTI-FUNCTION PROTECTION FOR COLD-CATHODE FLUORESCENT LAMP AND EXTERNAL-ELECTRODE FLUORESCENT LAMP - System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, convert the DC input voltage to an AC output voltage, and send the AC output voltage to a cold-cathode fluorescent lamp. If the DC input voltage is lower than a predetermined threshold, the system for driving the cold-cathode fluorescent lamp is turned off in response to the one or more control signals. | 10-09-2008 |
| 20080246444 | SYSTEM AND METHOD FOR POWER CONTROLLER - System and method for power controller. According to an embodiment, the present invention provides a power factor correction apparatus. The apparatus includes a multiplier component that is configured to process a first input signal and a second input signal. For example, the first input signal is associated with a rectified alternating current signal, and the second input signal is associated with an error signal. The multiplier component further is configured to generate a first output signal based on the first input signal and the second input signal. The apparatus also includes a comparator component that is configured to process a third input signal and fourth input signal. The third input signal is associated with the first output signal. The comparator component is further configured to generate a second output signal based on the third input signal and the fourth input signal. | 10-09-2008 |
| 20090067204 | SYSTEM AND METHOD FOR PROVIDING CONTROL FOR SWITCH-MODE POWER SUPPLY - System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first voltage and a second voltage, to process information associated with the first voltage and the second voltage, to determine a signal based on at least information associated with the first voltage and the second voltage, and to send the signal to a switch for a power converter. The switch is regulated based on at least information associated with the signal. The signal processing component is further configured to determine the signal to be associated a first mode, if the first voltage is higher than a first threshold. | 03-12-2009 |
| 20090212756 | SYSTEM AND METHOD FOR POWER CONTROLLER - System and method for power controller. According to an embodiment, the present invention provides a power factor correction apparatus. The apparatus includes a multiplier component that is configured to process a first input signal and a second input signal. For example, the first input signal is associated with a rectified alternating current signal, and the second input signal is associated with an error signal. The multiplier component further is configured to generate a first output signal based on the first input signal and the second input signal. The apparatus also includes a comparator component that is configured to process a third input signal and fourth input signal. The third input signal is associated with the first output signal. The comparator component is further configured to generate a second output signal based on the third input signal and the fourth input signal. | 08-27-2009 |
| 20090213507 | SYSTEM AND METHOD OF ELECTROSTATIC DISCHARGE PROTECTION FOR SIGNALS AT VARIOUS VOLTAGES - System and method for protecting an integrated circuit. The system includes a first transistor coupled to a first voltage and a second voltage, a second transistor coupled to the gate of the first transistor and the first voltage, a third transistor coupled to the gate of the second transistor and the first voltage, and a capacitor coupled to the gate of the second transistor and the second voltage. The first voltage is provided to the integrated circuit, the gate of the third transistor is configured to receive a first control signal, the gate of the second transistor is configured to receive a second control signal, and the second control signal is capable of turning off the second transistor a time period after the third transistor is turned off. | 08-27-2009 |
| 20100165675 | SYSTEM AND METHOD FOR CONTROLLING VARIATIONS OF SWITCHING FREQUENCY - System and method for providing frequency control to a power converter. The system includes a pseudorandom signal generator configured to generate a digital signal. The digital signal is associated with at least an N-bit datum, and N is a positive integer. Additionally, the system includes a digital-to-analog converter configured to receive the digital signal and generate a first control signal, an output signal generator configured to receive the first control signal and generate at least a first output signal associated with a frequency, and a pulse-width-modulation generator configured to receive at least the first output signal. The N-bit datum represents a pseudorandom number. | 07-01-2010 |
| 20100172160 | SYSTEM AND METHOD FOR PROVIDING CONTROL FOR SWITCH-MODE POWER SUPPLY - System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first voltage and a second voltage, to process information associated with the first voltage and the second voltage, to determine a signal based on at least information associated with the first voltage and the second voltage, and to send the signal to a switch for a power converter. The switch is regulated based on at least information associated with the signal. The signal processing component is further configured to determine the signal to be associated a first mode, if the first voltage is higher than a first threshold. | 07-08-2010 |
| 20100219802 | QUASI-RESONANT SYSTEMS AND METHODS WITH MULTI-MODE CONTROL - Switch-mode power conversion system and method thereof. The switch-mode power conversion system includes a primary winding configured to receive an input voltage, and a secondary winding coupled to the primary winding and configured to, with one or more other components, generate an output signal. Additionally, the switch-mode power conversion system includes a feedback component configured to receive the output signal and generate a feedback signal based on at least information associated with the output signal, and a voltage detector configured to receive the input voltage and output a detection signal. Moreover, the switch-mode power conversion system includes a mode controller configured to receive the detection signal and the feedback signal and generate a switch signal based on at least information associated with the detection signal and the feedback signal, and a switch configured to receive the switch signal and affect a first current flowing through the primary winding. | 09-02-2010 |
| 20110068705 | DRIVER SYSTEM AND METHOD WITH MULTI-FUNCTION PROTECTION FOR COLD-CATHODE FLUORESCENT LAMP AND EXTERNAL-ELECTRODE FLUORESCENT LAMP - System and method for driving a cold-cathode fluorescent lamp. The system includes a control subsystem configured to generate one or more control signals, and a power supply subsystem configured to receive the one or more control signals and a DC input voltage, convert the DC input voltage to an AC output voltage, and send the AC output voltage to a cold-cathode fluorescent lamp. If the DC input voltage is lower than a predetermined threshold, the system for driving the cold-cathode fluorescent lamp is turned off in response to the one or more control signals. | 03-24-2011 |
