Patent application number | Description | Published |
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 |
20080309245 | SYSTEM AND METHOD FOR ANALOG VOLTAGE PROCESSING IN WIDE RANGE FOR COLD-CATHODE FLUORESCENT LAMP - System and method for processing analog voltage for cold-cathode fluorescent lamp. The system includes a voltage-to-current converter configured to receive an input analog voltage signal and generate a first current signal, and a current processing component configured to receive the first current signal and a predetermined current and generate a second current signal. Additionally, the system includes a current-to-voltage converter configured to receive the second current signal and generate an output analog voltage signal, and a dimming controller configured to receive the output analog voltage signal and generate a control signal for driving at least a cold-cathode fluorescent lamp. The voltage-to-current converter, the current processing component, and the current-to-voltage converter are configured to be biased between a first power supply voltage level and a second power supply voltage level. | 12-18-2008 |
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 |
20090206814 | METHOD AND SYSTEM FOR EFFICIENT POWER CONTROL WITH MULTIPLE MODES - Method and system for efficient power control with multiple modes. According to an embodiment, the present invention provides a power system with selectable power modes. The power system includes a first terminal for outputting energy, and the first terminal is electrically coupled to a load. The system also includes a pulse-frequency modulation (PFM) component that is configured to adjust a pulse frequency based on the load. The system additionally includes a pulse-width modulation (PWM) component that is configured to adjust a pulse width based on the load. The system further includes a switch that is electrically coupled to the first terminal. Also, the system includes a control component, the control component being configured to provide a control signal that is capable of causing the switch to be turned on or off. The control signal is associated with an output of the PWM component and the pulse width if an output is greater than a predetermined value. The control signal is associated with an output of the PFM component and the pulse frequency if an output is lower than a predetermined value. | 08-20-2009 |
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 |
20110051472 | METHOD AND SYSTEM FOR EFFICIENT POWER CONTROL WITH MULTIPLE MODES - Method and system for efficient power control with multiple modes. According to an embodiment, the present invention provides a power system with selectable power modes. The power system includes a first terminal for outputting energy, and the first terminal is electrically coupled to a load. The system also includes a pulse-frequency modulation (PFM) component that is configured to adjust a pulse frequency based on the load. The system additionally includes a pulse-width modulation (PWM) component that is configured to adjust a pulse width based on the load. The system further includes a switch that is electrically coupled to the first terminal. Also, the system includes a control component, the control component being configured to provide a control signal that is capable of causing the switch to be turned on or off. The control signal is associated with an output of the PWM component and the pulse width if an output is greater than a predetermined value. The control signal is associated with an output of the PFM component and the pulse frequency if an output is lower than a predetermined value. | 03-03-2011 |
20110204865 | SYSTEM AND METHOD FOR ADAPTIVE SWITCHING FREQUENCY CONTROL - System and method for providing frequency control to a power converter. The system includes a controller configured to receive a load signal and generate a first control signal. The load signal indicates an output load for a power converter. Additionally, the system includes a signal generator configured to receive the first control signal and generates at least a first output signal. The first output signal is associated with a first signal strength and a first frequency. The first frequency is inversely proportional to a sum of a first time period, a second time period, and a third time period. The first signal strength increases with the time during the first time period, the first signal strength decreases with the time during the second time period, and the first signal strength is constant with respect to the time during the third time period. | 08-25-2011 |
20110292694 | 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. | 12-01-2011 |