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Chien-Ping Lu
Chien-Ping Lu, Hsinchu County TW
| Patent application number | Description | Published |
|---|---|---|
| 20110050192 | METHODS FOR LIGHT LOAD EFFICIENCY IMPROVEMENT OF A BUCK BOOST VOLTAGE REGULATOR - Methods are proposed for a buck boost voltage regulator to monitor the output voltage or both the inductor current and the output voltage of the buck boost voltage regulator to control the buck boost voltage regulator to reduce the switching times of the power switches of the buck boost voltage regulator to improve the light load efficiency of the buck boost voltage regulator. | 03-03-2011 |
Chien-Ping Lu, Tainan City TW
| Patent application number | Description | Published |
|---|---|---|
| 20100019682 | LED driver and controller thereof - A LED driver is disclosed for providing a current for LED lighting. The LED driver includes an inductor and a controller having a power switch, and the inductor, the power switch and a LED to be driven are configured to be an asynchronous boost converter. Because the driven LED serves as a rectifier diode of the asynchronous boost converter, the controller may have fewer components and requires smaller die area. | 01-28-2010 |
| 20100066312 | Overvoltage protection circuit for use in charger circuit system and charge circuit with overvoltage protection function - The present invention discloses an overvoltage protection (OVP) circuit for use in a charger circuit system, comprising: a power transistor electrically connected between a voltage supply and a battery; an OVP circuit which turns off the transistor when a voltage supply exceeds a threshold value; and a multiplexing circuit electrically connected between an output of the OVP circuit and the gate of the transistor. The present invention also discloses a charger circuit with an OVP function, comprising: a single power transistor electrically connected between a voltage supply and a battery; an OVP control circuit which turns off the power transistor when a voltage supply exceeds a threshold value; and a charger control circuit which controls the gate of the power transistor to determine a charge current to the battery when the voltage supply does not reach the threshold value. | 03-18-2010 |
| 20100072915 | Boost driver circuit with fast discharging function - The present invention discloses a boost driver circuit which converts an input voltage to an output voltage and supplies it to a load, the boost driver circuit comprising: a power transistor electrically connected with a node between the input voltage and the output voltage; a pulse width modulation driver circuit for controlling the operation of the power transistor; an output node electrically connected with the output voltage; a feedback node electrically connected with the load; a low voltage transistor electrically connected with the feedback node; and a clamp and fast discharge circuit electrically connected with the feedback node for discharging the feedback node when the voltage at the feedback node is higher than a predetermined voltage. | 03-25-2010 |
| 20110001461 | Buck-boost switching regulator and control circuit and method therefor - The present invention discloses a buck-boost switching regulator, and a control circuit and a method therefor, to convert an input voltage to an output voltage. The control method comprises: obtaining a feedback signal relating to the output voltage; comparing the feedback signal with a reference voltage to generate an error amplified signal; when the error amplified signal is between a first voltage (V | 01-06-2011 |
Chien-Ping Lu, Jhubei City TW
| Patent application number | Description | Published |
|---|---|---|
| 20080246455 | Adaptive zero current sense apparatus and method for a switching regulator - A switching regulator includes a low-side switch having a body diode. During the low-side switch is on, a zero-current sense circuit monitors the inductor current of the switching regulator and triggers a signal to turn off the low-side switch when the inductor current falls down to a zero-current threshold, to prevent reverse inductor current from the output terminal of the switching regulator. A body-diode turn-on time controller monitors the turn-on time of the body diode and adjusts the zero-current threshold according thereto, and the turn-on time of the body diode can be reduced to an optimal interval subsequently. The self-adjustable zero-current threshold is adaptive according to the application conditions, such as the inductor size, input voltage and output voltage of the switching regulator. | 10-09-2008 |
| 20100052629 | Adaptive zero current sense apparatus and method for a switching regulator - A switching regulator includes a low-side switch having a body diode. During the low-side switch is on, a zero-current sense circuit monitors the inductor current of the switching regulator and triggers a signal to turn off the low-side switch when the inductor current falls down to a zero-current threshold, to prevent reverse inductor current from the output terminal of the switching regulator. A body-diode turn-on time controller monitors the turn-on time of the body diode and adjusts the zero-current threshold according thereto, and the turn-on time of the body diode can be reduced to an optimal interval subsequently. The self-adjustable zero-current threshold is adaptive according to the application conditions, such as the inductor size, input voltage and output voltage of the switching regulator. | 03-04-2010 |
Chien-Ping Lu, Cupertino, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100031071 | Platform-Based Idle-Time Processing - A system and method for transitions a computing system between operating modes that have different power consumption characteristics. When a system management unit (SMU) determines that the computing system is in a low activity state, the SMU transitions the central processing unit (CPU) into a low power operating mode after the CPU stores critical operating state of the CPU in a memory. The SMU then intercepts and processes interrupts intended for the CPU, modifying a copy of the critical operating state. This effectively extends the time during which the CPU stays in lower power mode. When the SMU determines that the computing system exits a low activity state, the copy of the critical operating state is stored in the memory and the SMU transitions the CPU into a high power operating mode using the modified critical operating state. | 02-04-2010 |
Chien-Ping Lu, Tainan TW
| Patent application number | Description | Published |
|---|---|---|
| 20090212841 | LEVEL SHIFT CIRCUIT AND METHOD FOR THE SAME - The present invention discloses a level shift circuit which comprises: an input driver circuit; a capacitor having a first end electrically connected with the output of the input driver circuit; an output driver circuit electrically connected with a second end of the capacitor; and a feedback latch circuit electrically connected between the output of the output driver circuit and the second end of the capacitor, for maintaining the voltage level at the second end of the capacitor. | 08-27-2009 |
Chien-Ping Lu, Chupei City TW
| Patent application number | Description | Published |
|---|---|---|
| 20080211470 | Auto discharge linear regulator and method for the same - The present invention discloses an auto discharge linear regulator comprising: a basic linear regulator for converting an input voltage to an output voltage at an output node; a load detector circuit for detecting the load condition at the output node; and an discharge control circuit under control by the load detector circuit for discharging the voltage at the output node. | 09-04-2008 |