Richtek Technology Corporation

Mediatek Corporation

Richtek Technology Corporation, R.o.c

Other

Mediateck Inc.

Nien-Hui Kung

Kwan-Jen Chu

Li-Wei Lee

Tzu-Huan Chiu

Chien-Ping Lu

Shui-Mu Lin

Wei-Hsin Wei

Jien-Sheng Chen

Der-Jiunn Wang

Ying-Hsin Hsing

Jing-Meng Liu

Yen-Hsun Hsu

Chao-Hsuan Chuang

Chun-Tsung Chen

Hsuan-Kai Wang

Tsung-Wei Huang

Chia-Hsiang Lin

Yiu-I Lin

Chih-Wei Lin

An-Tung Chen

Chien-Wei Kuan

Chia-Hua Chou

Wei-Chung Chang

Chien-Sheng Chen

Kuo-Chang Lo

Ko-Ching Su

Wen-Hung Huang

Chen-Hsiang Hsiao

Wei-I Li

A low dropout regulator that produces an output includes a comparison circuit, configured to compare a signal representative of the output and a reference signal to produce a comparison result. The low dropout regulator also includes a loop controller, coupled to the comparison circuit, configured to generate an output circuit control signal based at least in part on the comparison result. The low dropout regulator also includes an output circuit, comprising two or more output stages, configured to adjust a number of active output stages of the two or more output stages based on the output circuit control signal.

Asynchronous low dropout regulator

An apparatus for performing resistance control on a current sensing component in an electronic device and an associated method are provided. For example, the apparatus may comprise a power switching unit and a feedback module, and the power switching unit is utilized as the current sensing component when the power switching unit enables the power path. The feedback module may comprise: a power switching unit replica that receives a first voltage at the battery terminal and outputs a second voltage; a first current source, coupled between the power switching unit replica and a ground terminal, arranged to receive the second voltage; a reference voltage generator that generates a third voltage; and an error amplifier that receives the second voltage and the third voltage and outputs a fourth voltage, wherein the feedback module controls both of the power switching unit and the power switching unit replica according to the fourth voltage.

Apparatus for performing resistance control on a current sensing component in an electronic device, and associated method

An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip. For example, the charger may include: a plurality of terminals that are positioned on the charger chip, where the plurality of terminals may include a third terminal and a fourth terminal; a plurality of switching units, positioned on the charger chip; and a control circuit, positioned on the charger chip and coupled to the plurality of switching units. The third terminal and the fourth terminal may be arranged for installing an inductor, where the inductor may be utilized by the charger when the control circuit configures the charger into any of at least two hardware configurations within a plurality of hardware configurations.

Apparatus for performing hybrid power control in an electronic device with aid of multiple switches corresponding multi-purpose usage

An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip. For example, the charger may include: a first terminal, positioned on the charger chip; a second terminal, positioned on the charger chip and selectively coupled to the first terminal; a third terminal, positioned on the charger chip and selectively coupled to the second terminal; a fourth terminal, positioned on the charger chip and coupled to the third terminal; a first power output path, coupled to the fourth terminal, arranged for providing a first voltage level; and a second power output path, coupled to the third terminal, arranged for selectively providing a second voltage level that is greater than the first voltage level.

Apparatus for performing hybrid power control in an electronic device with aid of separated power output nodes for multi-purpose usage of boost

A method and apparatus for performing adaptive input current control in an electronic device are provided, where the method may include the steps of: before limiting an input current of a regulator of the electronic device to a target current value, monitoring the input current of the regulator according to a reference current, and decreasing the reference current, to make the reference current change starting from one of a plurality of predetermined reference current values, wherein the input current is obtained from a power source; detecting an input voltage of the regulator to generate a detection signal, to selectively trigger limiting output power of the regulator; and at a time point when the reference current becomes smaller than the input current, limiting the input current of the regulator to the target current value with a latest reference current value of the reference current being utilized as the target current value.

Method for performing adaptive input current control in an electronic device with aid of adaptor management, and associated apparatus

An apparatus for performing hybrid power control in an electronic device includes a charger positioned in the electronic device, and the charger is arranged for selectively charging a battery of the electronic device. In addition, at least one portion of the charger is implemented within a charger chip, and the charger may include: a plurality of terminals that are positioned on the charger chip; a plurality of switching units, positioned on the charger chip; and at least one control circuit, positioned on the charger chip and coupled to the plurality of switching units. For example, the control circuit may be arranged for controlling the plurality of switching units to allow charging using any of a plurality of adaptors corresponding to different voltages, wherein a first charging path and a second charging path of the charger correspond to a first adaptor and a second adaptor within the plurality of adaptors, respectively.

Apparatus for performing hybrid power control in an electronic device to allow charging using any of high power adaptors corresponding to different voltages

An apparatus for performing level shift control in an electronic device includes an input stage positioned in a level shifter of the electronic device, and an output stage positioned in the level shifter and coupled to the input stage through a set of intermediate nodes. The input stage is arranged for receiving at least one input signal of the level shifter through at least one input terminal of the input stage and controlling voltage levels of the set of intermediate nodes according to the at least one input signal. The input stage includes a hybrid current control circuit coupled to the at least one input terminal and arranged for performing current control for the input stage. The hybrid current control circuit is equipped with multiple sets of parallel paths for controlling currents passing through the set of intermediate nodes, respectively, each set may include two or more paths in parallel.

Apparatus for performing level shift control in an electronic device with aid of parallel paths controlled by different control signals for current control purposes

An apparatus for performing multi-loop power control in an electronic device is provided, where the apparatus may include at least one portion (e.g. a portion or all) of the electronic device. More particularly, the apparatus may include a first amplifier that is positioned in a first feedback loop of the electronic device and coupled to a power control terminal of the electronic device, and a second amplifier that is positioned in a second feedback loop of the electronic device and coupled to the power control terminal. For example, the apparatus may further include a compensation circuit that is coupled to the first amplifier and the second amplifier. In another example, the apparatus may further include a selection control circuit that is coupled to the first amplifier and the second amplifier. An associated method such as an operational method of the above apparatus is also provided.

Apparatus for performing multi-loop power control in an electronic device with aid of analog compensation and duty cycle selection, and associated method

The present invention discloses a power management circuit, and a control circuit and a control method thereof. The power management circuit converts an input voltage at an input terminal to an output voltage at an output terminal, and charges a battery from the output terminal. The present invention detects a power supplying capability of the input terminal to generate an adjustment signal, and adjusts the output voltage according to the adjustment signal.

Power management circuit, and control circuit and control method thereof

The present invention discloses a bi-directional switching regulator and a control circuit of the bi-directional switching regulator. The bi-directional switching regulator includes a power stage, an operation circuit, and a power path management circuit. The operation circuit generates a first operation signal to control a boost conversion operation or a buck conversion operation of the power stage. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, for controlling a charging operation from the output terminal to the battery. The operation circuit generates the first operation signal so that: (1) the output voltage is determined by a sum of a safety offset and the battery voltage; or (2) the output voltage is determined by a higher one between a predetermined voltage level and the sum of the safety offset and the battery voltage.

Bi-directional switching regulator and control circuit thereof

The present invention discloses a method for controlling a voltage regulator, including steps of: converting an input voltage to an output voltage and providing an output current; sensing the output current; reducing the output voltage; and when the reduction of the output voltage causes the output current to change, setting the output voltage back to a value which does not change the output current.

Voltage regulator, and control circuit and control method thereof

The present invention discloses a bi-directional switching regulator and a control circuit thereof. The bi-directional switching regulator includes a power stage, an operation circuit controlling the power stage, and a power path management circuit. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, and a power path controller controlling the power path switch. The operation circuit generates the operation signal according to the output voltage or a battery voltage of the battery, and the charging current, so that: (1) a voltage difference between the output voltage and the battery voltage is ICHG*R, wherein ICHG represents the charging current and R represents a conduction resistance when the power path switch is fully conductive; or (2) the output voltage is determined by a higher one of a predetermined voltage level and the sum of ICHG*R plus the battery voltage.

The present invention discloses a power bank circuit. The power bank circuit includes a charger circuit, a battery circuit, a power conversion circuit, a temperature detecting circuit and a current distribution circuit. The charger circuit receives an input voltage and provides a charging current to the battery circuit. The power conversion circuit converts a battery voltage to an output voltage and provides an output current. The temperature detecting circuit detects the temperature of the packaged structure. When the temperature of the packaged structure exceeds a first predetermined temperature, the current distribution circuit first reduces the output current. When the temperature of the packaged structure exceeds a second predetermined temperature, the current distribution circuit then reduces the charging current.

Growing community of inventors

Hsinchu, Taiwan

Nien-Hui Kung