Inno-tech Co., Ltd.

Shu-Chia Lin

Wen-Yueh Hsieh

Ching-Yuan Lin

Chih Feng Lin

Chih-Feng Lin

Tsu-Huai Chan

Ting-Chin Tsen

Chih-Liang Wang

Yi-Pin Chen

Chin-Chuan Chen

Ching-Sheng Yu

Kuo-Jung Wu

The present invention discloses a power converter controller having a short-circuit protection threshold voltage no higher than an over-current protection threshold voltage so that any abnormal voltage or current stress on semiconductor components can be timely sensed via a current sense pin in the event of a short-circuit fault, effectively preventing semiconductor components from being damaged.

Power converter controller having a short-circuit protection threshold voltage no higher than an over-current protection threshold voltage

Disclosed is a variable-frequency power controller. The controller includes a power pin, a ground pin, a driving pin, a voltage sensing pin, and a loading voltage sensing pin, and is in collocation with a rectification unit, an inductor unit, a switch unit, an output unit, a voltage sensing unit, and a loading voltage sensing unit to implement a variable-frequency power control of power conversion. The controller performs one of the burst mode, valley switch mode, quasi-resonance (QR) mode, conduction mode, and peak loading mode based on a wide range of loading level. In particular, the loading level covered by the present invention includes the ultra-light, light, middle, full, and over-heavy loading, and the features of power saving, low switching loss, operation safety are thus achieved. Further, any over design employed to meet the wide range of loading level is prevented.

Variable-frequency power controller

Disclosed is a method of controlling a time parameter performed by a power controller having a power pin, a ground pin, a driving pin, a time parameter selecting pin, a feedback pin, and a current sensing pin. The power controller is in collocation with a rectification unit, a transformer, a switch unit, a power output unit, and a feedback unit. A Pulse Width Modulation (PWM) frequency of a driving signal, an Over-Voltage Protection (OVP) delay time, and an Under-Voltage Protection (UVP) delay time are preset in the power controller. An external time parameter selecting signal is received through the time parameter selecting pin to dynamically update the PWM frequency, the OVP delay time, or the UVP delay time, thereby greatly increasing efficiency of power conversion and avoiding malfunction of OVP or UVP.

Method of controlling time parameter

Disclosed is a dynamic multi-functional power controller in collocation with a primary side coil, a switching unit, and a current sensing resistor, performing a power control process. An induced current is generated by a secondary side coil coupled with the primary side coil through electromagnetic interaction with a conduction current flowing through the primary side coil, and an output power is generated to supply an external load when the induced current flows through an output rectification unit and an output filter unit. The power control process includes detecting if any abnormal state occurs, stopping a driving signal, waiting for a period of time, and then re-sending the driving signal. Thus, the present invention provides protection for various kinds of peak loading, avoids high power state when an abnormal state is not resolved, and further reduces the average output power, thereby implementing power saving.

Dynamic mult-functional power controller

Disclosed is a dynamic regulation power controller having a work voltage input pin, a feedback voltage input pin, a driving voltage output pin, a current sensing input pin, and a regulation power input pin, and being in collocation with a switching unit, an input power processing unit, a transformer, a current sensing resistor, a power regulation unit, an output rectification unit, and an output capacitor for converting an input AC voltage into an output voltage for supplying a load. In particular, the driving voltage and the driving current are dynamically adjusted according to the feedback voltage and the current sensing signal, thereby greatly increasing efficiency of power conversion and Electromagnetic Interference (EMI).

Dynamic regulation power controller

A power controller in collocation with a rectification unit, a transformer, a switching unit, a current sensing resistor, an output rectification unit, and an output capacitor is disclosed, and includes a working voltage pin, a ground pin, a PWM driving pin, a current sensing pin, and a load feedback pin for converting an external AC input power into an output power to supply a load. In particular, the power controller simultaneously performs active detection on load power to provide overload protection. Specifically, a load feedback signal related to a load power and a threshold load voltage representative of a preset threshold load power is compared, and a power counter representative of a calculated load power is increased by one, decreased by one, or kept without change according to the comparison result. Then, the power counter is employed to determine whether an overload abnormal event occurs.

Power controller of load power detection

Disclosed is a power control device suitably applied to the field of driving a microelectronic element like MOSFET. Based on Miller plateau voltage of the microelectronic element such as MOSFET, the power control device can dynamically adjust driving capability and set a driving voltage so as to control and balance turn-on loss and switch loss, and further achieve an optimal average efficiency, particularly, for selecting or replacing the microelectronic element like MOSFET. Also, an electronic system provided with the power control device effectively solves the problem of Electromagnetic Interference (EMI) imposed on peripheral devices.

Power control device

Disclosed is a method of acquiring input and output voltage information by employing a pulse width modulation (PWM) controller, which is in collocation with an input power processing unit, a primary inductor, a switch element, a current-sensing resistor, an output rectifier, and an output filter for converting an alternating current input power into an rectified input power and an output power, and the output power supplies an external load. A current-sensing signal is specifically disposed and applied to calculation of the input voltage and output voltage of the rectified input power when the switch element is turned on and off, respectively. Thus, no resistive voltage divider is needed, and power consumption at no load is greatly improved.

Method of acquiring input and output voltage information

Disclosed is an integrated PFC and PWM controller with a plurality of frequency-load curves to minimize the no-load power consumption and maximize 4-point average efficiencies. The controller selects a frequency-load curve among the plurality of frequency-load and controls the PFC stage and the PWM stage to operate in HM, BM, DCM, or CCM based on the combined result from the input voltage and the output load sense signal, fetched respectively from the input terminal of the PFC stage and the output terminal of the PWM stage. The controller has the PSU operate in HM in case of no load, and operate in BM, DCM or CCM as the load increases across the flyback out rail.

Integrated PFC and PWM controller with a plurality of frequency-load curves

Disclosed is a PWM controller with programmable switching frequency for PSR/SSR flyback converter so as to maximize the performance-to-cost ratio by tailor-making the switching frequency as a non-decreasing function of the output load and the maximum switching frequency as a non-increasing function of the input voltage, leading to a plurality of programmable voltage-dependent frequency-load curves, making possible the downsizing of flyback transformer while facilitating the simultaneous compliance with DoE and CoC efficiency requirements.

PWM controller with programmable switching frequency for PSR/SSR flyback converter

Disclosed is an isolated power conversion system for providing a function of isolated power conversion by converting an AC power into a DC output power, and a rectifying unit, a transformer, a switching transistor, a first pulse width modulation (PWM) controller, a second PWM controller, an output unit and a signal blocking unit are included. The signal blocking unit is employed as a connection interface between the first and second PWM controllers to provide digital signal for communication. Noise margin and stability of electrical operation are improved to avoid malfunction. Overall, the present invention greatly enhances stability of power conversion and secures quality of electrical signal.

Isolated power conversion system

A multifunction power conversion device for dynamical detection includes an input filter unit, a transformer, a switching transistor, a driving controller, a feedback unit and an output unit. Two sensing signals from the primary and auxiliary coils of the transformer form a current sensing zero detection signal. The digital control unit of the driving controller determines if a current flowing through a secondary coil of the transformer is reduced to zero due to discharging, and further finds valley of the current of the secondary coil. The switching transistor is turned on after a preset number of the valley and then turned off by a process of current sense. Therefore, the present invention greatly reduces switching loss, increases efficiency of power conversion, and particular, enhances flexibility of application to meet actual requirements by simply updating program executed by the digital control unit.

Multifunction power conversion device

A power supply and a method of power supplying for converting an external alternating power into an output power with appropriate voltage and power are disclosed. The power supply includes an input charging unit, an input filtering unit, a regulating unit, a transformer, a controller, an output unit, an output capacitor, a switching unit and a feedback unit. The regulating unit is connected to the input filtering unit and comprises a regulating capacitor and a regulator connected in series. The regulator is controlled by the controller to perform one of the working modes including initial open circuit, power on conduction, short circuit normal operation and over-voltage open circuit protection. Therefore, the present invention overcomes the problem of inrush current upon powering on, and particularly, the controller performs digital operation with flexibility to meet actual requirements by updating appropriate firmware of software program.

Power supply and method of power supplying

A power converting apparatus with dynamical driving adjustment includes a rectifying unit, a power factor correction unit, a power conversion unit and a feedback unit. The rectifying unit rectifies an AC input power to generate and transfer a DC power to the power factor correction unit for performing power factor correction. A power factor correction power is generated and transferred to the power conversion unit. The feedback unit is electrically connected to the power conversion unit to form a closed control loop. A PWM driving controller of the power conversion unit performs an adjustment process to control a switching transistor based on a feedback signal from the feedback unit, and the power conversion unit converts the power factor correction power into an output power supplied to an external load. Thus, the margin for electromagnetic interference is increased, and both switching loss and conduction loss are considerably reduced.

Power converting apparatus with dynamic driving adjustment

A power control apparatus with dynamical adjustment of driving capability for converting an input power into an output power includes a transformer, a switch transistor connected to the transformer, a pulsed width modulation (PWM) driving controller generating a PWM signal and connected to the switch transistor, an isolation element, an output diode and an output capacitor. The first side coil of the transformer and the switch transistor are connected to the input power, the second side coil of the transformer is connected to the output diode and further connected to the output capacitor and an external load. The isolation element converts the output power into a feedback signal providing the PWM driving controller to dynamically control the PWM driving signal through adjustment so as to implement the optimal turn-on current for the switch transistor. Therefore, electrical performance and conversion efficiency are greatly improved by reducing the switching loss.

Growing community of inventors

Taipei, Taiwan

Shu-Chia Lin