Semiconductor Components Industries, LLC

System General Corporation

Jian-Ming Fu

Ju-Hyun Kim

Eui-Soo Kim

Ta-Yung Yang

Chou-Sheng Wang

Tse-Jen Tseng

Young-Bae Park

Wei-Hsuan Huang

Jung-Sheng Chen

Chien-Tsun Hsu

Yung-I Chang

Chi-Yin Lo

Shao-Chun Huang

David Jay Kunst

Jui-Chien Wang

Zhi-Bo Tao

A pollution detection circuit and a pollution detection method for data lines are provided. The pollution detection circuit and the method detect an impedance of at least one data terminal for detecting the pollution occurring at the data terminal or the data lines. The pollution occurring at the data terminal or the data lines is confirmed when the impedance is low.

Pollution detection circuit for data lines and method thereof

A protection circuit for a power converter is provided. The protection circuit includes a sensor circuit, a detection circuit and an initial protection circuit. The sensor circuit senses an output current of the power converter to generate a load signal. The detection circuit detects a voltage signal at a signal terminal of the connection port. The initial protection circuit compares the load signal with an initial-protection threshold. When the voltage signal at the signal terminal switches to a high level from a low level after the protection circuit is enabled, the power converter enters an initial protection mode and the initial protection circuit counts an initial period of a port-identification procedure. When the load signal is larger than the initial-protection threshold during the initial period of the port-identification procedure, the initial protection circuit generates a first protection signal to shut down the power converter.

Protection circuit and method for flyback power converter

A power converter and a control method therefor are provided. The power converter includes a transformer, a primary-side control circuit and a secondary-side control circuit. A primary side of the transformer receives an input voltage, and a secondary side of the transformer generates an output voltage. The primary-side control circuit controls a current switch of a primary winding and switching thereof. The secondary-side control circuit is disposed at the secondary side of the transformer. The secondary-side control circuit comprises a latch circuit. The latch circuit clamps a feedback signal and maintains a clamped status of the feedback signal when an fault event occurs. The primary-side control circuit stops switching the current switch of the primary winding when the feedback signal is clamped, and the latch releases the feedback signal when the output voltage is lower than a default latch voltage value.

Power converter and control method for fault event occurrence

A control circuit of a power supply is provided. The power supply includes a current-sense circuit, a voltage-sense circuit, an output voltage regulation circuit, and a current regulation circuit. The current-sense circuit generates a current-sense signal in response to an output current of the power supply. The voltage-sense circuit generates a voltage-sense signal in response to an output voltage of the power supply. The output voltage regulation circuit is coupled to regulate the output voltage of the power supply according to a voltage reference signal and the voltage-sense signal. The output current regulation circuit is coupled to regulate the output current of the power supply according to a current reference signal and the current-sense signal. The output voltage of said power supply is programmable.

Under-voltage protection circuit for programmable power supplies

A biased current-limit circuit for limiting a maximum output power of a power converter includes an oscillator for generating a pulse signal and an oscillation signal. A waveform generator generates a waveform signal in response to the oscillation signal. A sample-hold circuit is used to sample the waveform signal to generate a hold signal in response to a switching signal. The sample-hold circuit further samples the hold signal to generate a current-limit threshold in response to a second-sampling signal. A current comparator is utilized to compare a current-sensing signal with the current-limit threshold to limit a maximum on-time of the switching signal.

Method and apparatus of providing a biased current limit for limiting maximum output power of power converters

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Taichung, Taiwan

Jian-Ming Fu