Anpec Electronics Corporation

Chin-Hong Chen

Chieh-Wen Cheng

Chia-Chieh Weng

A current mode DC-DC conversion device with fast transient response is provided. The device includes a DC-DC converter, a pulse width control unit, a current feedback circuit, a fast transient feedback circuit, a first error amplifier, an adder, and a comparator. The current feedback circuit generates a current feedback signal according to the current passing through an inductor in the DC-DC converter. The fast transient feedback circuit generates a transient feedback signal according to a first voltage feedback signal. The first error amplifier amplifies the difference value between a second voltage feedback signal and a reference signal to generate an error amplification signal. The comparator compares the error amplification signal and the summation of current feedback signal and transient feedback signal to generate a comparison signal. The comparison signal is provided to the pulse width control unit for controlling the duty cycle of the power switch.

Current mode DC-DC conversion device with fast transient response

A power-on reset circuit is disclosed. The power-on reset circuit includes a first resistor; a first transistor, including a first terminal coupled to a second terminal of the first resistor, and a control terminal for receiving a reference voltage; a second resistor, including a first terminal coupled to a second terminal of the first transistor; a second transistor, including a first terminal coupled to a second terminal of the first resistor, and a control terminal coupled to a second terminal of the second transistor and utilized for receiving an input voltage; and a comparator, including a first input terminal for receiving a comparison voltage, and a second input terminal for receiving the reference voltage, for generating a power-on reset signal according to the comparison voltage and the reference voltage.

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Taichung, Taiwan

Chin-Hong Chen