Abstract: A metal heat dissipating plate is provided. The metal heat dissipating plate includes a metal substrate, metal cladding layers, and graphite layers. The metal cladding layers are disposed on two surfaces of the metal substrate, and the graphite layers are intercalated into the metal cladding layers. Thus, the graphite layers can firmly bond to the metal substrate by the surface structure of the metal substrate and the metal cladding layer.

Abstract: This invention is related to a carbon-coated copper foil for heat dissipation, which comprising a copper foil, a metal-dielectric layer, and a carbon film. The copper foil is formed with a first rough surface, and the metal-dielectric layer is coated on the first rough surface of the copper foil. The metal-dielectric layer is formed with a second rough surface along with the first rough surface, and the carbon film is embedded and coated on the second rough surface. Accordingly, the rough surfaces of the copper foil and the metal-dielectric layer make the carbon atoms attach firmly on the copper foil. Furthermore, the carbon film formed by bonded carbon atoms has high thermal conductivity, so it can dramatically improve the effect of the heat dissipation of the electronics and extend the use life of the electronics.

Abstract: A control circuit of a switching regulator includes a control pin for coupling with an external resistor; a resistor detecting circuit for detecting a resistance of the external resistor; a current generating module for generating a corresponding control current according to a detection result of the resistor detecting circuit; an oscillating circuit for generating a clock signal; and a mode-switching circuit. When the mode-switching circuit configures the oscillating circuit to operate in a resistor-controlled mode, the oscillating circuit generates the clock signal according to the control current so that the clock signal has a frequency corresponding to the resistance of the external resistor. When the mode-switching circuit configures the oscillating circuit to operate in a signal-controlled mode, the oscillating circuit generates the clock signal according to an external synchronous signal coupled with the control pin so that the clock signal is synchronized with the external synchronous signal.

Abstract: A control circuit of a switching regulator includes a control pin for coupling with an external resistor; a resistor detecting circuit for detecting a resistance of the external resistor; a current generating module for generating a corresponding control current according to a detection result of the resistor detecting circuit; an oscillating circuit for generating a clock signal; and a mode-switching circuit. When the mode-switching circuit configures the oscillating circuit to operate in a resistor-controlled mode, the oscillating circuit generates the clock signal according to the control current so that the clock signal has a frequency corresponding to the resistance of the external resistor. When the mode-switching circuit configures the oscillating circuit to operate in a signal-controlled mode, the oscillating circuit generates the clock signal according to an external synchronous signal coupled with the control pin so that the clock signal is synchronized with the external synchronous signal.

Abstract: A DC-DC converter includes a switch circuit, a feedback circuit, an error amplifier, a soft-start circuit, and a signal modulation circuit. The switch circuit receives an input voltage and charges/discharges an inductor based on a switch control signal, thereby providing an output voltage. The feedback circuit provides a corresponding feedback voltage based on the output voltage. The error amplifier generates a comparing voltage based on the feedback voltage and a reference voltage. The soft-start circuit provides a ramp clamping voltage, which is outputted as the comparing voltage when the comparing voltage is larger than the ramp clamping voltage. The signal modulation circuit generates the switch control signal based on the comparing signal and a periodic signal.

Abstract: A DC-DC switched mode converter includes a voltage conversion circuit, a switch control circuit, a duty cycle detector, a control signal generator, and a control signal selector. The switch control circuit generates a first control signal. The duty cycle detector detects a duty cycle of the first control signal so as to generate a detection signal. The control signal generator generates a second control signal. The control signal selector outputs the first control signal or the second control signal for controlling the voltage conversion circuit according to the detection signal.

Abstract: A charging device for mobile phone includes a main body; a rotatable pin-rotating member having two pins connected thereto for leading in alternating current; a contact conduction mechanism located between the pin-rotating member and a circuit board in the main body to conduct alternating current from the pins to the circuit board; a mobile phone rest base for a mobile phone to engage therewith and be charged; and battery contacts for a 9V battery to connect thereto. The contact conduction mechanism includes an annular seat having multiple contacts provided thereon, a pair of conducting strips, a turnable disc, and a pair of pin contactors sequentially fixed to a front side of the circuit board to align and associate with the pin-rotating member, so that AC power is led in via the pins to the circuit board even when the pin-rotating member is turned.