摘要:
A DCR sense scheme is provided to sense the inductor current of a COT power converter. The DCR sense is implemented by using the direct current resistance of the output inductor of the COT power converter, and thus eliminates the ESR limitations on the type of output capacitors for stability concern. A quick response mechanism is further incorporated in the COT power converter to speed up the transient response of the COT power converter.
摘要:
A DCR sense scheme is provided to sense the inductor current of a COT power converter. The DCR sense is implemented by using the direct current resistance of the output inductor of the COT power converter, and thus eliminates the ESR limitations on the type of output capacitors for stability concern. A quick response mechanism is further incorporated in the COT power converter to speed up the transient response of the COT power converter.
摘要:
An electrical fuse and a process of programming the same are presented. An electrical fuse comprises a lower level silicide layer on a non-doped or lightly-doped polysilicon layer, an upper level conductive layer, and a tungsten contact coupled between the lower level silicide layer and the upper level conductive layer. The tungsten contact and a neck portion of the silicide layer are the programmable portion of the electrical fuse. High post-programming resistance is achieved by a first programming phase that depletes silicide in the silicide layer, followed by a second programming phase that depletes tungsten in the tungsten contact.
摘要:
A control circuit for a switching voltage regulator is disclosed, having a charging circuit, a discharging circuit, and a charging-discharging control circuit. The charging circuit generates a charging current according to the input voltage and the output voltage of the switching voltage regulator for charging a capacitor. The discharging circuit generates a discharging current according to the output voltage of the switching voltage regulator for discharging the capacitor. The charging-discharging control circuit configures the charging circuit, the discharging circuit, and the switching voltage regulator according to the voltage of the capacitor for providing a control signal to configure the switching voltage regulator.
摘要:
A multi-phase power converter with constant on-time control includes a plurality of channels to convert an input voltage into an output voltage, and each of the channels is driven by a control signal. When all channel currents of the channels are balanced, each of the control signals remains a constant on-time. When the channel currents are imbalanced, the on-times of the control signals are modulated according to the difference between each channel current and a target value for current balance between the channels.
摘要:
A multi-chip module (MCM) for power supply circuitry integrates a controller, a driver and two power MOSFETs in a single chip to shorten the signal path between the controller and the driver. When applied to a voltage regulator, the MCM shortens the feedback paths between the current sensors and the controller, so as to reduce the loss of and interference with the feedback signals, thereby improving the efficiency of the voltage regulator and simplifying the PCB traces routing.
摘要:
The present invention discloses a multi-phase switching regulator, a driver circuit of a multi-phase switching regulator, and a control method of a multi-phase switching regulator. The multi-phase switching regulator includes: at least two power stages, switching power transistors in the power stages to convert an input voltage to an output voltage according to pulse width modulation (PWM) signals generated by corresponding PWM controllers respectively; and a current balance circuit, generating a current balance signal according to the current of the corresponding power stage and a phase adjustment signal to averagely distribute current over the active power stages. In the present invention, the gain of the current balance circuit is adjustable, to avoid or reduce output voltage overshoot and undershoot when the phase number changes, while the current balance function is still achieved in normal operation.
摘要:
An image sensor module including a substrate, an image signal processor, a supporting board, an image sensor chip and a cover is provided. A concavity is located on a surface of the substrate. The image signal processor is disposed in the concavity e, and is electrically connected to the substrate. The supporting board is disposed on the surface of the substrate and covers the concavity. The image sensor chip is disposed on the supporting board and electrically connected to the substrate. The cover is disposed on the substrate, and covers the image sensor chip.
摘要:
An image sensor module including a substrate, an image signal processor, a supporting board, an image sensor chip and a cover is provided. A concave is located on a surface of the substrate. The image signal processor is disposed in the concave, and is electrically connected to the substrate. The supporting board is disposed on the surface of the substrate and covers the concave. The image sensor chip is disposed on the supporting board and electrically connected to the substrate. The cover is disposed on the substrate, and covers the image sensor chip.
摘要:
An image shooting system includes a plurality of image shooting modules, each of which has a lens device connected to a mobile device. The mobile device has an application unit, which interprets the location of the lens device connected thereto according to position data generated by the lens device. The application unit acquires position data of other image shooting modules via a communication platform, and includes other lens devices in the same area into a collaborative group to collaboratively shoot.