Unlock instant, AI-driven research and patent intelligence for your innovation.

Bootstrap circuit for switching power supplies

A switching power supply, power supply voltage technology, applied in electrical components, regulating electrical variables, output power conversion devices, etc., can solve the problems of inability to guarantee breakdown voltage, increased cost, and complicated industrial processes.

Inactive Publication Date: 2005-07-13
STMICROELECTRONICS SRL
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The control of the charge present in the epitaxial layer required for the withstand voltage of the device does not guarantee a breakdown voltage higher than about 20V
[0007] Fabrication of thick epitaxial layers allows to increase the breakdown voltage, but it leads to complication and cost of the industrial process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bootstrap circuit for switching power supplies
  • Bootstrap circuit for switching power supplies
  • Bootstrap circuit for switching power supplies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Referring to Fig. 1, it represents the schematic diagram of the switching power supply comprising starting circuit 13 according to the first embodiment of known technology, wherein shows the rectification and filter circuit 10 of main power supply, self-power supply circuit 12 and rectification and filter circuit 10 The control circuit 11.

[0019] The circuit 10 for rectification and filtering of the mains receives at the input side the supply voltage Vac of the grid, rectifies it through the diode bridge 14 , filters it through the capacitor 15 , and supplies it to the warm terminal of the primary winding W1 of the transformer 16 . The secondary winding W2a of the transformer 16 supplies the rectifier diode 17 and the smoothing capacitor 18 with the voltage appearing at its terminals. Circuit 10 provides an output voltage Vout at its output.

[0020] The control circuit 11 of the circuit 10 for rectification and filtering of the main power supply receives at its inpu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention refers to a starting circuit for switching power supplies (SMPS), to a switching power supply comprising a starting circuit and an integrated circuit of a switching power supply. In an embodiment thereof the starting circuit for switching power supplies having a first supply voltage (Vin) coming from a first terminal and a second supply voltage (Vcc) coming from a second terminal and a third terminal; said starting circuit comprises: a first current path between said first terminal and said third terminal, a second current path between said first tenninal and said second terminal; a third current path between said second terminal and said third terminal, a two-way voltage regulator placed along said second current path.

Description

technical field [0001] The invention relates to a starting circuit for a switching power supply (SMPS), a switching power supply including a starting circuit, and a switching power supply integrated circuit. Background technique [0002] Most control ICs used in switching power supplies require a current to charge the capacitors of the IC's self-powered circuit at start-up. This current comes from a start-up circuit, which in the simplest case consists of a resistor connected to the supply line. [0003] When the voltage on the capacitor reaches a preset voltage value called the startup voltage, the control circuit is powered by the self-powered circuit. Self-powered circuits generally consist of an additional winding wound on the main transformer of the switching power supply, to which a suitable rectification and filtering circuit is connected. [0004] Because of the increasing demands for reducing power consumption that have recently emerged, the simple resistors descr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M1/36H02M3/335
CPCH02M1/36H02M3/335H02M1/0006
Inventor 茂罗·法格纳尼奥比诺·皮杜蒂克劳迪奥·埃德瑞格纳
Owner STMICROELECTRONICS SRL