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

Power supply circuit for power supply control chip

A technology of power control chip and voltage control circuit, which is applied in the direction of circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, data processing power supply, etc., and can solve the problem of not having overvoltage protection and burning out of power control chips And other issues

Inactive Publication Date: 2015-01-21
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional power control chip power supply circuit does not have overvoltage protection function, and it is easy to burn out the power control chip when the input voltage is unstable

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
  • Power supply circuit for power supply control chip
  • Power supply circuit for power supply control chip
  • Power supply circuit for power supply control chip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] see figure 1 , in a preferred embodiment of the present invention, a power control chip power supply circuit includes a voltage control circuit 10 , a voltage output circuit 20 and a feedback protection circuit 30 .

[0012] see figure 2 , the voltage control circuit 10 includes a power control chip U1 , a first resistor R1 , a second resistor R2 and a capacitor C. The power control chip U1 includes a power terminal VDD, a driving voltage output terminal OUT, a reference terminal REF and a feedback terminal FB. The power terminal VDD receives a first DC voltage through the first resistor R1 and the second resistor R2 in sequence, and the power terminal VDD is grounded through the capacitor C.

[0013] The voltage output circuit 20 includes a field effect transistor Q1 and a transformer T. The field effect transistor Q1 includes a gate, a source and a drain. The transformer T includes a driving terminal, a first voltage input terminal, a second voltage input termina...

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

A power supply circuit for power control chips includes a voltage control circuit, a voltage output circuit and a feedback protect circuit. The voltage control circuit receives a first DC voltage, and outputs a voltage driving signal according to the first DC voltage. The voltage output circuit receives the voltage driving signal, and outputs a second DC voltage to a load according to the voltage driving signal. The feedback protect circuit receives the second DC voltage. The feedback protect circuit is turned on and connects the voltage control circuit to ground when the second DC voltage is over voltage. The voltage control circuit discharges to ground via the feedback protect circuit.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a power supply control chip power supply circuit. Background technique [0002] Existing notebook computers usually use a power control chip to receive an input voltage, and drive a transformer to output an output voltage of 48V to supply power to the load. The traditional power control chip power supply circuit does not have overvoltage protection function, and it is easy to burn out the power control chip when the input voltage is unstable. Contents of the invention [0003] In view of the above, it is necessary to provide a power control chip power supply circuit with an overvoltage protection function. [0004] A power supply control chip power supply circuit, including a voltage control circuit, a voltage output circuit and a feedback protection circuit, the voltage control circuit receives a first DC voltage, and outputs a voltage drive signal according to the received first DC ...

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): G06F1/26H02H9/04
CPCH02H9/041G06F1/26G06F1/30
Inventor 胡可友
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD