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Power supply devices associated with DC voltage conversion and short-circuit protected

A power supply device and short-circuit protection technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as temperature rise of components, and achieve the effect of reducing current, reducing temperature and the risk of damage

Active Publication Date: 2017-04-12
SPI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the temperature of the DC-DC converter itself or the components inside the load may increase abnormally, thereby increasing the risk of damage to the DC-DC converter itself or the components inside the load

Method used

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  • Power supply devices associated with DC voltage conversion and short-circuit protected
  • Power supply devices associated with DC voltage conversion and short-circuit protected
  • Power supply devices associated with DC voltage conversion and short-circuit protected

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Embodiment Construction

[0055] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0056] figure 1 It is a schematic diagram of an embodiment of a power supply apparatus 10 of the present invention. see figure 1 The architecture of the power supply device 10 may be a DC voltage conversion configuration, and the power supply device 10 has a short protection function.

[0057]In this embodiment, the power supply device 10 includes: a power conversion circuit (power conversion circuit) 101, a control chip with soft-start function (control chip with soft-start function) 103, a short circuit protection circuit (short protection circuit) 105, a resistor Capacitor network (RC network) 107, output feedback circuit (output feedback circuit) 109, bypass capacitor (bypass capacitor) CBY, bootstrap capacitor (bootstrap capacitor) CBS, pull-up resistor (pull-up resistor) RPU, and set Fixed capacitance (settingcap...

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PUM

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Abstract

A power supply apparatus is provided, and which includes a power conversion circuit, a control chip with soft-start function and a short protection circuit. The power conversion circuit is configured to provide a DC output voltage to a load in response to an output pulse-width-modulation (PWM) signal. The control chip is operated under a DC input voltage, and configured to generate the output PWM signal to control the operation of the power conversion circuit. The short protection circuit is configured to pull-down the level of a soft-start pin of the control chip, so as to substantially / significantly reduce the frequency and duty cycle of the output PWM signal, and then substantially / significantly reduce the current flowing through the shorted load.

Description

technical field [0001] The present invention relates to a power conversion technology, more specifically to a power supply device associated with DC voltage conversion and having a short-circuit protection function. Background technique [0002] When the traditional DC-DC converter (DC-DC converter) using PWM-based control mechanism is short-circuited at the output terminal (load), if no additional short-circuit protection measures are taken, the DC-DC conversion The circuit breaker will continuously generate / output abnormally large current to flow through the short-circuited load. In this way, the temperature of the DC-DC converter itself or the components inside the load may increase abnormally, thereby increasing the risk of damage to the DC-DC converter itself or the components inside the load. Contents of the invention [0003] In view of this, in order to solve the problems mentioned in the background technology, the present invention provides a power supply device,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32
Inventor 魏隆吉朱庆佳
Owner SPI ELECTRONICS
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