Power supply unit with soft start and protection functions
A technology of protection function and power supply device, applied in the direction of output power conversion device, irreversible DC power input to AC power output, electrical components, etc., can solve problems such as large short-circuit current, safety problems, short-circuit protection, etc., to achieve The effect of increasing safety and avoiding damage to circuit functions
Active Publication Date: 2020-09-11
HAN WIN TECH CO LTD
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Problems solved by technology
[0005] In addition, the load device may have been damaged or failed due to internal short circuit problems, generally speaking, when a damaged or faulty load device is connected to the power supply unit, a real short circuit situation will occur to generate a huge short circuit current, resulting in short circuit protection
The user may re-attempt to reconnect a damaged or faulty load unit to the power unit, causing a true short circuit condition to occur again and again, causing safety concerns
Method used
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[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] In the various embodiments listed below, the same or similar components or components will be denoted by the same reference numerals.
[0019] figure 1 It is a schematic diagram of a power supply device with soft start and protection functions according to the first embodiment of the present invention. The power supply device 100 with soft start and protection functions of this embodiment is suitable for supplying power to the load 190 so that the load 190 can operate normally. In this embodiment, the load 190 includes a voltage stabilizing unit 191 and a load unit 192 coupled in parallel. Wherein, the voltage stabilizing unit 191 is, for example, a capacitor, and has a voltage stabilizing function, and the load unit 190 is, for ...
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The invention provides a power supply device with soft start and protection functions, which is suitable for loads with voltage stabilizing electric elements and load units coupled in parallel. The power supply device includes a power supply unit, a soft start adjustment unit, a current detection unit and a control unit. The power supply unit generates a supply voltage. The soft-start adjusting unit receives the power supply voltage, the first control signal and the second control signal, and converts the power supply voltage into a soft-start current to output the soft-start current to the voltage stabilizing unit or output the power supply voltage to the voltage stabilizing unit. The current detection unit measures the current of the loop formed between the power supply unit and the voltage stabilization unit to generate a current detection signal. The control unit receives the current detection signal and generates a first control signal and a second control signal. The invention effectively solves the problem of surge current generation.
Description
technical field [0001] The invention relates to the technical field of power supply, in particular to the invention of a power supply device with soft start and protection functions. Background technique [0002] Generally speaking, devices such as motors or servers (including their control and driving circuits) need to be connected to high-power power supply devices in order to obtain the power provided by the power supply devices for normal operation. However, the input terminals of devices such as motors or servers often have a voltage stabilizing circuit (usually composed of large capacitors), which is used to provide a stable voltage function when the load changes. When the main power switch of the high-power power supply device starts to operate instantaneously, the large capacitance of these voltage stabilizing lines will instantly generate a huge current, which is the so-called inrush current (Inrush Current). Due to the excessive surge current, if there is no surge...
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IPC IPC(8): G05F1/46G05F1/573G05F1/571
CPCG05F1/468G05F1/571G05F1/573Y02B70/10H02M1/32H02M1/36H02M7/44H02M1/0058
Inventor 高汉荣
Owner HAN WIN TECH CO LTD