A current protection module, system and method
A technology of current protection and current sampling, applied in the field of electronics, can solve the problem of high product cost
Active Publication Date: 2021-07-30
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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Problems solved by technology
[0004] Due to the need to use multiple current protection modules, the product cost is high
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[0067] In order to make the objects, technical solutions, and advantages of the present invention more clearly, the technical solutions in the embodiments of the present invention will be described in contemplation in the embodiments of the present invention, and will be described, and the embodiments described in the embodiments of the present invention will be described. It is a part of the present invention, not all of the embodiments, based on the embodiments of the present invention, and those of ordinary skill in the art without all other embodiments obtained without making creative labor. scope.
[0068] like figure 1 As shown, one embodiment of the present invention provides a current protection module, which may include:
[0069] The main chip 101, the triode 102, the current protection threshold design unit 103 and the differential comparator chip 104 having the multi-set differential comparator 1041;
[0070] Wherein, the differential comparator 1041 includes a first in...
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The invention provides a current protection module, system and method. The current protection module includes: a main chip, a triode connected to the main chip, a current protection threshold design unit and a differential comparator chip; Each power switch circuit in the multi-channel PFC module corresponds to multiple sets of differential comparators; the first input terminal of the differential comparator is connected to the corresponding power switch circuit, the second input terminal is connected to the current protection threshold design unit, and the output terminal is connected to the current protection threshold design unit. The triodes are connected; the differential comparator chip samples the current sampling signals of each power switch circuit, and when any corresponding value exceeds the current protection threshold, the triode is controlled to be turned on; when the triode is turned on, the main chip determines that the current of the multi-channel PFC module is abnormal and executes Current protection treatment. Since the current conditions of multiple circuits can be monitored simultaneously through one current protection module without setting up multiple current protection modules, the product cost is low.
Description
Technical field [0001] The present invention relates to the field of electronic technology, and more particularly to a current protection module, system and method. Background technique [0002] As technology advances, multi-channel PFC (Power Factor Correction, Power Factor Correction) Module is slowly applied to high-power air conditioning inverter drives. Multi-PFC modules typically include at least two power switching circuits. For example, more common, including multiple interleaving active PFC modules including two or three-way power switching circuits, each circuit works in sequence according to 90 ° or 120 ° phase. [0003] At present, a current protection module connected to the single circuit PFC module, once the current is abnormal, the current protection module can perform the corresponding protection processing, thereby ensuring that the single circuit PFC module can stabilize and reliably. Based on similar implementation principles, a plurality of current protection...
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IPC IPC(8): H02H7/12H02H3/02H02M1/42
CPCH02H3/02H02H7/12H02M1/42Y02B70/10
Inventor 石明杰刘启武
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD