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DC solid-state power controller

A solid-state power and controller technology, which is applied in the direction of electrical components, emergency protection circuit devices, etc., can solve the problems of turning off MOSFETs and cannot meet the needs of fast shutdown, so as to reduce system power consumption, improve environmental adaptability, The effect of low power consumption

Active Publication Date: 2012-07-11
CHINA AEROSPACE TIMES ELECTRONICS +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This 1.6mA current will discharge the gate-source charge of the power MOSFET, but if the abnormal turn-off link is handled in this way, it will not be able to turn off the MOSFET in a short period of time, such as 100us
Therefore, it cannot meet the needs of fast shutdown

Method used

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Embodiment Construction

[0037] The hardware programmable function of the solid-state power controller is introduced below in combination with specific examples.

[0038] Such as figure 1 As shown, the DC solid-state power controller of the present invention includes a control chip (SSPC ASIC), a power supply module, a switch state detection module, an optocoupler isolation module, a power MOSFET, and a current detection resistor based on a fully customized integrated circuit chip (ASIC) technology. R S , and other off-chip devices. The external power supply voltage is 28V DC voltage, which is isolated and processed by the power module into 12V and 5V power supplies for the control chip. As the core component of the solid-state power controller, the control chip is responsible for receiving the control signals of the upper system and feeding back the bus current status, load status and MOSFET switch status. When the voltage across the resistor Rs exceeds the threshold voltage (or the current multip...

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Abstract

The invention relates to a DC solid-state power controller, which is suitable for power distribution networks with different power levels. The DC solid-state power controller consists of a signal processing unit based on and taking a full-custom special integrated-circuit chip as the core, a power supply isolation unit, a signal isolation unit, a power MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) and a resistor connected in series with a bus. The DC solid-state power controller receives a driving switching signal to achieve on / off of the MOSFET connected in series to the bus, can serve the functions of bus load detection, current-limiting protection, overcurrent protection, short-circuit protection and self protection, and can achieve a plurality of protection parameters through change of a hardware circuit. All functions of the solid-state power controller are served by the internal hardware circuit, and the MOSFET driving signals and the protection signals are all generated by a full-custom integrated circuit. Therefore, the DC solid-state power controller has the characteristics of strong anti-interference performance, short reaction time, simple structural design, high reliability, low power consumption, compactness and the like.

Description

technical field [0001] The invention relates to a solid-state power controller, in particular to a DC solid-state power controller whose protection algorithm is realized by a hardware circuit and can be programmed externally. Background technique [0002] The solid-state power controller is a switch controller that uses a solid-state switch-MOSFET to realize the function of a relay and an overload protector in a traditional power distribution unit. The solid-state power controller detects the temperature of the bus cable based on the "thermal memory" theory of the bus cable. In the case of bus overcurrent, it realizes the bus trip within the specified time range for different bus currents. Compared with traditional relays and overload protectors, solid-state power controllers have the following advantages: [0003] 1. Flexible control of trip protection time for different bus currents [0004] 2. Feedback of abnormal bus current information and load status [0005] Curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22
Inventor 杨帆赵英凯唐侃朱灵允
Owner CHINA AEROSPACE TIMES ELECTRONICS
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