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· Driving a High-Side MOSFET Input Switch Using Active Low Output for System Power Cycling

Abstract Applications such as wireless transceivers where systems are placed in remote areas and usually powered with a battery require continuous operation since they are rarely visited and intervened. A system reset is required after persistent inactivity or a system hang-up to restore operation. This can be achieved by cutting off the supply voltage, disconnecting it from the system, and connecting it again to initiate a restart. This article discusses methods and techniques for using the active low output of a supervisory circuit to drive a high-side input switch to execute a system power cycle. Introduction One way to improve the reliability and robustness of electronic systems is to implement protection mechanisms that can detect faults and respond promptly. These mechanisms function as safeguards, mitigating potential damage and ensuring the proper function of a system. Power cycling is a method to ensure proper operation and protect systems and is generally conducted on un...
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01-10
2024
· How Gallium Nitride (GaN) Enables More Efficient Power Supplies？

Power transistors are one of the primary contributors to power loss in a switching power supply. Losses in the transistors are generally separated into two categories; conduction and switching. Conduction losses are those caused by current flow when the transistor is on and switching losses occur in the transition between on and off states.When on, GaN transistors (like those made of silicon) resemble a resistance between drain and source, often referred to as Ron, and the conduction losses are proportional to this resistance. A key benefit of GaN and other WBG materials is their relationship between breakdown voltage and Ron. Figure 1 shows the theoretical limits of this relationship for silicon, GaN, and silicon carbide (SiC), another WBG material. It can be seen that for a given breakdown voltage, the Ron of the WBG devices is much lower than that of silicon, with GaN being the lowest of the three. As silicon is nearing its theoretical limit, the use of GaN and other WBG materials...
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01-08
2020

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· Driving a High-Side MOSFET Input Switch Using Active Low Output for System Power Cycling

· How Gallium Nitride (GaN) Enables More Efficient Power Supplies？