Tag: MOSFET
MOSFET Gate Driver Isolation: Why It’s Essential and How to Fix It
The Problem : When using a MOSFET to control high-power loads like motors or LEDs, the gate needs to be driven correctly to ensure fast switching and prevent damage. However, without gate driver isolation, voltage spikes or noise from the load can feed back into the control circuit, potentially damaging the microcontroller or Arduino. …
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SMPS Component Derating Guide for Indian Prototypers
The Problem : When designing a Switched Mode Power Supply (SMPS), component derating is essential to ensure reliability and longevity. Derating means using components below their maximum rated limits to avoid overheating and premature failure. For example, if a capacitor is rated for 50V, operating it at 40V or lower improves durability. The …
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Reverse Polarity Protection in 5G Modules: Safeguard Your Circuits
The Problem : Reverse polarity is a common issue when connecting power to 5G modules, especially during rapid prototyping or DIY projects. Accidentally swapping the positive and negative terminals can damage sensitive components, leading to costly repairs or replacements. Fortunately, adding a reverse polarity protection circuit is a simple and effective solution. The …
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Understanding MOSFET Thermal Impedance: A Beginner’s Guide
The Problem : When using MOSFETs in circuits that handle high power, heat dissipation becomes a critical concern. Thermal impedance determines how efficiently heat moves from the MOSFET’s junction (internal core) to the surrounding environment. If the thermal impedance is too high, the heat stays trapped, leading to overheating, reduced efficiency, and possible damage. …
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Reverse Protection for Automotive ECUs: A Simple Fix for Beginners
The Problem : Automotive Electronic Control Units (ECUs) manage essential vehicle functions. However, accidental reverse polarity during connection can damage these sensitive circuits. Reverse polarity occurs when the positive and negative terminals are swapped, leading to burnt components or permanent failure. The Solution : A simple and effective solution is using a …
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MOSFET High-Efficiency PWM Design for Beginners
The Problem : When designing a PWM (Pulse Width Modulation) circuit, choosing the right MOSFET ensures high efficiency and minimal heat loss. A common problem arises when using a MOSFET with a high gate threshold voltage. If the gate is not fully driven, it operates in the ohmic region, leading to heat buildup and …
MOSFET Current Mirror Circuits: A Simple Guide for Beginners
The Problem : A MOSFET current mirror is a circuit used to copy (mirror) a current from one branch to another, ensuring consistent current flow in different sections of a circuit. This is crucial in amplifiers and sensor circuits where stable current is essential. However, beginners often face issues with incorrect resistor values or …
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Reverse Polarity Protection for HVAC Controls
The Problem : Reverse polarity can damage HVAC control circuits if the positive and negative connections are swapped. This error can lead to burned-out components, system failure, or even safety hazards. Thankfully, preventing this is easy using diodes or MOSFETs to block reverse currents. The Solution : For basic protection, a Schottky …
SMPS Low-Power Mode Optimization: Boost Efficiency and Save Power
The Probelm : Switch Mode Power Supplies (SMPS) power many devices, but they often waste energy when running in low-power or standby mode. This happens because the control circuit keeps switching even when the load is minimal, leading to unnecessary power loss. The Solution : To fix this, you can optimize the …
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Optimizing Low-Power Mode in SMPS: A Simple Guide for Hobbyists
The Problem : Switch Mode Power Supplies (SMPS) are efficient when powering devices but often consume unnecessary power in standby or low-power mode. This is a common issue in battery-powered systems where even a small current drain can reduce battery life. High standby current can also heat up components and shorten the lifespan of …
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