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Questions tagged [power-dissipation]

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Anything related to power dissipation in electrical and electronic circuits and components, i.e. the process in which electrical energy is converted to heat when current flows through them.

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I’m designing a Class AB amplifier that needs to deliver up to 10 A RMS at frequencies as high as 100 kHz. The output stage uses Darlington transistors (TIP142 for NPN and TIP147 for PNP), powered ...
Sebastian Garcia's user avatar
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I would like to measure losses of the Infineon 1ED3124MC12H gate driver. To test this component, I created the following circuit, in which the 2.2nF capacitor corresponds to the gate-source capacitor ...
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I have a 30V DC power supply, and I want to power an LED strip consisting of 10 RGB LED modules (part number L1MC-RGB0028000MP0) in series. I am using three BCR420 LED drivers to set the current of ...
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When I Alt-click on the mosfet U1, the green graph is shown. Ctrl-click on the green formula shows an average dissipation of 279.46mW The formula in red is changed, I wanted absolute values for the ...
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I am aiming to design a UPS, however I will design the control board and get an external 2500 VA inverter and switch ON and OFF both of them using Triacs depends on the state of power if it was coming ...
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I am working on adjustable VCCS targeting 2 to 3A to my 0.5 ohm load. According to my schematic: I am controlling the current size through my load (H1, 0.5 ohm) by using DAC function of my MCU. ...
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When comparing "ultrafast" silicon diodes (those with usual recovery times given as either 50 or 75 ns) to silicon Schottky diodes at the same blocking voltage and average current rating, ...
tobalt's user avatar
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I am working on adjustable voltage controlled current source (2 to 3 A) for my project. I tried different NMOS for the projects, but they all burned. In my application, the resistance of my load is ...
djdlgl's user avatar
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I'm trying to calculate junction to ambient thermal resistance of a D2PAK soldered to a PCB with no aluminium heatsink, no thermal vias (PCB is 4-layer 1 Oz/layer). At 10A power dissipation of the ...
marcosbc's user avatar
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I am using a ZVS induction heater like this: Image Source The schematic looks akin to this (schematic has not been tested) Schematic Source I modified it with IRF3205 N-Channel MOSFETs for better ...
15 Volts's user avatar
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In a circuit, when two ideal components are used in parallel instead of using just one (same component in both cases), does it have any effect on any of the temperature values? junction / case / ...
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Thanks to the help of electronics.SE, I've designed my first power amplifier, intended for transmitting CW on 7 MHz. Before I order parts and build it, I'd request a design review. One important note:...
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I would like to use an LT1210 op-amp with a +/-12 VDC supply. The input is from a signal generator (10 Vpp, 400 Hz sine wave). The required circuit output is 5 Vrms (14.01 Vpp), 400 Hz and drives a ...
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I am learning about electrical engineering and have a question about this circuit. I don't have a very niche question, I'm just wondering how the circuit is affected by the addition of the LED. You ...
Sqidy P's user avatar
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Simple Question: What are the advantages and disadvantages of TO-220 package vs TO-3 package in different applications/power requirements? Is there a best route?
Klumpy7's user avatar
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I have a functional circuit designed for return line reverse protection, and a relevant portion of the circuit is shown below: simulate this circuit – Schematic created using CircuitLab In this ...
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Is there any rule of the thumb at which power dissipated in an IC one should be able to feel that it is hotter than the other components? More specifically, I have a "signal" that should ...
Sandro's user avatar
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I'm trying to calculate how much power dissipated as heat in an amplifier like LNA. Let's say a HBT device operates at 4.8 V with 80 mA operating current. Gain of the amplifier is 25 dB, OP1dB = 16 ...
Aparna B's user avatar
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How can I calculate the energy required to switch a Mosfet knowing the peak power, and the drain to source capacitance?
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I am planning a battery maintenance system that discharges a battery to a storage-compatible state of charge if the battery is not used for some time. I would ideally like to dissipate 4kWh over 15 ...
ARF's user avatar
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I'm working on a project that uses four L293D motor drivers to control three stepper motors and one DC motor. Separately, there is also a small servo motor. The L293Ds receive a 6V motor supply ...
E.HP.S's user avatar
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I am doing research on carbon conversion using the high voltage plasma method. In my research there is one problem, namely calculating the dissipation power where one of the parameters is determining ...
Cristian Agung P 1907156221's user avatar
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Does a Darlington configuration using two BJTs, say a BC548, override the total power they could dissipate?
imran muhd's user avatar
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How to I calculate the width of a PCB trace to survive use as a current limiting sense resistor? I'm looking at a low-side current limiting application like that shown in the schematic. The value of <...
learnvst's user avatar
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Can someone tell me how to calculate the power dissipation of digital ICs like NAND Flash, QSPI NOR Flash and microcontrollers?
sushmi Ram's user avatar
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I'm working on a special type of lamp that uses 10 high-power SMD LEDs and 10 low-power TH LEDs. The heat dissipation will be an issue, so almost the entirety of the PCB is copper pours for the SMD ...
anrieff's user avatar
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I want to make a thermal analysis of QFP and BGA packages for a microcontroller. I know that in terms of thermal dissipation BGA is a worse election, but I want to know how much worse it is. I don't ...
Developing Electronics's user avatar
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If I have a circuit with a computing chip drawing 1W, how much of that gets turned into heat? EDIT: I mean turned into heat 1. straight away (not in 1000 years) and 2. within the vicinity of the ...
asac's user avatar
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I am looking for some help in sizing a heat sink for an LED horticulture light I am building. I will be attaching two Bridgelux BXEB-L1190U-30G3000-C-C3 LED strips side by side, link below to specs, ...
Chuck's user avatar
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I am designing a heating circuit composed of ceramic heating resistors. I have a 24 V supply and I am limited to 3 A, which allows me to disipate total of 70W, which is my target. I have a limited ...
Lukáš Řádek's user avatar
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I've been struggling with this question for a while for some reason, even though it seems much easier that it should be. The question asks for the power dissipated in resistor R (the one in the middle)...
Krys's user avatar
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We are looking to develop a circuit that will reduce 12 V to 5 V @ 5 A using a low drop out (LDO) linear regulator. The best device that I found is the MIC29751-5.0WWT. The heat parameters for this ...
Gal Magen's user avatar
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Can the heat be calculated in a DC voltage drop circuit? 24 V, 150 Ω, ~100 mA. The first resistor was 1/2 W, the new one is 5 W. We want to know the expected heat for the new resistor. Looking to ...
Austin Williams's user avatar
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I need some help designing proper thermal management for my board. It's a mixed analog-digital circuit, the analog part is noise sensitive. I have +/- analog supply, and a + digital supply. Several of ...
user2844665's user avatar
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The picture shows a AD22103 sensor on a prototype board for a room temperature control. The sensor is intended to measure air temperature, not the board temperature. There was originally a ADT7410 ...
REPuzzle's user avatar
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I connected a L7805 to a water fountain that I measured to be consuming 0.1 A at 5 V to regulate power coming in from three 5 W, 12 V solar panels connected in parallel. The regulator is not heating ...
Reuben Miro's user avatar
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I'm using the OPA551PA amplifier to charge a capacitor to various voltages. After thermal calculations, the worst case scenario is depicted here. TA = 40C, Vin = 36V, Vout = 18V, Iload = 50mA. Under ...
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Maybe my question will be a little funny. But it will be very helpful if you can give a little information about one thing. In electronics, we calculate power at various points/calculations to predict/...
khatus's user avatar
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I am driving a P-MOSFET (IRLML6402) with ATtiny24A microcontroller. This is a battery powered system; that's why ATtiny is always on sleep. I originally configured a BJT which is driven by the ...
CaveScientist's user avatar
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For a project that I'm working on, I would like to generate an oscillating magnetic field. In order to achieve this, I would like to create a series LC circuit with multiple film capacitors in series ...
Mantabit's user avatar
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In a hot-swap application the FET spends some time in the linear region/Saturation region before it moves into the ohmic region. Here is a snippet of the turn on waveform seen for a FET: Yellow is ...
Hasman404's user avatar
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5 answers
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I'm trying to figure out how On Semi's LM2575D2T-5G is only 77% efficient. It's the fixed 5 V output version of the component. The datasheet gives Vin = 12 V and Iload = 1 A. Based on this, power in = ...
Rick Bocola's user avatar
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Is there a general rule for calculating heat dissipation in electronic equipment if it's not listed in the specs? I have a couple of projects coming I'm working on that require this. For one situation ...
Frank's user avatar
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I'm using an MT3608L with an input voltage of 12 V to create a voltage of 18 V using the below schematic. As this is a cutout of a larger schematic, the input voltage is applied to the top left wire, ...
Hans Billiet's user avatar
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I build my own nixie clock with four digits (IN-14, 10k anode-resistor) with a seperate K155ID1-IC for each digit (so no multiplexing). Also, I am only using the 0-9 range, so every tube has one digit ...
verfelixt's user avatar
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I'm designing a system that is powered from a 10S2P LiPo battery pack and I was looking for an efficient way to monitor the battery level. My microcontroller is 5V logic level, and I understand I can ...
Barnabas Nomo's user avatar
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So, basically, I have this LED project which is going to dissipate lots of heat (I am assuming close to 50W) inside a case. The LEDs themselves are on a separate aluminum board which will be attached ...
alexoiunt1's user avatar
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I want to supply VOD3120AB with a voltage of 24v/2A from Power Supply. What is the value of the Resistor that I must add to the VCC of the VOD3120AB so that the VOD3120AB works properly? Information ...
Ihdina's user avatar
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I'm looking to power a 50W load approximately 140m away using 48V DC. At the far end I will use a DC-DC converter to convert this to 12VDC where it will power a small DC powered network switch I have. ...
Brandon Kellett's user avatar
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I want to calculate the total supply current and power dissipation of an op amp in a non-inverting voltage follower configuration with a split supply: simulate this circuit – Schematic created ...
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