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Fix circuit power problem

I have designed a circuit to keep the heating element at a constant temperature. The digital part of the circuit is being feed from a 5V LDO which is powered by two 18650 batteries in series and the heating element is directly connected to the output batteries. Also heating element wire(approximately 2ohm) is controlled with an N channel low side mosfet by the microcontroller.

When controller toggles the mosfet because of the voltage drop on the supply.

The highest supply voltage for the system is between 6V-8.4V and load uses 2A. The problem is becomes more significant when the supply voltage gets lower. I don't think that any inrush current situation occurs because voltage continues to stay below 5V at the output of LDO as long as the load is active. Also i tried with both batteries(which can supply 20A) and a lab bench power supply but same problem occurs.

Compétences : Design de circuits, Génie Électrique, Electronique, Microcontrôleur, Mise en Page PCB

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Concernant l'employeur :
( 0 commentaires ) Istanbul, Turkey

Nº du projet : #21798014

16 freelance font une offre moyenne de $191 pour ce travail

xiaoguang2018

Hello. you should not use LDO. what is the voltage of VCC when driving mosfet? you need to separate the digital circuit from the mosfet drive , change ADC reference of ATtiny88. more.. Regards.

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(36 Commentaires)
5.5
sky19130

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6.3
du00000002

Hello, as your problem description seems to be missing, I have to wager an educated guess: - your microcontroller is sometimes resetting - more often at lower battery voltages. Provided you do not intend to send me y Plus

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(8 Commentaires)
4.9
Mestek

hello i am a computer engineer,i have masters in computer engineering,i have experience for more than 8 years in arduino and electronics,i have checked the schematic and have known the problem that causes that pwoer Plus

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(21 Commentaires)
4.7
jitendrabaraiya

I have more than 7 years experience in circuit design . so I can do your job within a time limit with your satisfaction.

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(6 Commentaires)
4.6
intellisenseIN

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4.4
abubakarayyub01

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2.8
avigupta0061

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1.7
Albertbestcoder

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0.0
xanup07

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0.0
Devendhiran17

Hello, I am working as a Hardware Design and Development Engineer for the past 8 years. I have debugged and resolved lot of issues which I have experienced during the circuit validation. I have worked in the design whi Plus

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0.0
softBruteForce

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0.0
waswasayari1956

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serdarzbk

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0.0
Vuphuong908

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