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Hello,
I posted some months ago a topic about my fried Z2GO but it was mostly because of bad wiring while charging my battery.
I bought another one and I'm happy with it, it does the job for a project I'm building... The thing is that when it's turned on (blinking red to bright green), this component on the attached picture becomes REALLY hot, like it's hurting if I let my finger on it (must be at 80°C something like that), I had to put a raspberry pi heat sink on this component to cool it down...
Is this normal ? What issue can cause this problem ? Thank you !
Regards,
Nicolas
Posted : 29/11/2024 9:53 pm
The control method of the MP4462 determines that the peak inductor current is related to the input voltage, output voltage, and switching frequency. When the input voltage is rather high (e.g. 18V), compared to lower input voltages, the current ripple increases, leading to a higher RMS current in the inductor and causing it to heat up.
That inductor has about 0.3 Ohms DC resistor, and the current through it will generate heat. Higher input voltage and higher output current will generate more heat.
Although ~80°C is rather high, it is still within this inductor's operating temperature range (-25 to +120 ℃).
Posted : 30/11/2024 10:41 am