There are little to none information about Peltier in the internet, especially in team of powering it, so here I try to ask few question about it.
Here is the particular one that I am referring to:
12706 Internal Resistance 2.1-2.4 ohm Imax 4-4.6 v 12v Vmax 15.2v QCmax 50-60W
Q1, Clearly, I should power it using 12v-15.2v power supply, but what about powering it with a higher voltage? Being dumb and all, I did powered it with a 19v DC and it works fine, so what is that Vmax all about?
Q2, What is the closest electronic component can a Peltier device model to? If I know that, then I know how to properly power it, but to me, it's like an unknown dark box.
Q3, PWM or NOT PWM? and why? Some people have claimed that it's not efficient to power it using PWM, but I think they are confused PWM with AC. Powering it using AC is like changing the Heat side to cold side many times in a second, which will only produce heat in the process.
Q4, A LED is a current device. what about this? Is it current driven or voltage driven? How to calculate the current? My test: powering it with 19v, got 5.1A and 12.8v got 3.5A;
Q5, It's not a resistor, nor a diode, maybe both? When measuring it with a meter, I got 12ohm with reverse; and 0 ohm with red to red and black to black.