There is also a mistake in design according to datasheet, but i am not shure if it can cause this situation. The point is that the diming function is not used in this configuration, and according to datasheet in this case the PWM pin (11 pin) should be tied to INTVcc pin (pin 8) directly, instead it is tied to Vref pin (pin 12). The RP pin is tied to GND.
the input power is always bigger than the output powerstarts to heet up and the input power of circuit is biger than the output (guess there is a short somewhere).
Don´t know how you come to this conclusion...Please expalainBecause if you put another inductor in serial, with same characteristics you halve the current.
* "because of resistance": the resistance of an inductor has about no effect on current.About inductor on input. Well, as i understand the conception of a boost curcuit, it shorts the inductor, and with this move it can acquire huge current on it (because the resistence of inductor is small). If you put another inductor in series, you double the resistance and halves the current (if the second inductor is the same).
..still they no one said to connect them in series.About coil current. I guess the maximum current is still defined by resistence of the coil.
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