I am trying to create a simple buck converter on a breadboard using this topology:
I am familiar with the theory of this circuit and believe I have connected everything correctly. The gate driver I am using is the L6385E.
Some of the parameters are:
Vcc = 16V
H.V. = 2-24V
L = 33uH
Cout = 3300uF
Cboot = 1uF
R = 10K
The FETS are IRF100B202. I will link the datasheet down below.
I apply a PWM of 62kHz to the Hin, and connect Lin to GND. With Vcc at 16V, Vboot becomes about 13V due to some internal losses. With H.V. around 2V this is fine and the high-side MOSFET is driven fine with a Vgs above 10V. Except, when I increase H.V., I would expect Vboot to rise the same amount, so the high-side FET can still be driven. But the problem is that Vboot does in fact not rise at all when I increase H.V.. This causes the high-side gate driver to stop working, because it can no longer supply Vgs = 10V to the FET.
I have tried a variety of different components and the problem still persists. Am I missing something crucial in the workings of this circuit, or am I maybe using some wrong components? I would appreciate some feedback!