![]() The damping of L1 and C1 can easily be achieved by adding a damping R-C circuit across C1. The resonance of L1 and C1 leads to excessive voltages across the capacitor, which can damage the circuit. An output current controlled boost-buck converter tends to have an uncontrolled and undamped resonance due to an L-C pair (L1 and C1).This compensation also tends to slow down the response of the converter, which inhibits the PWM dimming capability of the converter (essential for LEDs). Complex compensation circuitry is often needed to make the converter operate properly. The converter is difficult to stabilize. ![]() ![]() In spite of the many advantages of the Cuk converter, a couple of significant disadvantages exist which prevent its widespread use. ![]()
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