Use of state trajectory prediction in hysteresis control for achieving fast transient response of the buck converter

- A dynamic hysteresis control of the buck converter for achieving high slew-rate response to disturbances is proposed. The hysteresis band is derived from the output capacitor current that predicts the output voltage magnitude after a hypothesized switching action. Four switching criteria are formulated to dictate the state of the main switch. The output voltage can revert to the steady state in two switching actions after a large-signal disturbance. The technique is verified with the experimental results of a 50W buck converter.

• Type: Conference
• Year: 2003
• Where: ISCAS
• Authors: Kelvin Ka Sing Leung, Henry Shu-Hung Chung, Ron Shu-Yuen Hui
• Keywords: Buck Converter, ISCAS 2003, Output Voltage, Switching Actions