YANG Xiao, LOU Fu-jun, XU Jin-li, et al. Design of Error Amplifier with Multi-functions for Peak-Current Mode DC-DC Converters[J]. Acta Electronica Sinica, 2017, 45(2): 508-512.
A novel error amplifier with integration of multi-functions for peak-current mode DC-DC converters is presented.Soft-start is achieved by the error amplifier combined with a ramp voltage signal.A smooth transition from start-mode to the steady state is achieved without disturbance
and the inrush current and the overshoot of the output voltage during start-up are eliminated effectively.Moreover
this novel error amplifier has other two functions
which are the maximum current limit and working mode switching.The error amplifier is applied to a peak-current mode BOOST DC-DC converter that is implemented with CSMC 0.5 m BCD process.Simulation results show that the static current consumption of the error amplifier is 4.48 A with 3.5V supply voltage
and the soft-start
maximum current limit and working mode switching functions are achieved by the multi-functions error amplifier.The presented circuit is concise and simple to implement