Title :
High-performance error amplifier for fast transient DC-DC converters
Author_Institution :
Dept. of Electr. & Comput. Eng., Hanyang Univ., Ansan, South Korea
Abstract :
A new error amplifier is presented for fast transient response of dc-dc converters. The amplifier has low quiescent current to achieve high power conversion efficiency, but it can supply sufficient current during large-signal operation. Two comparators detect large-signal variations, and turn on extra current supplier if necessary. The amount of extra current is well controlled, so that the system stability can be guaranteed in various operating conditions. The simulation results show that the new error amplifier achieves significant improvement in transient response than the conventional one.
Keywords :
DC-DC power convertors; comparators (circuits); operational amplifiers; transient response; fast transient DC-DC converters; high power conversion efficiency; high-performance error amplifier; low quiescent current; transient response; Circuit stability; Latches; Operational amplifiers; Pulse amplifiers; Pulse width modulation; Pulse width modulation converters; Stability analysis; Switching converters; Transient response; Voltage; Boost converter; dc–dc converter; error amplifier; operational transconductance amplifier (OTA); pulsewidth modulation (PWM); transient response;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2005.850521
