Boost Converter Chip for Adaptive Ramp Voltage Mode Control with Feedforward
This study proposes an adaptive ramp voltage mode boost converter chip with feedforward.Compared with the traditional voltage mode control DC-DC converter chip,the ramp voltage amplitude and slope DC value of the proposed control loop were determined by the input and output voltages,which have adaptive ramp characteristics and reduce the linearity and load adjustment rate of the converter.At the same time,the linear and load transient response speed was improved by adding the input voltage feedforward path and the fast feedback path.The Boost converter was designed using a 0.18-μm BCD process.The simulation results showed that the linearity of the output voltage and the load adjustment ratio were less than 0.5％.When the input voltage changed from 3.6 V to 4.2 V,the range of the output voltage overshoot/downshoot was less than 1％,and the recovery time was approximately 50 μs.Under the transient change in load current from 100 mA to 200 mA,the range of output voltage overshoot/downshoot was within 0.5％,and the recovery stability time was approximately 45 μs.
voltage modeadaptive slopefeedforward and fast feedbackDC-DC converter
万方数据
维普
