DC/DC开关电源中的斜率补偿及其他问题

njuer

全英文的实用资料

tomandrosea

谢谢,是我需要的

tomandrosea

回复，以感谢楼主

tomandrosea

xiexie  ya  ,lao da

scochen

太好了,最近正在学习这方面的东西

katherinezhang

太好了,正需要,谢谢

robberxiong

浪费money啦，原来俺下过的!

maplefire

至少给各介绍吧

semico_ljj

Introduction
This detailed section contains an in-depth explanation of
the numerous PWM functions, and how to maximize their
usefulness. It covers a multitude of practical circuit design
considerations, such as slope compensation, gate drive
circuitry, external control functions, synchronization, and
paralleling current mode controlled modules. Circuit diagrams
and simplified equations for the above items of interest
are included. Familiarity with these topics will simplify
the design and debugging process, and will save a great
deal of time for the power supply design engineer.

semico_ljj

Current mode control regulates the PEAK inductor current
via the ‘inner’ or current control loop. In a continuous mode
(buck) converter, however, the output current is the AVERAGE
inductor current, composed of both an AC and DC
component.
While in regulation, the power supply output voltage and
inductance are constant. Therefore, VOUT / Ls~c and
dl/dT, the secondary ripple current, is also constant. In a
constant volt-second system, dT varies as a function of
VIN, the basis of pulse width modulation. The AC ripple
current component, dl, varies also as a function of dT in
accordance with the constant Vour Ls~c.