LM5032EVAL/NOPB 产品设计参考手册 - TI（德州仪器）

User's Guide

SNVA395A–August 2009–Revised May 2013

AN-1962 LM5032 Interleaved Boost Evaluation Board

The LM5032 dual current mode PWM controller contains all the features needed to control an interleaved

boost converter. The two outputs operate 180 degrees out of phase and have separate current limit inputs

for each channel. In addition to a high input voltage range, the controller contains all the auxiliary features

Figure 1 shows the basic interleaved boost topology.

When Q1 turns on, current ramps up in L1 with a slope depending on the input voltage, storing energy in

L1. D1 is off during this time since the output voltage is greater than the input voltage. Once Q1 turns off,

D1 conducts delivering part of its stored energy to the load and the output capacitor. Current in L1 ramps

down with a slope dependent on the difference between the input and output voltage. One half of a

switching period later, Q2 also turns on completing the same cycle of events. Since both power channels

are combined at the output capacitor, the effective ripple frequency is twice that of a conventional single

channel boost regulator.