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L298HN 产品描述及参数 - ST Microelectronics（意法半导体）
制造商:
ST Microelectronics（意法半导体）
分类:
电机驱动器
封装:
Multiwatt-15
描述:
STMICROELECTRONICS L298HN 芯片,双全桥驱动器, 低噪音, 15MWATT
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
典型应用电路图在P1P2
应用领域在P4
导航目录
L298HN数据手册
Page:
of 4 Go
若手册格式错乱，请下载阅览PDF原文件
April 2012
DT0003 Rev 1
1/4
www.st.com
DT0003
Design tip
Implementing fast decay mode chopping
using the L6506
By Thomas Hopkins
Main components
L6506 Current Controller For Stepping Motors
L6201, L6202, L6203 DMOS Full Bridge Driver
L298
Dual Full Bridge Driver
Purpose and benefits
The configuration using the L6506 with an H-Bridge driver IC implementing fast decay
mode or enable chopping is described. Typical applications for the L6506 implement slow
decay mode when used with H-Bridge drivers like the L6203 or the L298. In some
applications, however, having a fast decay of the motor current is needed to be able to
more quickly reduce the current in the motor.
Description
When implementing chopping on a full H-Bridge driver, two chopping modes are possible
as shown in Figure 1. The main difference between the two modes is the recirculation path
for the current and the slope of the current decay during recirculation. In slow decay, the
current ripple is lower, but the current decays slower. In fast decay, the ripple is
significantly higher, but the current can fall much faster.
Figure 1. Chopping Mode Operation
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