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參數資料
型號: LM494
廠商: National Semiconductor Corporation
英文描述: Pulse Width Modulated Control Circuit
中文描述: 脈寬調制控制電路
文件頁數: 1/8頁
文件大小: 159K
代理商: LM494
TL/H/10056
L
June 1989
LM494
Pulse Width Modulated Control Circuit
General Description
The LM494 is a monolithic integrated circuit which includes
all the necessary building blocks for the design of pulse
width modulated (PWM) switching power supplies, including
push-pull, bridge and series configurations. The device can
operate at switching frequencies between 1.0 kHz and
300 kHz and output voltages up to 40V. The operating tem-
perature range specified for the LM494C is 0
§
C to 70
§
C and
for the LM494V is
b
40
§
C to
a
85
§
C.
Features
Y
Uncommitted output transistors capable of 200 mA
source or sink
Y
On-chip error amplifiers
Y
On-chip 5.0V reference
Y
Internal protection from double pulsing of outputs with
narrow pulse widths or with supply voltages below
specified limits
Y
Dead time control comparator
Y
Output control selects single ended or push-pull opera-
tion
Y
Easily synchronized (slaved) to other circuits
Block Diagram
TL/H/10056–2
Connection Diagram
16-Lead DIP
TL/H/10056–1
Top View
Ordering Information
Device
Code
Package
Code
Package
Description
LM494IN
LM494CJ
LM494CN
N16A
J16A
N16A
Molded DIP
Ceramic DIP
Molded DIP
C
1995 National Semiconductor Corporation
RRD-B30M115/Printed in U. S. A.
相關PDF資料
PDF描述
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