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PDF LM494CN Data sheet ( Hoja de datos )
| Número de pieza | LM494CN | |
| Descripción | Pulse Width Modulated Control Circuit | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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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 b40 C to a85 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
Connection Diagram
16-Lead DIP
Ordering Information
Device
Code
LM494IN
LM494CJ
LM494CN
Package
Code
N16A
J16A
N16A
TL H 10056 – 2
Package
Description
Molded DIP
Ceramic DIP
Molded DIP
Top View
C1995 National Semiconductor Corporation TL H 10056
TL H 10056 – 1
RRD-B30M115 Printed in U S A
1 page  
Typical Applications
TL H 10056 – 10
FIGURE 6 Output Connections for Single Ended
and Push-Pull Configurations
TL H 10056 – 11
TL H 10056 – 12
FIGURE 7 Error Amplifier Sensing Techniques
TL H 10056 – 13
TL H 10056 – 14
FIGURE 8 Slaving Two or More Control Circuits
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LM494CN.PDF ] | |
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