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LM494IN bảng dữ liệu(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
tên linh kiện LM494IN
Giải thích chi tiết về linh kiện  Pulse Width Modulated Control Circuit
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LM494IN bảng dữ liệu(HTML) 2 Page - National Semiconductor (TI)

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Absolute Maximum Ratings
If MilitaryAerospace specified devices are required
please contact the National Semiconductor Sales
OfficeDistributors for availability and specifications
Storage Temperature Range
Ceramic DIP
b
65 Cto a175 C
Molded DIP
b
65 Cto a150 C
Operating Temperature Range
Industrial (LM494I)
b
40 Cto a85 C
Commercial (LM494C)
0 Cto a70 C
Lead Temperature
Ceramic DIP (Soldering 60 sec)
300 C
Molded DIP (Soldering 10 sec)
265 C
Internal Power Dissipation (Notes 1 2)
16L-Ceramic DIP
150W
16L-Molded DIP
104W
Supply Voltage
42V
Voltage from Any Lead to Ground
(except Lead 8 and Lead 11)
VCC a 03V
Output Collector Voltage
42V
Peak Collector Current
(IC1 and IC2)
250 mA
ESD Susceptibility
(to be determined)
Recommended Operating
Conditions
Power Supply Voltage (VCC)
70V to 40V
Voltage on Any Lead
except Leads 8 and 11
(Referenced to Ground) (VI)
b
03V to VCC a 03V
Output Voltage Collector (VC1 VC2)
b
03V to 40V
Output Collector Current (IC1 IC2)
200 mA
Timing Capacitor (CT)
470 pF to 10 mF
Timing Resistor (RT)
18 kX to 500 kX
Oscillator Frequency (fOSC)
10 kHz to 300 kHz
LM494
Electrical Characteristics TA e 0 Cto a70 C for the LM494C TA eb40 Cto a85 C for the LM494I VCC e
15V fOSC e 10 kHz unless otherwise specified
Symbol
Parameter
Conditions
Min
Typ
Max
Units
REFERENCE SECTION
VREF
Reference Voltage (Note 3)
IREF e 10 mA
475
50
525
V
RegLINE
Line Regulation of
70V s VCC s 40V
20
25
mV
Reference Voltage
TCVREF
Temperature Coefficient of
0 C s TA s 70 C
001
003
% C
Reference Voltage
RegLOAD
Load Regulation of
10 mA s IREF s 10 mA
10
15
mV
Reference Voltage
IOS
Output Short Circuit Current
VREF e 0V
0 C s TA s a70 C10
35
50
mA
b
40 C s TA s a85 C35
OSCILLATOR SECTION
fOSC
Oscillator Frequency
CT e 001 mF
10
kHz
(Figure 10)
RT e 12 kX
D
fOSC
Oscillator Frequency Change
CT e 001 mF
0 C s TA s a70 C
20
%
RT e 12 kX
b
40 C s TA s a85 C
20
DEAD TIME CONTROL SECTION
IIB (DT)
Input Bias Current
VCC e 15V 0V s V4 s 525V
b
20
b
10
m
A
DC(Max)
Maximum Duty Cycle
VCC e 15V Lead 4 e 0V
45
%
Each Output
Output Control e VREF
VTH(in)
Input Threshold Voltage
Zero Duty Cycle
30
33
V
Maximum Duty Cycle
0
ERROR AMPLIFIER SECTIONS
VIO
Input Offset Voltage
V3 e 25V
V3 e 25V
20
10
mV
IIO
Input Offset Current
V3 e 25V
25
250
nA
IIB
Input Bias Current
V3 e 25V
02
10
m
A
VICR
Input Common Mode
70V s VCC s 40V
b
03
VCC
V
Voltage Range
AVS
Large Signal Voltage Gain
05V s V3 s 35V
60
74
dB
BW
Bandwidth
650
kHz
2


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