參數(shù)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(diào)制控制電路
文件頁數(shù)： 2/8頁
文件大小： 159K
代理商： LM494
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Storage Temperature Range
Ceramic DIP
Molded DIP
b
65
§
C to
a
175
§
C
b
65
§
C to
a
150
§
C
Operating Temperature Range
Industrial (LM494I)
Commercial (LM494C)
b
40
§
C to
a
85
§
C
0
§
C to
a
70
§
C
Lead Temperature
Ceramic DIP (Soldering, 60 sec.)
Molded DIP (Soldering, 10 sec.)
300
§
C
265
§
C
Internal Power Dissipation (Notes 1, 2)
16L-Ceramic DIP
16L-Molded DIP
1.50W
1.04W
Supply Voltage
42V
Voltage from Any Lead to Ground
(except Lead 8 and Lead 11)
V
CC
a
0.3V
Output Collector Voltage
42V
Peak Collector Current
(I
C1
and I
C2
)
ESD Susceptibility
250 mA
(to be determined)
Recommended Operating
Conditions
Power Supply Voltage (V
CC
)
Voltage on Any Lead
except Leads 8 and 11
(Referenced to Ground) (V
I
)
Output Voltage Collector (V
C1
, V
C2
)
Output Collector Current (I
C1
, I
C2
)
Timing Capacitor (C
T
)
Timing Resistor (R
T
)
Oscillator Frequency (f
OSC
)
7.0V to 40V
b
0.3V to V
CC
a
0.3V
b
0.3V to 40V
200 mA
470 pF to 10
m
F
1.8 k
X
to 500 k
X
1.0 kHz to 300 kHz
LM494
Electrical Characteristics
T
A
e
0
§
C to
a
70
§
C for the LM494C, T
A
e b
40
§
C to
a
85
§
C for the LM494I, V
CC
e
15V, f
OSC
e
10 kHz, unless otherwise specified
Symbol
Parameter
Conditions
Min
Typ
Max
Units
REFERENCE SECTION
V
REF
Reference Voltage (Note 3)
I
REF
e
1.0 mA
7.0V
s
V
CC
s
40V
4.75
5.0
5.25
V
Reg
LINE
Line Regulation of
Reference Voltage
2.0
25
mV
TCV
REF
Temperature Coefficient of
Reference Voltage
0
§
C
s
T
A
s
70
§
C
0.01
0.03
%/
§
C
Reg
LOAD
Load Regulation of
Reference Voltage
1.0 mA
s
I
REF
s
10 mA
1.0
15
mV
I
OS
Output Short Circuit Current
V
REF
e
0V
0
§
C
s
T
A
s
a
70
§
C
b
40
§
C
s
T
A
s
a
85
§
C
10
35
50
mA
35
OSCILLATOR SECTION
f
OSC
Oscillator Frequency
(Figure 10)
C
T
e
0.01
m
F,
R
T
e
12 k
X
C
T
e
0.01
m
F,
R
T
e
12 k
X
10
kHz
D
f
OSC
Oscillator Frequency Change
0
§
C
s
T
A
s
a
70
§
C
b
40
§
C
s
T
A
s
a
85
§
C
2.0
%
2.0
DEAD TIME CONTROL SECTION
I
IB (DT)
Input Bias Current
V
CC
e
15V, 0V
s
V
4
s
5.25V
V
CC
e
15V, Lead 4
e
0V,
Output Control
e
V
REF
b
2.0
b
10
m
A
DC
(Max)
Maximum Duty Cycle,
Each Output
45
%
V
TH(in)
Input Threshold Voltage
Zero Duty Cycle
3.0
3.3
V
Maximum Duty Cycle
0
ERROR AMPLIFIER SECTIONS
V
IO
Input Offset Voltage
V
3
e
2.5V
V
3
e
2.5V
V
3
e
2.5V
7.0V
s
V
CC
s
40V
2.0
10
mV
I
IO
Input Offset Current
25
250
nA
I
IB
Input Bias Current
0.2
1.0
m
A
V
ICR
Input Common Mode
Voltage Range
b
0.3
V
CC
V
A
VS
Large Signal Voltage Gain
0.5V
s
V
3
s
3.5V
60
74
dB
BW
Bandwidth
650
kHz
2
相關(guān)PDF資料
PDF描述
LM494CJ Pulse Width Modulated Control Circuit
LM494CN Pulse Width Modulated Control Circuit
LM5026 Active Clamp Current Mode PWM Controller
LM5026MT Active Clamp Current Mode PWM Controller
LM5026MTX Active Clamp Current Mode PWM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM4940 制造商:NSC 制造商全稱:National Semiconductor 功能描述:6W Streo Audio Power Amplifier
LM4940TS 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
LM4940TS/NOPB 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
LM4940TSBD 功能描述:音頻 IC 開發(fā)工具 LM4940TS EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
LM4940TSBD/NOPB 功能描述:音頻 IC 開發(fā)工具 LM4940TS EVAL BRD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*