參數(shù)資料
型號(hào)： LM494CJ
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： Pulse Width Modulated Control Circuit
中文描述： 0.25 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, CDIP16
封裝： CERAMIC, DIP-16
文件頁(yè)數(shù)： 2/8頁(yè)
文件大小： 159K
代理商： LM494CJ
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
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
LM5026SD Active Clamp Current Mode PWM Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM494CN 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Pulse Width Modulated Control Circuit
LM494IN 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Pulse Width Modulated Control Circuit
LM4950 制造商:NSC 制造商全稱:National Semiconductor 功能描述:7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier
LM4950TA 制造商:Texas Instruments 功能描述:AMP 3W STEREO/6W MONO 4950 TO-220
LM4950TA/NOPB 功能描述:IC AMP AUDIO PWR 7.5W AB TO220-9 RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機(jī)，2-通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點(diǎn):I²C，麥克風(fēng)，靜音，短路保護(hù)，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

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

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

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*