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參數資料
| 型號： | LM494CN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Pulse Width Modulated Control Circuit |
| 中文描述： | 0.25 A SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 159K |
| 代理商： | LM494CN |
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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) |
| LM4950TS | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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