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參數資料
| 型號： | LM494 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Pulse Width Modulated Control Circuit |
| 中文描述： | 脈寬調制控制電路 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 159K |
| 代理商： | LM494 |
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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| 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 |
| LM4940TS/NOPB | 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 |
| LM4940TSBD | 功能描述:音頻 IC 開發工具 LM4940TS EVAL BOARD RoHS:否 制造商:Texas Instruments 產品: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 開發工具 LM4940TS EVAL BRD RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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