參數(shù)資料
型號(hào)： NCV494
廠商： ON SEMICONDUCTOR
英文描述： SWITCHMODE Pulse Width Modulation Control Circuit(開(kāi)關(guān)模式PWM控制器)
中文描述： 開(kāi)關(guān)模式脈寬調(diào)制控制電路（開(kāi)關(guān)模式的PWM控制器）
文件頁(yè)數(shù)： 1/14頁(yè)
文件大?。?/td> 144K
代理商： NCV494
Semiconductor Components Industries, LLC, 2005
June, 2005 Rev. 6
1
Publication Order Number:
TL494/D
TL494, NCV494
SWITCHMODE
Pulse Width
Modulation Control Circuit
The TL494 is a fixed frequency, pulse width modulation control
circuit designed primarily for SWITCHMODE power supply control.
Features
Complete Pulse Width Modulation Control Circuitry
OnChip Oscillator with Master or Slave Operation
OnChip Error Amplifiers
OnChip 5.0 V Reference
Adjustable Deadtime Control
Uncommitted Output Transistors Rated to 500 mA Source or Sink
Output Control for PushPull or SingleEnded Operation
Undervoltage Lockout
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
PbFree Packages are Available*
MAXIMUM RATINGS
(Full operating ambient temperature range applies,
unless otherwise noted.)
Rating
Symbol
Value
Unit
Power Supply Voltage
V
CC
V
C1
,
V
C2
42
V
Collector Output Voltage
42
V
Collector Output Current
(Each transistor) (Note 1)
I
C1
, I
C2
500
mA
Amplifier Input Voltage Range
V
IR
P
D
R
JA
T
J
T
stg
T
A
0.3 to +42
V
Power Dissipation @ T
A
≤
45
°
C
Thermal Resistance, JunctiontoAmbient
1000
mW
80
°
C/W
°
C
°
C
°
C
Operating Junction Temperature
125
Storage Temperature Range
55 to +125
Operating Ambient Temperature Range
TL494B
TL494C
TL494I
NCV494B
40 to +125
0 to +70
40 to +85
40 to +125
Derating Ambient Temperature
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
1. Maximum thermal limits must be observed.
T
A
45
°
C
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
MARKING
DIAGRAMS
SOIC16
D SUFFIX
CASE 751B
See detailed ordering and shipping information in the package
dimensions section on page 4 of this data sheet.
ORDERING INFORMATION
TL494xDG
AWLYWW
x
A
WL
YY, Y
WW, W
G
= B, C or I
= Assembly Location
= Wafer Lot
= Year
= Work Week
= PbFree Package
1
16
PDIP16
N SUFFIX
CASE 648
*This marking diagram also applies to NCV494.
PIN CONNECTIONS
C
T
R
T
Ground
C1
1
Inv
Input
C2
Q2
E2
E1
1
≈
0.1 V
Oscillator
V
CC
5.0 V
REF
(Top View)
Noninv
Input
Inv
Input
V
ref
Output
Contro
l
V
CC
Noninv
Input
Compen/PWN
Comp Input
Deadtime
Control
Error
Amp
+
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
2Amp
+
Q1
TL494xN
AWLYYWWG
*
1
16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCV4949 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:AC-DC Offline Switching Controllers/Regulators
NCV4949A 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:100 mA, 5.0 V, Low Dropout Voltage Regulator with Reset and Sense
NCV4949ADR2G 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 100 MA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
NCV4949ADWR2G 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 100 MA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
NCV4949APDR2G 功能描述:低壓差穩(wěn)壓器 - LDO 5.0V 100 MA LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
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