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参数资料
| 型号： | L4981AD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A POWER FACTOR CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | SO-20 |
| 文件页数： | 11/16页 |
| 文件大小： | 2620K |
| 代理商： | L4981AD |
ELECTRICAL CHARACTERISTICS (Unless otherwise specified VCC = 18V, COSC = 1nF,
ROSC = 24K
, CSS = 1F, VCA-OUT = 3.5V, VISENSE = 0V, VLFF = VREF, IAC = 100A, VRMS = 1V,
VFEED = GND, VIPK = 1V, VOVP = 1V, TJ = 25
°C
Symbol
Prameter
Test Condition
Min.
Typ.
Max.
Unit
ERROR AMPLIFIER SECTION
VIO
Input Offset Voltage
–25
°C < TJ < 85°C
±8mV
IIB
Input Bias Current
VFEED = 0V
-500
-50
500
nA
Open Loop Gain
70
100
dB
V13H
Output High voltage
VFEED = 4.7V
IVA-OUT = -0.5mA
5.5
6.5
7.5
V
V13L
Output Low Voltage
VFEED = 5.5V
IVA-OUT = 0.5mA
0.4
1
V
-I13
Output Source Current
VFEED = 4.7V; VVA-OUT = 3.5V
2
10
mA
I13
Output Sink Current
VFEED = 5.5V; VVA-OUT = 3.5V
4
20
mA
REFERENCE SECTION
Vref
Reference Output Voltage
–25
°C < TJ < 85°C
4.97
5.1
5.23
V
Tj = 25
°C Iref = 0
5.01
5.1
5.19
V
Vref
Load Regulation
1mA
≤ Iref ≤ 10mA
–25
°C < TJ < 85°C
315
mV
Vref
Line Regulation
12V
≤ VCC ≤ 19V
–25
°C < TJ < 85°C
310
mV
Iref sc
Short Circuit Current
Vref = 0V
20
30
50
mA
OSCILLATOR SECTION
fosc
Initial Accuracy
Tj = 25
°C
85
100
115
KHz
Frequency Stability
12V
≤ VCC ≤ 19V
–25
°C < TJ < 85°C
80
100
120
KHz
Vsvp
Ramp Valley to Peak
4.7
5
5.3
V
I18C
Charge Current
VCOSC = 3.5V
0.45
0.55
0.65
mA
I18D
Discharge Current
VCOSC = 3.5V
11.5
mA
V18
Ramp Valley Voltage
0.9
1.15
1.4
V
SYNC SECTION (Only for L4981A)
tW
Output Pulse Width
50% Amplitude
0.3
0.8
s
I16
Sink Current with Low Output
Voltage
VSYNC = 0.4V
VCOSC = 0V
0.4
0.8
mA
-I16
Source Current with High Output
Voltage
VSYNC = 4.5V
VCOSC = 6.7V
16
mA
V16L
Low Input Voltage
0.9
V
V16H
High Input Voltage
3.5
V
td
Pulse for Synchronization
800
ns
FREQUENCY MODULATION FUNCTION (Only for L4981B)
f18max
Maximum Oscillation Frequency
VFREQ-MOD = 0V (Pin 16) Ifreq = 0
85
100
115
KHz
f18min
Minimum Oscillator Frequency
IFREQ-MOD = 360
A (Pin 16)
VVRMS = 4V (Pin 7)
74
KHz
IFREQ-MOD = 180
A (Pin 16)
VVRMS = 2V (Pin 7)
76
KHz
SOFT START SECTION
ISS
Soft Start Source Current
VSS = 3V
60
100
140
A
V12sat
Output Saturation Voltage
V3 = 6V, ISS = 2mA
0.1
0.25
V
L4981A - L4981B
4/16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L4981AD | 制造商:STMicroelectronics 功能描述:POWER SUPPLY IC |
| L4981AD013TR | 功能描述:功率因数校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L4981B | 功能描述:功率因数校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| L4981B | 制造商:STMicroelectronics 功能描述:POWER FACTOR CORRECTOR 4981 DIP20 |
| L4981BD | 功能描述:功率因数校正 IC Very High Power RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
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