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UC3842A 参数 Datasheet PDF下载

UC3842A图片预览
型号: UC3842A
PDF下载: 下载PDF文件 查看货源
内容描述: 高性能电流模式PWM控制器 [HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER]
分类和应用: 控制器
文件页数/大小: 15 页 / 131 K
品牌: STMICROELECTRONICS [ STMICROELECTRONICS ]
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UC2842A/3A/4A/5A - UC3842A/3A/4A/5A
THERMAL DATA
Symbo l
R
th j-amb
Description
Thermal Resistance Junction-ambient.
max.
Minid ip
100
SO 8
150
Unit
°
C/W
ELECTRICAL CHARACTERISTICS
( [note 1] Unless otherwise stated, these specifications apply for
-25 < T
amb
< 85°C for UC284XA; 0 < T
amb
< 70°C for UC384XA; V
i
= 15V (note 5); R
T
= 10K; C
T
= 3.3nF)
Symbo l
Parameter
T est Cond it ion s
UC284XA
UC384XA
Min. T yp. Max. Min. Typ . Max.
4.95 5.00 5.05 4.90 5.00 5.10
2
3
0.2
4.9
50
5
-30
T
j
= 25
°
C
T
A
= T
low
to T
high
(peak to peak)
47
7.8
25
-30
47
7.8
5.1
4.82
50
5
25
20
25
2
3
0.2
5.18
20
25
Uni t
REFERENCE SECTION
V
REF
∆V
REF
∆V
REF
Output Voltage
Line Regulation
Load Regulation
T
j
= 25°C I
o
= 1mA
12V
V
i
25V
1
I
o
20mA
(Note 2)
Line, Load, Temperature
10Hz
f
10KHz T
j
= 25
°
C
(note 2)
T
amb
=
(note 2)
125
°
C,
1000Hrs
V
mV
mV
mV/
°
C
V
µ
V
mV
mA
KHz
%
%
V
mA
V
µA
dB
MHz
dB
mA
mA
V
1.1
V
V
REF
/
T Temperature Stability
Total Output Variation
e
N
Output Noise Voltage
Long Term Stability
I
SC
Output Short Circuit
-100 -180
52
0.2
5
1.6
8.3
57
1
8.8
-100 -180
52
0.2
5
1.6
8.3
57
1
8.8
OSCILLATOR SECTION
f
OSC
Frequency
f
OSC
/
V
f
OSC
/
T
V
OSC
I
dischg
V
2
I
b
BW
PSRR
I
o
I
o
Frequency Change with Temp.
Oscillator Voltage Swing
Frequency Change with Volt. V
CC
= 12V to 25V
Discharge Current (V
OSC
=2V) T
J
= 25°C
Input Voltage
Input Bias Current
A
VOL
Unity Gain Bandwidth
Power Supply Rejec. Ratio
Output Sink Current
Output Source Current
V
OUT
High
V
OUT
Low
V
PIN1
= 2.5V
V
FB
= 5V
2V
V
o
4V
T
J
= 25°C
12V
V
i
25V
V
PIN2
= 2.7V V
PIN1
= 1.1V
V
PIN2
= 2.3V V
PIN1
= 5V
V
PIN2
= 2.3V;
R
L
= 15K
to Ground
V
PIN2
= 2.7V;
R
L
= 15K
to Pin 8
(note 3 & 4)
V
PIN1
= 5V (note 3)
12
V
i
25V (note 3)
ERROR AMP SECTION
2.45 2.50 2.55 2.42 2.50 2.58
-0.1
65
0.7
60
2
-0.5
5
90
1
70
12
-1
6.2
0.8
1.1
-1
65
0.7
60
2
-0.5
5
-0.1
90
1
70
12
-1
6.2
0.8
-2
CURRENT SENSE SECTION
G
V
Gain
V
3
SVR
I
b
Maximum Input Signal
Supply Voltage Rejection
Input Bias Current
Delay to Output
2.85
0.9
3
1
70
-2
150
3.15 2.85
1.1
-10
300
0.9
3
1
70
-2
150
3.15
1.1
-10
300
V/V
V
dB
µ
A
ns
3/15