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參數(shù)資料
| 型號： | UC3843P |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Current Mode PWM Controller |
| 中文描述： | 電流模式PWM控制器 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大小： | 96K |
| 代理商： | UC3843P |
ELECTRICAL CHARACTERISTICS
(Unlessotherwise stated,these specifications apply for -25 < T
amb
<
85
°
C for UC2824X;0 < T
amb
< 70
°
C forUC384X;V
i
=15V (note5); R
T
= 10K;C
T
= 3.3nF)
Symbol
Parameter
Test Conditions
UC284X
Min. Typ. Max. Min. Typ. Max.
UC384X
Unit
REFERENCE SECTION
V
REF
Output Voltage
T
j
= 25
°
C I
o
= 1mA
12V
≤
V
i
≤
25V
1
≤
I
o
≤
20mA
(Note 2)
4.95
5.00
5.05
4.90
5.00
5.10
V
V
REF
V
REF
V
REF
/
T
Line Regulation
6
20
6
20
mV
Load Regulation
6
25
6
25
mV
Temperature Stability
0.2
0.4
0.2
0.4
mV/
°
C
V
Total Output Variant
Line, Load, Temperature (2)
4.9
5.1
4.82
5.18
e
N
Output Noise Voltage
10Hz
≤
f
≤
10KHz T
j
= 25
°
C
(2)
50
50
μ
V
Long Term Stability
T
amb
= 125
°
C, 1000Hrs (2)
5
25
5
25
mV
I
SC
Output Short Circuit
-30
-100 -180
-30
-100
-180
mA
OSCILLATOR SECTION
f
s
Initial Accuracy
T
j
= 25
°
C (6)
12
≤
V
i
≤
25V
T
MIN
≤
T
amb
≤
T
MAX
(2)
V
PIN4
Peak to Peak
ERROR AMP SECTION
V
PIN1
= 2.5V
47
52
57
47
52
57
KHz
Voltage Stability
0.2
1
0.2
1
%
Temperature Stability
5
5
%
V
4
Amplitude
1.7
1.7
V
V
2
I
b
Input Voltage
2.45
2.50
2.55
2.42
2.50
2.58
V
Input Bias Current
-0.3
-1
-0.3
-2
μ
A
dB
A
VOL
2
≤
V
o
≤
4V
(2)
65
90
65
90
B
Unity Gain Bandwidth
0.7
1
0.7
1
MHz
SVR
Supply Voltage Rejection
12V
≤
V
i
≤
25V
V
PIN2
= 2.7V
60
70
60
70
dB
I
o
I
o
Output Sink Current
V
PIN1
= 1.1V
2
6
2
6
V
Output Source Current
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
CURRENT SENSE SECTION
(3 & 4)
-0.5
-0.8
-0.5
-0.8
mA
V
OUT
High
5
6
5
6
V
V
OUT
Low
0.7
1.1
0.7
1.1
V
G
V
V
3
SVR
Gain
2.85
3
3.15
2.8
3
3.2
V/V
Maximum Input Signal
V
PIN1
= 5V (3)
12
≤
V
i
≤
25V (3)
0.9
1
1.1
0.9
1
1.1
V
Supply Voltage Rejection
70
70
dB
I
b
Input Bias Current
-2
-10
-2
-10
μ
A
Delay to Output
150
300
150
300
ns
OUTPUT SECTION
I
SINK
= 20mA
I
SINK
= 200mA
ISOURCE = 20mA
I
OL
Output Low Level
0.1
0.4
0.1
0.4
V
1.5
2.2
1.5
2.2
V
I
OH
Output High Level
13
13.5
13
13.5
V
I
SOURCE
= 200mA
T
j
= 25
°
C
T
j
= 25
°
C
12
13.5
12
13.5
V
t
r
t
f
Rise Time
C
L
= 1nF (2)
50
150
50
150
ns
Fall Time
C
L
= 1nF (2)
50
150
50
150
ns
UC2842/3/4/5-UC3842/3/4/5
3/11
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