參數(shù)資料
型號(hào)： UC3849Q
英文描述： Current-Mode SMPS Controller
中文描述： 電流模式開(kāi)關(guān)電源控制器
文件頁(yè)數(shù)： 3/8頁(yè)
文件大?。?/td> 530K
代理商： UC3849Q
3
UC1842A/3A/4A/5A
UC2842A/3A/4A/5A
UC3842A/3A/4A/5A
PARAMETER
TEST CONDITIONS
UC184xA\UC284xA
MIN.
TYP.
UC384xA
TYP.
UNITS
MAX.
MIN.
MAX.
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temp. Stability
Total Output Variation
Output Noise Voltage
T
J
= 25°C, I
O
= 1mA
12
≤
V
IN 25V
1
≤
I
O
≤
20mA
(Note 2, Note 7)
Line, Load, Temp.
10Hz
≤
f
≤
10kHz
T
J
= 25°C (Note 2)
T
A
= 125°C, 1000Hrs. (Note 2)
4.95
5.00
6
6
0.2
5.05
20
25
0.4
5.1
4.90
5.00
6
6
0.2
5.10
20
25
0.4
5.18
V
mV
mV
mV/°C
V
4.9
4.82
50
5
-100
50
5
-100
μ
V
mV
mA
Long Term Stability
Output Short Circuit
Oscillator Section
Initial Accuracy
Voltage Stability
Temp. Stability
Amplitude
Discharge Current
25
-180
25
-180
-30
-30
T
J
= 25°C (Note 6)
12
≤
V
CC
≤
25V
T
MIN
≤
T
A
≤
T
MAX
(Note 2)
V
PIN 4
peak to peak (Note 2)
T
J
= 25°C, V
PIN 4
= 2V (Note 8)
V
PIN 4
= 2V (Note 8)
47
52
0.2
5
1.7
8.3
57
1
47
52
0.2
5
1.7
8.3
57
1
kHz
%
%
V
mA
mA
7.8
7.5
8.8
8.8
7.8
7.6
8.8
8.8
Error Amp Section
Input Voltage
Input Bias Current
A
VOL
Unity Gain Bandwidth
PSRR
Output Sink Current
Output Source Current
V
OUT
High
V
OUT
Low
Current Sense Section
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
Output Section
Output Low Level
V
PIN 1
= 2.5V
2.45
2.50
-0.3
90
1
70
6
-0.8
6
0.7
2.55
-1
2.42
2.50
-0.3
90
1
70
6
-0.8
6
0.7
2.58
-2
V
μ
A
dB
MHz
dB
mA
mA
V
V
2
≤
V
O
≤
4V
T
J
= 25°C (Note 2)
12
≤
V
CC
≤
25V
V
PIN 2
= 2.7V, V
PIN 1
= 1.1V
V
PIN 2
= 2.3V, V
PIN 1
= 5V
V
PIN 2
= 2.3V, R
L
= 15k to ground
V
PIN 2
= 2.7V, R
L
= 15k to Pin 8
65
0.7
60
2
-0.5
5
65
0.7
60
2
-0.5
5
1.1
1.1
(Note 3, Note 4)
V
PIN 1
= 5V (Note 3)
12
≤
V
CC
≤
25V (Note 3)
2.85
0.9
3
1
70
-2
150
3.15
1.1
2.85
0.9
3
1
70
-2
150
3.15
1.1
V/V
V
dB
μ
A
ns
-10
300
-10
300
V
PIN 3
= 0 to 2V (Note 2)
I
SINK
= 20mA
I
SINK
= 200mA
I
SOURCE
= 20mA
I
SOURCE
= 200mA
T
J
= 25°C, C
L
= 1nF (Note 2)
T
J
= 25°C, C
L
= 1nF (Note 2)
V
CC
= 5V, I
SINK
= 10mA
0.1
15
13.5
13.5
50
50
0.7
0.4
2.2
0.1
15
13.5
13.5
50
50
0.7
0.4
2.2
V
V
V
V
ns
ns
V
Output High Level
13
12
13
12
Rise Time
Fall Time
UVLO Saturation
150
150
1.2
150
150
1.2
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, these specifications apply for –55
°
C
≤
T
A
≤
125°C for the
UC184xA; –40
°
C
≤
T
A
≤
85
°
C for the UC284xA; 0
≤
T
A
≤
70
°
C for the UC384xA; V
CC
= 15V (Note 5); R
T
= 10k; C
T
= 3.3nF; T
A
= T
J
;
Pin numbers refer to DIL-8.
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