參數(shù)資料
型號(hào)： UC2845AAY
廠(chǎng)商： Microsemi Corporation
英文描述： CURRENT MODE PWM CONTROLLER
中文描述： 電流模式PWM控制器
文件頁(yè)數(shù)： 3/8頁(yè)
文件大小： 242K
代理商： UC2845AAY
C
U R R E N T
M
O D E
PWM C
O N T R O L L E R
UC184xA/284xA/384xA
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
3
Copyright 1995
Rev. 1.2 12/95
P
R O D U C T I O N
D
A T A
S
H E E T
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for UC384xA with 0°C
≤
T
≤
70°C, UC284xA with -40°C
≤
T
≤
85°C,
UC184xA with -55°C
≤
T
≤
125°C; V
CC
=15V; R
T
=10K; C
T
=3.3nF. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal
to the ambient temperature.)
Reference Section
Output Voltage
Line Regulation
Load Regulation
Temperature Stability (Note 2 & 7)
Total Output Variation
Output Noise Voltage (Note 2)
Long Term Stability (Note 2)
Output Short Circuit Current
Oscillator Section
Initial Accuracy (Note 6)
Voltage Stability
Temperature Stability (Note 2)
Amplitude (Note 2)
Discharge Current
Parameter
Symbol
Test Conditions
V
REF
T
J
= 25°C, I
L
= 1mA
12
≤
V
IN
≤
25V
1
≤
I
O
≤
20mA
Over Line, Load, and Temperature
10Hz
≤
f
≤
10kHz, T
J
= 25°C
T
A
= 125°C, t = 1000hrs
V
N
I
SC
UC384xA
Units
Min. Typ. Max. Min. Typ. Max.
UC184xA/284xA
4.95 5.00 5.05 4.90 5.00 5.10
6
20
6
25
0.2
0.4
4.9
5.1
50
5
25
-30
-100 -180
V
6
6
20
25
0.4
5.18
mV
mV
mV/°C
V
μV
mV
mA
0.2
4.82
50
5
-100 -180
25
-30
T
J
= 25°C
12
≤
V
CC
≤
25V
T
MIN
≤
T
A
≤
T
MAX
T
J
= 25°C, V
PIN 4
= 2V
V
PIN 4
= 2V, T
MIN
≤
T
A
≤
T
MAX
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
Output Low Level
V
OL
I
SINK
= 20mA
I
SINK
= 200mA
I
SOURCE
= 20mA
I
SOURCE
= 200mA
T
J
= 25°C, C
L
= 1nF
T
J
= 25°C, C
L
= 1nF
V
CC
= 5V, I
SINK
= 10mA
(Electrical Characteristics continue next page.)
Output High Level
V
OH
Rise Time (Note 2)
Fall Time (Note 2)
UVLO Saturation
T
R
T
F
V
SAT
Current Sense Section
Gain (Note 3 & 4)
Maximum Input Signal (Note 3)
Power Supply Rejection Ratio (Note 3)
Input Bias Current
Delay to Output (Note 2)
Output Section
A
VOL
V
PIN 1
= 5V
12
≤
V
CC
≤
25V
PSRR
I
B
T
pd
V
PIN 3
= 0 to 2V
2.85
0.9
3
1
3.15 2.85
1.1
3
1
3.15
1.1
V/V
V
dB
μA
ns
0.9
70
-2
150
70
-2
150
-10
300
-10
300
0.1
1.5
13.5
13.5
50
50
0.7
0.4
2.2
0.1
1.5
13.5
13.5
50
50
0.7
0.4
2.2
V
V
V
V
ns
ns
V
13
12
13
12
150
150
1.2
150
150
1.2
Error Amp Section
Input Voltage
Input Bias Current
Open Loop Gain
Unity Gain Bandwidth (Note 2)
Power Supply Rejection Ratio (Note 3)
Output Sink Current
Output Source Current
Output Voltage High Level
Output Voltage Low Level
V
PIN 1
= 2.5V
I
B
A
VOL
UGBW
PSRR
I
OL
I
OH
V
OH
V
OL
2
≤
V
O
≤
4V
T
j
= 25°C
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 V
REF
2.45 2.50 2.55 2.42 2.50 2.58
-0.3
-1
65
90
0.7
1
60
70
2
6
-0.5
-0.8
5
6
0.7
1.1
V
-0.3
90
1
70
6
-0.8
6
0.7
-2
μA
dB
MHz
dB
mA
mA
V
V
65
0.7
60
2
-0.5
5
1.1
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