參數(shù)資料
型號(hào)： UC284XA
廠商： 意法半導(dǎo)體
英文描述： HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
中文描述： 高性能電流模式PWM控制器
文件頁數(shù)： 3/16頁
文件大?。?/td> 171K
代理商： UC284XA
3/16
UC384XA - UC284XA
Table 4. Thermal Data
Symbol
R
th j-amb
Parameter
DIP-8
100
SO-8
150
Unit
°C/W
Thermal Resistance Junction-ambient
Max.
Table 5. Electrical Characteristcs
( [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)
Symbol
Parameter
Test Condition
UC284XA
Min. Typ.
UC384XA
Min. Typ.
Unit
Max.
Max.
REFERENCE SECTION
V
REF
Output Voltage
V
REF
Line Regulation
V
REF
Load Regulation
V
REF
/
T
Temperature Stability
Total Output Variation
e
N
Output Noise 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
2
20
2
20
mV
3
25
3
25
mV
0.2
0.2
mV/°C
Line, Load, Temperature
10Hz
≤
f
≤
10KHz
T
j
= 25°C (note 2)
T
amb
= 125
°
C,
1000Hrs
(note 2)
4.9
5.1
4.82
5.18
V
μ
V
50
50
Long Term Stability
5
25
5
25
mV
I
SC
Output Short Circuit
-30
-100
-180
-30
-100
-180
mA
OSCILLATOR SECTION
f
OSC
Frequency
f
OSC
/
V
Frequency Change with Volt.
V
REF
/
T
Frequency Change with Temp.
V
OSC
Oscillator Voltage Swing
I
dischg
Discharge Current (V
OSC
=2V)
ERROR AMP SECTION
V
2
Input Voltage
I
b
Input Bias Current
A
VOL
BW
Unity Gain Bandwidth
T
j
= 25°C
V
CC
= 12V to 25V
T
A
= T
low
to T
high
(peak to peak)
47
52
57
47
52
57
KHz
–
–
0.2
5
1
–
–
–
0.2
5
1
–
%
%
–
1.6
–
–
1.6
–
V
T
J
= 25°C
7.8
8.3
8.8
7.8
8.3
8.8
mA
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
2.45
2.50
2.55
2.42
2.50
2.58
V
μ
A
dB
-0.1
90
-1
-0.1
90
-2
65
65
0.7
1
0.7
1
MHz
PSRR
I
o
Power Supply Rejec. Ratio
Output Sink Current
60
2
70
12
60
2
70
12
dB
mA
I
o
Output Source Current
-0.5
-1
-0.5
-1
mA
V
OUT
High
5
6.2
5
6.2
V
V
OUT
Low
0.8
1.1
0.8
1.1
V
CURRENT SENSE SECTION
G
V
Gain
V
3
Maximum Input Signal
SVR
Supply Voltage Rejection
(note 3 & 4)
V
PIN1
= 5V (note 3)
12
≤
V
i
≤
25V (note 3)
2.85
0.9
3
1
3.15
1.1
2.85
0.9
3
1
3.15
1.1
V/V
V
70
70
dB
μ
A
ns
I
b
Input Bias Current
Delay to Output
-2
150
-10
300
-2
150
-10
300
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