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參數(shù)資料
| 型號： | UC3844TD |
| 廠商： | 意法半導體 |
| 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)： | 6/15頁 |
| 文件大?。?/td> | 228K |
| 代理商： | UC3844TD |
-55
-25
0
25
50
75
100 T
A
(C)
7.0
7.5
8.0
8.5
I
dischg
(mA)
D95IN335
V
i
=15V
V
OSC
=2V
Figure 4:
Oscillator Discharge Current vs. Tem-
perature.
1
2
3
5
40
50
60
70
80
90
D
max
(%)
0.8
R
T
(K
)
D95IN336
V
i
=15V
C
T
=3.3nF
T
A
=25C
I
dischg
=7.5mA
I
dischg
=8.8mA
Figure 5:
Maximum Output Duty Cycle vs. Tim-
ing Resistor.
10
100
1K
10K
100K
1M
f(Hz)
-20
0
20
40
60
80
(dB)
180
150
120
90
60
30
φ
D95IN337
V
i
=15V
V
O
=2V to 4V
R
L
=100K
T
A
=25C
Gain
Phase
Figure 6:
Error Amp Open-Loop Gain and
Phase vs. Frequency.
0
2
4
6
V
O
(V)
0.0
0.2
0.4
0.6
0.8
1.0
V
th
(V)
D95IN338
V
i
=15V
T
A
=-40C
T
A
=125C
T
A
=25C
Figure 7:
Current Sense Input Threshold vs. Er-
ror Amp Output Voltage.
0
20
40
60
80
100 I
ref
(mA)
D95IN339
0
10
20
30
40
50
60
V
i
=15V
T
A
=-40C
T
A
=125C
T
A
=
Figure 8:
Reference Voltage Change vs.
Source Current.
-55
-25
0
25
50
75
100 T
A
(C)
D95IN340
50
60
70
80
90
100
I
SC
(mA)
V
i
=15V
R
L
≤
0.1
Figure 9:
Reference Short Circuit Current vs.
Temperature.
UC3842T - UC3843T - UC3844T - UC3845T
6/15
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UC3844TN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| UC3844W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SMPS Controller |
| UC3844Y | 制造商:TI 制造商全稱:Texas Instruments 功能描述:CURRENT MODE PWM CONTROLLER |
| UC3845 | 制造商:STMicroelectronics 功能描述:3845 |
| UC3845A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Current Mode PWM Controller |
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