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UC3843A 数据表(PDF) 6 Page - STMicroelectronics

部件名 UC3843A
功能描述  HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
PDF  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

UC3843A 数据表(HTML) 6 Page - STMicroelectronics

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-55
-25
0
25
50
75
100 TA(°C)
7.0
7.5
8.0
8.5
Idischg
(mA)
D95IN335
Vi=15V
VOSC=2V
Figure 4: Oscillator Discharge Current vs. Tem-
perature.
10
100
1K
10K
100K
1M
f(Hz)
-20
0
20
40
60
80
(dB)
180
150
120
90
60
30
φ
D95IN337
Vi=15V
VO=2V to 4V
RL=100K
TA=25°C
Gain
Phase
Figure 5: Error Amp Open-Loop Gain and
Phase vs. Frequency.
02
46
VO(V)
0.0
0.2
0.4
0.6
0.8
1.0
Vth
(V)
D95IN338
Vi=15V
TA=-40°C
TA=125°C
TA=25°C
Figure 6: Current Sense Input Threshold vs. Er-
ror Amp Output Voltage.
0
2040
6080
100 Iref(mA)
D95IN339
0
10
20
30
40
50
60
Vi=15V
TA=-40°C
TA=125°C
Figure 7: Reference Voltage Change vs.
Source Current.
-55
-25
0
25
50
75
100 TA(°C)
D95IN340
50
60
70
80
90
100
ISC
(mA)
Vi=15V
RL≤0.1Ω
Figure 8: Reference Short Circuit Current vs.
Temperature.
UC2842A/3A/4A/5A - UC3842A/3A/4A/5A
6/15



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