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UC2843BDR2G Datasheet(PDF) 5 Page - ON Semiconductor

Part # UC2843BDR2G
Description  High Performance Current Mode Controllers
Download  25 Pages
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

UC2843BDR2G Datasheet(HTML) 5 Page - ON Semiconductor

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UC3842B, UC3843B, UC2842B, UC2843B
www.onsemi.com
5
0.8
2.0
5.0
8.0
20
50
80
1.0 M
500 k
200 k
100 k
50 k
20 k
10 k
fOSC, OSCILLATOR FREQUENCY (kHz)
VCC = 15 V
TA = 25°C
Figure 2. Timing Resistor
versus Oscillator Frequency
Figure 3. Output Deadtime
versus Oscillator Frequency
1.0 M
500 k
200 k
100 k
50 k
20 k
10 k
fOSC, OSCILLATOR FREQUENCY (kHz)
1.0
2.0
5.0
10
20
50
100
1
2
Figure 4. Oscillator Discharge Current
versus Temperature
Figure 5. Maximum Output Duty Cycle
versus Timing Resistor
7.0
-55
TA, AMBIENT TEMPERATURE (°C)
-25
0
25
50
75
100
125
7.5
8.0
8.5
9.0
VCC = 15 V
VOSC = 2.0 V
40
0.8
RT, TIMING RESISTOR (kW)
1.0
2.0
3.0
4.0
5.0 6.0 7.0 8.0
50
60
70
80
90
100
VCC = 15 V
CT = 3.3 nF
TA = 25°C
1. CT = 10 nF
2. CT = 5.0 nF
3. CT = 2.0 nF
4. CT = 1.0 nF
5. CT = 500 pF
6. CT = 200 pF
7. CT = 100 pF
5
Idischg = 8.54 mA
7
3
6
4
VCC = 15 V
TA = 25°C
Figure 6. Error Amp Small Signal
Transient Response
Figure 7. Error Amp Large Signal
Transient Response
1.0
ms/DIV
0.5
ms/DIV
2.55 V
2.50 V
2.45 V
3.0 V
2.5 V
2.0 V
VCC = 15 V
AV = -1.0
TA = 25°C
VCC = 15 V
AV = -1.0
TA = 25°C


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