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UC2845DR2G Fiches technique(PDF) 4 Page - ON Semiconductor

No de pièce UC2845DR2G
Description  High Performance Current Mode Controllers
Download  16 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

UC2845DR2G Fiches technique(HTML) 4 Page - ON Semiconductor

  UC2845DR2G Datasheet HTML 1Page - ON Semiconductor UC2845DR2G Datasheet HTML 2Page - ON Semiconductor UC2845DR2G Datasheet HTML 3Page - ON Semiconductor UC2845DR2G Datasheet HTML 4Page - ON Semiconductor UC2845DR2G Datasheet HTML 5Page - ON Semiconductor UC2845DR2G Datasheet HTML 6Page - ON Semiconductor UC2845DR2G Datasheet HTML 7Page - ON Semiconductor UC2845DR2G Datasheet HTML 8Page - ON Semiconductor UC2845DR2G Datasheet HTML 9Page - ON Semiconductor Next Button
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UC3844, UC3845, UC2844, UC2845
http://onsemi.com
4
0
VO, ERROR AMP OUTPUT VOLTAGE (V)
0
0.2
0.4
0.6
0.8
1.0
1.2
2.0
4.0
6.0
8.0
VCC = 15 V
TA = 25°C
TA = −55°C
TA = 125°C
Figure 2. Timing Resistor versus
Oscillator Frequency
Figure 3. Output Deadtime versus
Oscillator Frequency
Figure 4. Error Amp Small Signal
Transient Response
Figure 5. Error Amp Large Signal
Transient Response
0.5
ms/DIV
VCC = 15 V
AV = −1.0
TA = 25°C
VCC = 15 V
AV = −1.0
TA = 25°C
1.0
ms/DIV
10 k
20 k
50 k
100 k
200 k
500 k
1.0 M
fosc, OSCILLATOR FREQUENCY (Hz)
VCC = 15 V
TA = 25°C
10 k
20 k
50 k
100 k
200 k
500 k
1.0 M
fosc, OSCILLATOR FREQUENCY (Hz)
Figure 6. Error Amp Open Loop Gain and
Phase versus Frequency
Figure 7. Current Sense Input Threshold
versus Error Amp Output Voltage
NOTE: Output switches
at one−half the oscillator
frequency.
CT = 10 nF
5.0 nF
2.0 nF
1.0 nF
100
pF
500
pF
200
pF
2.55 V
2.5 V
2.45 V
2.5 V
3.0 V
2.0 V
10
0
50
20
10
5.0
2.0
1.0
75
70
65
60
55
50
−20
10 M
10
f, FREQUENCY (Hz)
Gain
Phase
VCC = 15 V
VO = 2.0 V to 4.0 V
RL = 100 K
TA = 25°C
0
30
60
90
120
150
180
100
1.0 k
10 k
100 k
1.0 M
0
20
40
60
80
100


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