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UC2844DR2 датащи(PDF) 4 Page - ON Semiconductor

номер детали UC2844DR2
подробное описание детали  High Performance Current Mode Controllers
Download  16 Pages
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производитель  ONSEMI [ON Semiconductor]
домашняя страница  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

UC2844DR2 датащи(HTML) 4 Page - ON Semiconductor

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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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