UC284XBN View Datasheet(PDF) - ON Semiconductor
Part Name
Description
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UC284XBN Datasheet PDF : 20 Pages
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2.55 V
2.50 V
UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
VCC = 15 V
3.0 V
AV = -1.0
TA = 25°C
2.5 V
VCC = 15 V
AV = -1.0
TA = 25°C
2.45 V
0.5 µs/DIV
Figure 6. Error Amp Small Signal
Transient Response
2.0 V
1.0 µs/DIV
Figure 7. Error Amp Large Signal
Transient Response
100
0
VCC = 15 V
80
Gain
VO = 2.0 V to 4.0 V
RL = 100 K
30
TA = 25°C
60
60
40
90
Phase
20
120
0
150
-Ă20
10
180
100
1.0 k
10 k
100 k 1.0 M 10 M
f, FREQUENCY (Hz)
Figure 8. Error Amp Open Loop Gain and
Phase versus Frequency
1.2
VCC = 15 V
1.0
0.8
TA = 25°C
0.6
TA = 125°C
0.4
TA = -55°C
0.2
0
0
2.0
4.0
6.0
8.0
VO, ERROR AMP OUTPUT VOLTAGE (V)
Figure 9. Current Sense Input Threshold
versus Error Amp Output Voltage
0
ÄÄÄÄ VCC = 15 V
-Ă4.0
-Ă8.0
-12
-16
-Ă20
ÄÄÄÄ ÄÄÄÄÄÄ TA=125°C
TA = -55°C
ÄÄÄÄÄÄÄÄÄÄÄÄ TA = 25°C
-Ă24
0
20
40
60
80
100
120
Iref, REFERENCE SOURCE CURRENT (mA)
Figure 10. Reference Voltage Change
versus Source Current
110
ÄÄÄÄÄÄ VCC = 15 V
RL ≤ 0.1 Ω
90
70
50
-Ă55 -Ă25
0
25
50
75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 11. Reference Short Circuit Current
versus Temperature
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