UC2842BD1R2 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
UC2842BD1R2 Datasheet PDF : 21 Pages
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UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV
80
50
20
8.0
5.0
2.0 VCC = 15 V
TA = 25°C
0.8
10 k 20 k
50 k 100 k 200 k
500 k 1.0 M
fOSC, OSCILLATOR FREQUENCY (kHz)
ǒ Ǔ ǒ Ǔ Freq +
1
Ct
Vosc
IRt
)
Ct
Vosc
Idis*IRt
Where: Vosc = 1.7 V
IRt = Vref/Rt
Idis = 8.3 mA
Figure 2. Timing Resistor
versus Oscillator Frequency
100
1. CT = 10 nF
50 2. CT = 5.0 nF
3. CT = 2.0 nF
4. CT = 1.0 nF
20 5. CT = 500 pF
6. CT = 200 pF
10 7. CT = 100 pF
5.0
4
3
2
1
7
6
5
2.0
1.0
10 k
VCC = 15 V
TA = 25°C
20 k
50 k 100 k 200 k
500 k
fOSC, OSCILLATOR FREQUENCY (kHz)
1.0 M
Figure 3. Output Deadtime
versus Oscillator Frequency
9.0
VCC = 15 V
VOSC = 2.0 V
8.5
8.0
7.5
7.0
− 55
− 25 0
25 50
75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 4. Oscillator Discharge Current
versus Temperature
100
90
80
Idischg = 7.5 mA
70
60
Idischg = 8.8 mA
VCC = 15 V
CT = 3.3 nF
50
TA = 25°C
40
0.8 1.0
2.0
3.0 4.0 5.0 6.0 7.0 8.0
RT, TIMING RESISTOR (kW)
Figure 5. Maximum Output Duty Cycle
versus Timing Resistor
2.55 V
2.50 V
VCC = 15 V
AV = −1.0
TA = 25°C
2.45 V
0.5 ms/DIV
Figure 6. Error Amp Small Signal
Transient Response
3.0 V
VCC = 15 V
AV = −1.0
TA = 25°C
2.5 V
2.0 V
1.0 ms/DIV
Figure 7. Error Amp Large Signal
Transient Response
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