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UC2842A View Datasheet(PDF) - Motorola => Freescale

Part NameDescriptionManufacturer
UC2842A HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER Motorola
Motorola => Freescale Motorola
UC2842A Datasheet PDF : 14 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
UC3842A, 43A UC2842A, 43A
Figure 1. Timing Resistor versus
Oscillator Frequency
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
fOSC, OSCILLATOR FREQUENCY (Hz)
1.0 M
Figure 2. Output Deadtime versus
Oscillator Frequency
100
50
VCC = 15 V
TA = 25°C
20
10
5.0
2.0
1.0
10 k
20 k
50 k 100 k 200 k
500 k
fOSC, OSCILLATOR FREQUENCY (Hz)
1.0 M
Figure 3. Oscillator Discharge Current
versus Temperature
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. Maximum Output Duty Cycle
versus Timing Resistor
100
VCC = 15 V
90
CT = 3.3 nF
TA = 25°C
80 Idischg = 7.2 mA
70
60
50
Idischg = 9.5 mA
40
800 1.0 k
2.0 k
3.0 k 4.0 k
RT, TIMING RESISTOR ()
6.0 k 8.0 k
2.55 V
Figure 5. Error Amp Small Signal
Transient Response
VCC = 15 V
AV = –1.0
TA = 25°C
2.5 V
2.45 V
0.5 µs/DIV
Figure 6. Error Amp Large Signal
Transient Response
VCC = 15 V
3.0 V
AV = –1.0
TA = 25°C
2.5 V
2.0 V
0.1 µs/DIV
4
MOTOROLA ANALOG IC DEVICE DATA
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