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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 7. Error Amp Open Loop Gain and
Phase versus Frequency
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
– 20
10
150
180
100
1.0 k
10 k
100 k 1.0 M 10 M
f, FREQUENCY (Hz)
Figure 8. Current Sense Input Threshold
versus Error Amp Output Voltage
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)
0
–4.0
–8.0
–12
–16
–20
–24
0
Figure 9. Reference Voltage Change
versus Source Current
VCC = 15 V
TA = 125°C
TA = 55°C
TA = 25°C
20
40
60
80
100
120
Iref, REFERENCE SOURCE CURRENT (mA)
Figure 10. Reference Short Circuit Current
versus Temperature
110
VCC = 15 V
RL 0.1
90
70
50
–55 –25
0
25
50
75
100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 11. Reference Load Regulation
VCC = 15 V
IO = 1.0 mA to 20 mA
TA = 25°C
Figure 12. Reference Line Regulation
VCC = 12 V to 25 V
TA = 25°C
2.0 ms/DIV
MOTOROLA ANALOG IC DEVICE DATA
2.0 ms/DIV
5
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