UC2844B Просмотр технического описания (PDF) - Motorola => Freescale
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UC2844B Datasheet PDF : 16 Pages
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UC3844B, 45B UC2844B, 45B
Figure 5. Error Amp Open Loop Gain and
Phase versus Frequency
100
0
VCC = 15 V
80
VO = 2.0 V to 4.0 V 30
60
Gain
RL = 100 k
TA = 25°C
60
40
90
Phase
20
120
0
150
– 20
10
180
100
1.0 k
10 k
100 k 1.0 M 10 M
f, FREQUENCY (Hz)
Figure 6. 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 (VO)
0
– 4.0
– 8.0
– 12
– 16
– 20
– 24
0
Figure 7. 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 8. Reference Short Circuit Current
110
ÄÄÄÄÄÄÄÄ versus Temperature
VCC = 15 V
RL ≤ 0.1 Ω
90
70
50
– 55 – 25
0
25
50
75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 9. Reference Load Regulation
VCC = 15 V
IO = 1.0 mA to 20 mA
TA = 25°C
Figure 10. 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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