MC34261 Datasheet, PDF (4/13 Pages) Motorola, Inc – POWER FACTOR CONTROLLERS

MC34261, MC33261
Figure 3. Voltage Feedback Input Threshold
Change versus Temperature
+4.0
V_CC = 12 V
Pins 1 to 2
0
−4.0
−8.0
−12
Figure 4. Error Amp Open Loop Gain and
Phase versus Frequency
100
80
Gain
60
0
V_CC = 12 V
V_O = 3.0 V to 3.5 V
R_L = 100 k
30
T_A = 25°C
60
40
90
20
Phase ₁₂₀
0
150
−16
−55
−25 0
−20
25
50
75 100 125
10
T_A, AMBIENT TEMPERATURE (°C)
180
100
1.0 k 10 k 100 k 1.0 M 10 M
f, FREQUENCY (Hz)
2.55 V
Figure 5. Error Amp Small Signal
Transient Response
V_CC = 12 V
A_V = −1.0
T_A = 25°C
3.0 V
Figure 6. Error Amp Large Signal
Transient Response
V_CC = 12 V
A_V = −1.0
T_A = 25°C
2.5 V
2.5 V
2.45 V
2.0 V
0.5 μs/DIV
1.0 μs/DIV
Figure 7. Error Amp Output Saturation
versus Sink Current
5.0
V_CC = 12 V
V_FB = 2.7 V
4.0 T_A = 25°C
3.0
2.0
1.0
0
0
0.5
1.0
1.5
2.0
I_Sink, OUTPUT SINK CURRENT (mA)
Figure 8. Restart Time Delay versus Temperature
525
475
425
V_CC = 12 V
375
325
275
−55
−25
0
25
50
75 100 125
T_A, AMBIENT TEMPERATURE (°C)
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