MC34262_11 Datasheet, PDF (4/19 Pages) ON Semiconductor – Power Factor Controllers

MC34262, MC33262
1.6
V_CC = 12 V
1.4 T_A = 25°C
1.2 _{VPin 2 = 3.75 V}
1.0 ^{VPin 2 = 3.5 V}
0.8 ^{VPin 2 = 3.25 V}
V_{Pin 2} = 3.0 V
0.6
0.4
V_{Pin 2} = 2.75 V
V_{Pin 2} = 2.5 V
V_{Pin 2} = 2.25 V
0.2
0
- 0.2
V_{Pin 2} = 2.0 V
0.6
1.4
2.2
3.0
3.8
V_M, MULTIPLIER PIN 3 INPUT VOLTAGE (V)
Figure 2. Current Sense Input Threshold
versus Multiplier Input
0.08
V_{Pin 2} = 3.75 V
0.07 ^VPin 2 ^{= 3.5 V}
V_{Pin 2} = 3.25 V
0.06 _{VPin 2 = 3.0 V}
0.05 ^{VPin 2 = 2.75 V}
V_CC = 12 V
T_A = 25°C
V_{Pin 2} = 2.5 V
0.04
V_{Pin 2} = 2.25 V
0.03
0.02
0.01
0
- 0.12
V_{Pin 2} = 2.0 V
- 0.06
0
0.06
0.12
0.18
0.24
V_M, MULTIPLIER PIN 3 INPUT VOLTAGE (V)
Figure 3. Current Sense Input Threshold
versus Multiplier Input, Expanded View
 4.0
V_CC = 12 V
Pins 1 to 2
0
- 4.0
- 8.0
-12
-16
- 55
- 25
0
25
50
75
100 125
T_A, AMBIENT TEMPERATURE (°C)
Figure 4. Voltage Feedback Input Threshold
Change versus Temperature
110
V_CC = 12 V
109
108
107
106
- 55 - 25
0
25
50
75 100 125
T_A, AMBIENT TEMPERATURE (°C)
Figure 5. Overvoltage Comparator Input
Threshold versus Temperature
120
Phase
100 _{Transconductance}
80
60
0
V_CC = 12 V
V_O = 2.5 V to 3.5 V ₃₀
R_L = 100 k to 3.0 V
C_L = 2.0 pF
T_A = 25°C
60
90
4.00 V
3.25 V
40
120
20
150 _{2.50 V}
0
180
3.0 k
10 k 30 k
100 k 300 k 1.0 M 3.0 M
f, FREQUENCY (Hz)
Figure 6. Error Amp Transconductance and
Phase versus Frequency
V_CC = 12 V
R_L = 100 k
C_L = 2.0 pF
T_A = 25°C
5.0 ms/DIV
Figure 7. Error Amp Transient Response
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