MC34261 Datasheet, PDF (5/13 Pages) Motorola, Inc – POWER FACTOR CONTROLLERS

MC34261, MC33261
Figure 9. Zero Current Detector Input Threshold
Voltage Change versus Temperature
40
0
20
0
Upper Threshold
(V_in Increasing)
V_CC = 12 V
−20
−40
−55
Lower Threshold
(V_in Decreasing)
−25
0
25
50
75
100
T_A, AMBIENT TEMPERATURE (°C)
−2.0
−4.0
−6.0
4.0
2.0
0
125
0
Figure 10. Output Saturation Voltage
versus Load Current
V_CC
V_CC = 12 V
80 μs Pulsed Load
120 Hz Rate
Source Saturation
(Load to Ground)
Sink Saturation
(Load to V_CC)
Gnd
80
160
240
320
I_O, OUTPUT LOAD CURRENT (mA)
Figure 11. Drive Output Waveform
V_CC = 12 V
90
C_L = 1.0 nF
%
T_A = 25°C
Figure 12. Drive Output Cross Conduction
V_CC = 12 V
C_L = 15 pF
T_A = 25°C
10
%
100 ns/DIV
100 ns/DIV
Figure 13. Supply Current versus Supply Voltage
16
Figure 14. Undervoltage Lockout Thresholds
versus Temperature
12
11
12
Startup Threshold
(V_CC Increasing)
10
8.0
9.0
4.0
V_FB = 0 V
Current Sense = 0 V
8.0
Multiplier = 0 V
C_L = 1.0 nF
7.0
Minimum Operating Threshold
(V_CC Decreasing)
f = 50 kHz
T_A = 25°C
0
0
10
20
30
40
6.0
−55
−25
0
25
50
75
100 125
V_CC, SUPPLY VOLTAGE (V)
T_A, AMBIENT TEMPERATURE (°C)
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