MC34023 ON Semiconductor, MC34023 Datasheet - Page 5

• Manufacturer Part Number: MC34023
• Description: (MC33023 / MC34023) High Speed Single-Ended PWM Controller
• Manufacturer: ON Semiconductor

2.55 V
2.45 V
2.5 V
100 k
1.0 k
− 20
10 k
470
120
100
80
60
40
20
0
100
10
CT =
1. 100 nF
2. 47 nF
3. 22 nF
4. 10 nF
5. 4.7 nF
6. 2.2 nF
7. 1.0 nF
8. 470 pF
9. 220 pF
1
Figure 4. Error Amp Open Loop Gain and
100
Phase
Figure 6. Error Amp Small Signal
Figure 2. Timing Resistor versus
1000
3
2
f
osc
Phase versus Frequency
, OSCILLATOR FREQUENCY (Hz)
Oscillator Frequency
Transient Response
1.0 k
5
4
f, FREQUENCY (Hz)
10
4
Gain
7
0.1 ms/DIV
6
10 k
9
10
8
5
100 k
10
V
T
1.0 M
A
CC
6
MC34023, MC33023
= + 25°C
= 15 V
http://onsemi.com
10 M
10
7
45
90
135
0
5
1200
1000
3.0 V
2.5 V
2.0 V
800
600
400
200
1.30
1.28
1.26
1.24
1.22
1.20
− 55
0
− 55
Figure 5. PWM Comparator Zero Duty Cycle
V
Pin 7(9) = 0 V
CC
V
− 25
Threshold Voltage versus Temperature
CC
− 25
= 15 V
= 15 V
Figure 7. Error Amp Large Signal
Figure 3. Oscillator Frequency
T
T
A
0
A
0
versus Temperature
, AMBIENT TEMPERATURE (°C)
, AMBIENT TEMPERATURE (°C)
Transient Response
25
25
0.1 ms/DIV
50
50
1.0 MHz
400 kHz
50 kHz
75
75
R
C
R
C
R
C
T
T
T
T
T
T
100
100
= 36 k
= 1.0 nF
= 1.2 k
= 1.0 nF
= 3.6 k
= 1.0 nF
125
125