MC33025 Motorola, MC33025 Datasheet - Page 4

• Manufacturer Part Number: MC33025
• Description: High Speed Double-Ended PWM Controller
• Manufacturer: Motorola

2.55 V
2.45 V
4
100 k
2.5 V
1.0 k
– 20
10 k
470
120
100
80
60
40
20
0
100
10
1. 100 nF
8. 470 pF
5. 4.7 nF
6. 2.2 nF
7. 1.0 nF
2. 47 nF
3. 22 nF
4. 10 nF
C T =
9. 220 pF
1
Figure 3. Error Amp Open Loop Gain and
100
Phase
Figure 1. Timing Resistor versus
Figure 5. Error Amp Small Signal
1000
3
2
f osc , OSCILLATOR FREQUENCY (Hz)
Phase versus Frequency
Oscillator Frequency
Transient Response
1.0 k
5
4
f, FREQUENCY (Hz)
10 4
Gain
7
0.1 s/DIV
6
10 k
9
10 5
8
100 k
10 6
V CC = 15 V
T A = + 25 C
1.0 M
MC34025 MC33025
10 M
10 7
0
45
90
135
3.0 V
2.5 V
2.0 V
1200
1000
1.28
1.26
1.24
1.22
800
600
400
200
1.3
1.2
Figure 2. Oscillator Frequency versus Temperature
– 55
–55
0
Figure 4. PWM Comparator Zero Duty Cycle
V CC = 15 V
Pin 7(9) = 0 V
V CC = 15 V
Threshold Voltage versus Temperature
– 25
–25
Figure 6. Error Amp Large Signal
MOTOROLA ANALOG IC DEVICE DATA
T A , AMBIENT TEMPERATURE ( C)
T A , AMBIENT TEMPERATURE ( C)
0
0
Transient Response
25
25
0.1 s/DIV
50
50
1.0 MHz
400 kHz
50 kHz
75
75
R T = 1.2 k
C T = 1.0 nF
R T = 3.6 k
C T = 1.0 nF
R T = 36 k
C T = 1.0 nF
100
100
125
125