
SEME
LAB
IP5661C
IP5561C
TYPICAL PERFORMANCE CHARACTERISTICS — ERROR AMPLIFIER
Open Loop Phase
0
-30
Open Loop Gain
60
50
-60
40
-90
30
-120
20
-150
-180
1k
10k
100k
1M
10M
FREQUENCY (Hz)
10
0
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Transfer Curve of Pulse Width Modulator
Duty Cycle vs Input Voltage
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
VPin 4
Maximum Duty Cycle vs
Base Voltage on Q1
100
90
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
VPin 1
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 4/95