TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
70
V
R
C
= 5 V
= 15 Ω
= 470 pF
C :
X
47 pF
470 pF
4700 pF
CC
ref
ref
60
50
40
30
T
A
= 25°C
Phase Shift
(Right Scale)
0°
Closed-Loop Gain
(Left Scale)
–10°
–20°
–30°
–40°
20
–50°
–60°
–70°
10
0
–80°
–90°
100
1 k
10 k
100 k
1 M
f – Frequency – Hz
V
ref
+
–
C
39 kΩ
x
R
ref
C
ref
39 kΩ
Test Circuit
Figure 20
17
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