TL1451A Datasheet, PDF (18/29 Pages) Texas Instruments – DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL1451A
DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
70
VCC = 5 V
Cref = 470 pF
60 _{TA = 25°C}
CLOSED-LOOP GAIN AND PHASE SHIFT
vs
FREQUENCY
50
40
Closed-Loop Gain
(Left Scale)
30
Phase Shift
(Right Scale)
20
10
0
100
1k
10 k
f – Frequency – Hz
Vref
+
–
39 kΩ
39 kΩ
Cref
100 k
Test Circuit
Figure 21
0°
– 10°
– 20°
– 30°
– 40°
– 50°
– 60°
– 70°
– 80°
– 90°
1M
18
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