Datasheet

 
  
SLVS077D – APRIL 1977 – REVISED FEBRUARY 2003
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Frequency – Hz
–10
0
10
20
30
40
50
60
70
80
90
Open-Loop Voltage Amplification of Error Amplifier – dB
10 M1 M100 k10 k1 k100
R
L
is resistance from COMP to ground
R
L
= 300 kΩ
R
L
= 1 MΩ
R
L
= 100 kΩ
R
L
= 30 kΩ
OPEN-LOOP VOLTAGE AMPLIFICATION
OF ERROR AMPLIFIER
vs
FREQUENCY
V
CC
= 20 V
T
A
= 25°C
R
L
= ∞
Figure 3
1
– Oscillator Frequency – Hz
R
T
– Timing Resistance – kΩ
20 40 1007010742
OSCILLATOR FREQUENCY
vs
TIMING RESISTANCE
V
CC
= 20 V
T
A
= 25°C
1M
400 k
100 k
40 k
10 k
4 k
1 k
400
100
C
T
= 0.1 µF
C
T
= 0.01 µF
C
T
= 0.03 µF
C
T
= 0.003 µF
C
T
= 0
f
osc
C
T
= 0.001 µF
Figure 4
OUTPUT DEAD TIME
vs
TIMING CAPACITANCE
1
10
4
0.001 0.01
Output Dead Time –
0.004 0.10.04
0.1
0.4
µs
C
T
– Timing Capacitance – µF
Figure 5