TL494, NCV494
120
110
100
90
80
70
60
50
40
30
20
10
0
1.0
% DT, PERCENT DEADTIME (EACH OUTPUT)
A VOL , OPEN LOOP VOLTAGE GAIN (dB)
20
18
16
14
12
10
8.0
6.0
4.0
2.0
0
500 k 1.0 k
10 k
100 k
f
osc
, OSCILLATOR FREQUENCY (Hz)
500 k
0.001
mF
C
T
= 0.001
mF
A
VOL
10
100
1.0 k
10 k
f, FREQUENCY (Hz)
0
20
40
60
80
φ
100
120
140
160
180
100 k
1.0 M
Figure 4. Open Loop Voltage Gain and
Phase versus Frequency
% DC, PERCENT DUTY CYCLE (EACH OUTPUT)
φ
, EXCESS PHASE (DEGREES)
V
CC
= 15 V
DV
O
= 3.0 V
R
L
= 2.0 kW
Figure 5. Percent Deadtime versus
Oscillator Frequency
50
V CE(sat) , SATURATION VOLTAGE (V)
3.5
40
2
30
20
10
0
0
1.0
2.0
3.0
V
DT
, DEADTIME CONTROL VOLTAGE (IV)
1
V
CC
= 15 V
V
OC
= V
ref
1. C
T
= 0.01
mF
2.
R
T
= 10 kW
2. C
T
= 0.001
mF
2.
R
T
= 30 kW
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
0
100
200
300
I
E,
EMITTER CURRENT (mA)
400
Figure 6. Percent Duty Cycle versus
Deadtime Control Voltage
Figure 7. Emitter−Follower Configuration
Output Saturation Voltage versus
Emitter Current
10
9.0
I CC , SUPPLY CURRENT (mA)
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
2.0
VCE(sat), SATURATION VOLTAGE (V)
1.6
1.4
1.2
1.8
1.0
0.8
0.6
0.4
0
100
200
300
I
C
, COLLECTOR CURRENT (mA)
400
0
5.0
10
15
20
25
30
35
40
V
CC
, SUPPLY VOLTAGE (V)
Figure 8. Common−Emitter Configuration
Output Saturation Voltage versus
Collector Current
Figure 9. Standby Supply Current
versus Supply Voltage
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