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