GL494 Просмотр технического описания (PDF) - Hynix Semiconductor
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GL494 Datasheet PDF : 7 Pages
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4. Emitter-Follower Configuration
GL494
(EACH OUTPUT
15V
EIRCUIT)
90%
90%
CL=15pF
(INCLUDES PROBE AND
JIG CAPACITANCE)
TEST CIRCUIT
Typical Performance Curves
OUTPUT
68Ω
2W
10%
tr
10%
tf
OUTPUT VOLTAGE WAVEFORM
FIGURE 1 – OSCILLATOR FREQUENCY versus
300k
TIMING RESISTANCE
100k
0.001 µF
Vcc=15V
10k
CT=0.01 µF
1k
100
30
1k 2k
0.1 µF
0.1 µF
5k 10k 20k 50k 100k 200k 500k 1M
RT, TIMING RESISTANCE (Ω)
FIGURE 2 – OPEN LOOP VOLTAGE GAIN AND PHASE
100
versus FREQUENCY
20
90
0
80
Vcc=15V
Vo=3V
-20
70
AVOL
RL=2kΩ
-40
60
-60
50
θ
-80
40
-100
30
-120
20
-140
10
-160
0
-80
1.0
10
100
1k
10k 100k 1M
f, FREQUENCY (Hz)
FIGURE 3 – PERCENT DEAD TIME
versus OSCILLATOR FREQUENCY
10
9
8 Vcc=15V
Voc=Vref
7
V(PIN4)=0V
6
5
4
3
2
1
0
100
1k
CT=0.01 µF
0.01 µF
10k
fo, OSCILLATOR FREQUENCY (Hz)
100k
FIGURE 4 – PERCENT DUTY CYCLE versus
DEAD-TIME CONTROL VOLTAGE
50
Vcc=15V
40
Voc=Vref
1) CT=0.01
30
1
RT=10k
2) CT=0.001
RT=30K
20
2
10
0
0
1.0
2.0
3.0 3.5
DEAD TIME CONTROL VOLTAGE (V)
6
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