TL494 Datasheet, PDF (3/6 Pages) Motorola, Inc – SWITCHMODE PULSE WIDTH MODULATION CONTROL CIRCUIT

Pulse-Width-Modulation Control Circuits
AMPLIFIER
UNDER TEST
+
-
FEEDBACK
TERMINAL
TL494
(EACH OUTPUT
CIRCUIT)
+
Vref
-
OTHER
AMPLIFIER
FIGURE 2. AMPLIFIER CHARACTERISTICS
15 V
68 Ω
2W
OUTPUT
C_L=15pF
(Includes probe
and
jig capacitance)
t_f
90%
10%
t_r
90%
10%
TEST CIRCUIT
OUTPUT VOLTAGE WAVEFORM
FIGURE 3. COMMON-EMITTER CONFIGURATION
(EACH OUTPUT
CIRCUIT)
15 V
Mar. 2006-Rev06
90%
90%
C_L=15pF
(Includes probe
and
jig capacitance)
68 Ω
2W
10%
t_r
10%
t_f
TEST CIRCUIT
OUTPUT VOLTAGE WAVEFORM
FIGURE 4. EMITTER-FOLLOWER CONFIGURATION
147
HTC