TL494_101 Datasheet, PDF (2/19 Pages) Texas Instruments – PULSE-WIDTH-MODULATION CONTROL CIRCUITS

TL494
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005
INPUT TO
OUTPUT CTRL
V_I = GND
V_I = V_ref
FUNCTION TABLE
OUTPUT FUNCTION
Single-ended or parallel output
Normal push-pull operation
RT ⁶
CT ⁵
4 ^{≈ 0.1 V}
DTC
FUNCTIONAL BLOCK DIAGRAM
Oscillator
Dead-Time Control
Comparator
OUTPUT CTRL
(see Function Table)
13
1D
C1
1IN+ ¹
1IN− ²
≈ 0.7 V
Error Amplifier 1
+
−
PWM
Comparator
2IN+ ¹⁶
2IN− ¹⁵
Error Amplifier 2
+
−
Pulse-Steering
Flip-Flop
Reference
Regulator
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0.7 mA
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Q1 _{8 C1}
9 _E1
Q2 _{11 C2}
10
E2
12 _VCC
14
REF
7 _GND
2