TL1454CPW Datasheet, PDF (2/25 Pages) Texas Instruments – DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

TL1454, TL1454Y
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS086B – APRIL 1995 – REVISED NOVEMBER 1997
functional block diagram
VCC
10
Voltage
REF
7
GND
COMP1 ⁶
IN1 + ⁴ +
IN1 – ^{5 _}
Error
Amplifier 1
1.25 V
2.5 V
To Internal
Circuitry
RT CT
21
OSC
COMP2 ¹¹
IN2 + ¹³ +
IN2 – ^{12 _}
Error
Amplifier 2
UVLO
and
SCP Latch
SCP
Comparator 2
1V
SCP
Comparator 1
1V
0.65 V
PWM
Comparator 1
PWM
Comparator 2
0.65 V
15
SCP
3 14
DTC1 DTC2
1.8 V
1.2 V
16 _REF
VCC
8 _OUT1
VCC
9
OUT2
1.25 V
2
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