TL1454A_14 Datasheet, PDF (2/25 Pages) Texas Instruments – DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

TL1454A, TL1454AY
DUALĆCHANNEL PULSEĆWIDTHĆMODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A− MAY 2002 − REVISED SEPTEMBER 2002
functional block diagram
VCC
10
Voltage
REF
7
GND
COMP1 ⁶
IN1 + ⁴ +
IN1 − ^{5 _}
Error
Amplifier 1
1.26 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
SCP
1V
1V
Comparator 1
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
1.27 V
2
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