TL1464 Datasheet, PDF (8/11 Pages) Texas Instruments – QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT

TL1464I
QUAD PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS266 – FEBRUARY 2000
OSCILLATOR
WAVEFORM (see Note A)
DEAD-TIME
INPUT VOLTAGE
ERROR AMP. OUTPUT
PWM COMP. OUTPUT
OUTPUT PIN WAVEFORM
REGULATED OUTPUT
VOLTAGE (see Note B)
SCP PIN WAVEFORM
SCP COMP. OUTPUT
POWER SUPPLY
VOLTAGE
2.7 V
1.4 V
0.7 V
0V
“H”
“L”
DEAD-TIME 100%
“H”
“L”
VA
VA
VA
0V
Vref + 0.7 V
1.5 V
tpe
“H”
“L”
VCC
0V
Protection Enable Time, tpe = 477×103 Cpe (sec)
Figure 1. Timing Diagram (CH-1/CH-2)
OSCILLATOR
WAVEFORM (see Note A)
ERROR AMP. OUTPUT
1.4 V
0.7 V
PWM COMP. OUTPUT
OUTPUT PIN WAVEFORM
REGULATED OUTPUT
VOLTAGE (see Note B)
VA
VA
“H”
“L”
DEAD-TIME 100%
“H”
“L”
VA
0V
SCP PIN WAVEFORM
Vref + 0.7 V
1.5 V
SCP COMP. OUTPUT
POWER SUPPLY
VOLTAGE
2.7 V
tpe
“H”
“L”
VCC
0V
Protection Enable Time, tpe = 477×103 Cpe (sec)
Figure 2. Timing Diagram (CH-3/CH-4)
NOTES: A. Oscillator waveform of CH-1 and CH-2 is inverting output each other.
B. Va = input voltage of pin 29 (pin 24)
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