TL1454A_14 Datasheet, PDF (15/25 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
TYPICAL CHARACTERISTICS
UVLO THRESHOLD VOLTAGE
vs
FREE-AIR TEMPERATURE
3.5
VIT(H)
3
VIL(L)
2.5
2
1.5
DUTY CYCLE
vs
DTC INPUT VOLTAGE
120
VCC = 6 V
CT = 120 pF
100
RT = 10 kΩ
TA = 25°C
80
60
40
20
1
−50 −25
0
25
50
75 100
TA − Free-Air Temperature − °C
Figure 14
ERROR-AMPLIFIER MAXIMUM OUTPUT VOLTAGE
vs
SOURCE CURRENT
2.5
VCC = 6 V
VID = 0.1 V
TA = 25°C
2
0
0
0.25 0.5 0.75
1
1.25 1.5
VI(DTC) − DTC Input Voltage − V
Figure 15
ERROR-AMPLIFIER MINIMUM OUTPUT VOLTAGE
vs
SINK CURRENT
2.5
VCC = 6 V
VID = 0.1 V
2
1.5
1.5
1
1
0.5
0.5
0
0
0
40
80
120
0
0.5
1
1.5
Source Current − µA
Sink Current − mA
Figure 16
Figure 17
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15