TL1451A
DUAL PULSE WIDTH MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
REFERENCE OUTPUT VOLTAGE VARIATION
vs
FREE-AIR TEMPERATURE
avref
∆
VO(ref) – Reference Output Voltage Variation – mV
avref
∆
VO(ref) – Reference Output Voltage Variation – mV
30
VCC = 3.6 V
II(ref) = 1 mA
20
30
VCC = 40 V
II(ref) = 1 mA
20
REFERENCE OUTPUT VOLTAGE VARIATION
vs
FREE-AIR TEMPERATURE
0
0
–10
–10
– 30
– 25
75
0
25
50
TA – Free-Air Temperature –
°C
100
Figure 7
REFERENCE OUTPUT VOLTAGE
vs
SUPPLY VOLTAGE
3
VO(ref)– Reference Output Voltage – V
Vref
TA = 25°C
2.5
Dropout Voltage Variation – V
1
2
1.5
1
0.5
0
0
5
10
15
20
25
30
VCC – Supply Voltage – V
35
40
– 25
0
25
50
75
TA – Free-Air Temperature –
°C
100
Figure 9
www.ti.com
ÁÁ
ÁÁ
ÁÁ
ÁÁ
– 20
– 20
– 30
– 25
1.1
II(ref) = 1 mA
0.9
0.8
0.7
0.6
ÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎ
75
0
25
50
TA – Free-Air Temperature –
°C
100
ÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎ
10
10
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Figure 8
DROPOUT VOLTAGE VARIATION
vs
FREE-TEMPERATURE
Figure 10
11
TI [ TEXAS INSTRUMENTS ]
