TL1451A
DUAL PULSE WIDTH MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
TYPICAL CHARACTERISTICS
UNDERVOLTAGE LOCKOUT
HYSTERESIS CHARACTERISTICS
6
TA = 85°C
VCE
VCE – Output Collector Voltage – V
5
Undervoltage Lockout Threshold Voltage – V
TA = 25°C
TA = –20°C
UNDERVOLTAGE LOCKOUT CHARACTERISTIC
3.5
3.25
3
Threshold Voltage –VTL
(Left Scale)
2.75
2.5
Hysteresis Voltage
(Right Scale)
2.25
50
150
300
Undervoltage Lockout Hystersis Voltage – mV
Threshold Voltage –VTH
(Left Scale)
250
200
4
3
5V
2
7,10
8
100
RL
I = IO
VDE
1.25
Short-Circuit Protection
Latch Reset Supply Voltage
(Right Scale)
2.5
1.20
2
1.15
Short-Circuit Protection
Comparator Threshold Voltage
(Left Scale)
1.5
1.10
– 25
50
75
0
25
TA – Free-Air Temperature –
°C
1
100
Figure 13
12
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RS – Latch Reset Supply Voltage – V
Comparator Threshold Voltage – V
ÁÁ
ÁÁ
ÁÁ
1
2
0
IO = 10 mA
0
0
1
2
3
4
5
–25
0
25
50
75
100
VCC – Supply Voltage – V
TA – Free-Air Temperature –
°C
Figure 11
Figure 12
SHORT-CIRCUIT PROTECTION CHARACTERISTICS
1.30
3
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