ISL6131 Ver la hoja de datos (PDF) - Intersil
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ISL6131 Datasheet PDF : 13 Pages
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ISL6131, ISL6132
The resulting falling VMON trip point with configuration
shown is ~0.634V, with ~0.642V for rising which equates to
~95°C for under temperature and ~97°C for over
temperature respectively. Choosing the standard resistor
value above and below R1 allows for small adjustments in
the temperature trip point.
The low ISL6131 VMON temperature coefficient makes this
a viable and low cost addition to complete system
monitoring.
TEMP (°C)
25
50
75
95
100
105
VMON (V)
2.36
1.61
1.01
0.67
0.61
0.54
TEMP STATUS
H = Under Temp
H = Under Temp
H = Under Temp
H = Under Temp
L = Over Temp
L = Over Temp
TEMP INDICATOR
3.3V
3.83k
R1
T
QT0805Y-103J
(REMOTE HEAT
SOURCE LOCATION)
STATUS
VDD
VMON
ISL6131
GND
VMON 0.1V/DIV
Low = OVER TEMP
FIGURE 8. ISL6131 OVER TEMP SENSING CONFIGURATION
TEMP STATUS 5V/DIV
10s/DIV
FIGURE 9. ISL6132 OVER TEMP SENSING RESULT
Functional and Performance Waveforms
VDD RISING
STATUS OUTPUTS TO VDD
PGOOD
1V/DIV
100μs/DIV
FIGURE 10. ISL6131 VDD RISING
STATUS OUTPUTS PULLED-UP TO 1.5V
VDD RISING
PGOOD
1V/DIV
200μs/DIV
FIGURE 11. ISL6131 VDD RISING WITH PULL-UP
8
FN9119.4
August 17, 2010
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